comments.json

[ 
{ "page": "0x000", "logical": "0xe000", "text": "$e000"},
{ "page": "0x000", "logical": "0xe003", "text": "$e003"},
{ "page": "0x000", "logical": "0xe006", "text": "$e006"},
{ "page": "0x000", "logical": "0xe009", "text": "$e009"},
{ "page": "0x000", "logical": "0xe00c", "text": "$e00c"},
{ "page": "0x000", "logical": "0xe00f", "text": "$e00f"},
{ "page": "0x000", "logical": "0xe012", "text": "$e012"},
{ "page": "0x000", "logical": "0xe015", "text": "$e015"},
{ "page": "0x000", "logical": "0xe018", "text": "$e018"},
{ "page": "0x000", "logical": "0xe01b", "text": "$e01b"},
{ "page": "0x000", "logical": "0xe01e", "text": "$e01e"},
{ "page": "0x000", "logical": "0xe021", "text": "$e021"},
{ "page": "0x000", "logical": "0xe024", "text": "$e024"},
{ "page": "0x000", "logical": "0xe027", "text": "$e027"},
{ "page": "0x000", "logical": "0xe02a", "text": "$e02a"},
{ "page": "0x000", "logical": "0xe02d", "text": "$e02d"},
{ "page": "0x000", "logical": "0xe030", "text": "$e030"},
{ "page": "0x000", "logical": "0xe033", "text": "$e033"},
{ "page": "0x000", "logical": "0xe036", "text": "$e036"},
{ "page": "0x000", "logical": "0xe039", "text": "$e039"},
{ "page": "0x000", "logical": "0xe03c", "text": "$e03c"},
{ "page": "0x000", "logical": "0xe03f", "text": "$e03f"},
{ "page": "0x000", "logical": "0xe042", "text": "$e042"},
{ "page": "0x000", "logical": "0xe045", "text": "$e045"},
{ "page": "0x000", "logical": "0xe048", "text": "$e048"},
{ "page": "0x000", "logical": "0xe04b", "text": "$e04b"},
{ "page": "0x000", "logical": "0xe04e", "text": "$e04e"},
{ "page": "0x000", "logical": "0xe051", "text": "$e051"},
{ "page": "0x000", "logical": "0xe054", "text": "$e054"},
{ "page": "0x000", "logical": "0xe057", "text": "$e057"},
{ "page": "0x000", "logical": "0xe05a", "text": "$e05a"},
{ "page": "0x000", "logical": "0xe05d", "text": "$e05d"},
{ "page": "0x000", "logical": "0xe060", "text": "$e060"},
{ "page": "0x000", "logical": "0xe063", "text": "$e063"},
{ "page": "0x000", "logical": "0xe066", "text": "$e066"},
{ "page": "0x000", "logical": "0xe069", "text": "$e069"},
{ "page": "0x000", "logical": "0xe06c", "text": "$e06c"},
{ "page": "0x000", "logical": "0xe06f", "text": "$e06f"},
{ "page": "0x000", "logical": "0xe072", "text": "$e072"},
{ "page": "0x000", "logical": "0xe075", "text": "$e075"},
{ "page": "0x000", "logical": "0xe078", "text": "$e078"},
{ "page": "0x000", "logical": "0xe07b", "text": "$e07b"},
{ "page": "0x000", "logical": "0xe07e", "text": "$e07e"},
{ "page": "0x000", "logical": "0xe081", "text": "$e081"},
{ "page": "0x000", "logical": "0xe084", "text": "$e084"},
{ "page": "0x000", "logical": "0xe087", "text": "$e087"},
{ "page": "0x000", "logical": "0xe08a", "text": "$e08a"},
{ "page": "0x000", "logical": "0xe08d", "text": "$e08d"},
{ "page": "0x000", "logical": "0xe090", "text": "$e090"},
{ "page": "0x000", "logical": "0xe093", "text": "$e093"},
{ "page": "0x000", "logical": "0xe096", "text": "$e096"},
{ "page": "0x000", "logical": "0xe099", "text": "$e099"},
{ "page": "0x000", "logical": "0xe09c", "text": "$e09c"},
{ "page": "0x000", "logical": "0xe09f", "text": "$e09f"},
{ "page": "0x000", "logical": "0xe0a2", "text": "$e0a2"},
{ "page": "0x000", "logical": "0xe0a5", "text": "$e0a5"},
{ "page": "0x000", "logical": "0xe0a8", "text": "$e0a8"},
{ "page": "0x000", "logical": "0xe0ab", "text": "$e0ab"},
{ "page": "0x000", "logical": "0xe0ae", "text": "$e0ae"},
{ "page": "0x000", "logical": "0xe0b1", "text": "$e0b1"},
{ "page": "0x000", "logical": "0xe0b4", "text": "$e0b4"},
{ "page": "0x000", "logical": "0xe0b7", "text": "$e0b7"},
{ "page": "0x000", "logical": "0xe0ba", "text": "$e0ba"},
{ "page": "0x000", "logical": "0xe0bd", "text": "$e0bd"},
{ "page": "0x000", "logical": "0xe0c0", "text": "$e0c0"},
{ "page": "0x000", "logical": "0xe0c3", "text": "$e0c3"},
{ "page": "0x000", "logical": "0xe0c6", "text": "$e0c6"},
{ "page": "0x000", "logical": "0xe0c9", "text": "$e0c9"},
{ "page": "0x000", "logical": "0xe0cc", "text": "$e0cc"},
{ "page": "0x000", "logical": "0xe0cf", "text": "$e0cf"},
{ "page": "0x000", "logical": "0xe0d2", "text": "$e0d2"},
{ "page": "0x000", "logical": "0xe0d5", "text": "$e0d5"},
{ "page": "0x000", "logical": "0xe0d8", "text": "$e0d8"},
{ "page": "0x000", "logical": "0xe0db", "text": "$e0db"},
{ "page": "0x000", "logical": "0xe0de", "text": "$e0de"},
{ "page": "0x000", "logical": "0xe0e1", "text": "$e0e1"},
{ "page": "0x000", "logical": "0xe0e4", "text": "$e0e4"},
{ "page": "0x000", "logical": "0xe0e7", "text": "$e0e7"},
{ "page": "0x000", "logical": "0xe0ea", "text": "$e0ea"},
{ "page": "0x000", "logical": "0xe0ed", "text": "$e0ed"},
{ "page": "0x000", "logical": "0xe0f0", "text": "$e0f0"},
{ "page": "0x000", "logical": "0xe0f3", "text": "$e0f3"},
{ "page": "0x000", "logical": "0xe0f6", "text": "$e0f6"},
{ "page": "0x000", "logical": "0xe0f9", "text": "$e0f9"},
{ "page": "0x000", "logical": "0xe0fc", "text": "$e0fc"},
{ "page": "0x000", "logical": "0xe0ff", "text": "$e0ff"},
{ "page": "0x000", "logical": "0xe102", "text": "$e102"},
{ "page": "0x000", "logical": "0xe105", "text": "$e105"},
{ "page": "0x000", "logical": "0xe108", "text": "$e108"},
{ "page": "0x000", "logical": "0xe10b", "text": "$e10b"},
{ "page": "0x000", "logical": "0xe10e", "text": "$e10e"},
{ "page": "0x000", "logical": "0xe111", "text": "$e111"},

{ "page": "0x000", "logical": "0xe181", "text": "output buffer lsb"},
{ "page": "0x000", "logical": "0xe185", "text": "output buffer msb"},
{ "page": "0x000", "logical": "0xe189", "text": "get dir info de 00"},
{ "page": "0x000", "logical": "0xe193", "text": "output buffer lsb"},
{ "page": "0x000", "logical": "0xe197", "text": "output buffer lsb"},
{ "page": "0x000", "logical": "0xe19b", "text": "get dir info de 01"},

{ "page": "0x000", "logical": "0xe22a", "text": "setting bit 2 will reset CDROM hardware"},
{ "page": "0x000", "logical": "0xe237", "text": "reset bit 2"},
{ "page": "0x000", "logical": "0xe23f", "text": "wait a little longer"},

{ "page": "0x000", "logical": "0xe24e", "text": "get SCSI status code"},
{ "page": "0x000", "logical": "0xe255", "text": "process subcode error"},
{ "page": "0x000", "logical": "0xe258", "text": "and try to resend command if possible"},
    
{ "page": "0x000", "logical": "0xe267", "text": "it will wait for A*(loop cycles)"},
{ "page": "0x000", "logical": "0xe269", "text": "2"},
{ "page": "0x000", "logical": "0xe26b", "text": "2"},
{ "page": "0x000", "logical": "0xe26d", "text": "2"},
{ "page": "0x000", "logical": "0xe26e", "text": "4 (2 if the branch is not taken)"},
{ "page": "0x000", "logical": "0xe270", "text": "2"},
{ "page": "0x000", "logical": "0xe271", "text": "4 (2 if the branch is not taken)"},
{ "page": "0x000", "logical": "0xe273", "text": "= 7962 cycles"},

{ "page": "0x000", "logical": "0xe27b", "text": "initiator (PCE) set /ACK signal to 1"},
{ "page": "0x000", "logical": "0xe27e", "text": "wait for target (CD) to set /REQ signal to 0"},
{ "page": "0x000", "logical": "0xe285", "text": "initiator (PCE) set /ACK signal to 0"},

{ "page": "0x000", "logical": "0xe28e", "text": "try to send command prefix $81, $ff"},
{ "page": "0x000", "logical": "0xe299", "text": "flush command buffer"},
{ "page": "0x000", "logical": "0xe2dc", "text": "get cd status"},
{ "page": "0x000", "logical": "0xe2f8", "text": "send command buffer"},

{ "page": "0x000", "logical": "0xe341", "text": "clears the 9 bytes starting at $2211"},
{ "page": "0x000", "logical": "0xe363", "text": "backup MPR 6"},
{ "page": "0x000", "logical": "0xe36d", "text": "map CDROM RAM"},
{ "page": "0x000", "logical": "0xe371", "text": "dest: $c000"},
{ "page": "0x000", "logical": "0xe379", "text": "len: 8 KBytes"},
{ "page": "0x000", "logical": "0xe384", "text": "check if the CD read is successful"},
{ "page": "0x000", "logical": "0xe388", "text": "next 8KB RAM"},
{ "page": "0x000", "logical": "0xe38a", "text": "we just read 8KB (4 sectors)"},
{ "page": "0x000", "logical": "0xe38f", "text": "repeat until we read all sectors"},
{ "page": "0x000", "logical": "0xe393", "text": "restore MPR 6"},
{ "page": "0x000", "logical": "0xe3b8", "text": "copy data to VRAM"},

{ "page": "0x000", "logical": "0xe40f", "text": "negates the number of bytes to read" },
{ "page": "0x000", "logical": "0xe412", "text": "wait until cdrom is ready" },
{ "page": "0x000", "logical": "0xe41c", "text": "data can be read" },
{ "page": "0x000", "logical": "0xe420", "text": "cd is unavailable" },
{ "page": "0x000", "logical": "0xe427", "text": "is this some write overflow test?" },
{ "page": "0x000", "logical": "0xe42d", "text": "wait ..." },
{ "page": "0x000", "logical": "0xe432", "text": "you can't read more than 8*256 bytes (a whole sector)" },
{ "page": "0x000", "logical": "0xe439", "text": "check if we read all the requested number of bytes" },
{ "page": "0x000", "logical": "0xe444", "text": "we wrote 256 bytes, so we increase the MSB of the output pointer" },
{ "page": "0x000", "logical": "0xe446", "text": "check if we read a whole sector" },

{"page": "0x000", "logical": "0xe532", "text": "unit attention"},
{"page": "0x000", "logical": "0xe536", "text": "not ready"},
{"page": "0x000", "logical": "0xe549", "text": "not ready"},
{"page": "0x000", "logical": "0xe54d", "text": "data field incorrect"},
{"page": "0x000", "logical": "0xe551", "text": "seek eerror"},
{"page": "0x000", "logical": "0xe555", "text": "header read error"},
{"page": "0x000", "logical": "0xe559", "text": "no disc"},
{"page": "0x000", "logical": "0xe55d", "text": "cover open"},
{"page": "0x000", "logical": "0xe561", "text": "not a digital audio track"},
{"page": "0x000", "logical": "0xe565", "text": "not a cdrom data track"},
{"page": "0x000", "logical": "0xe569", "text": "invalid command"},
{"page": "0x000", "logical": "0xe56d", "text": "???"},
{"page": "0x000", "logical": "0xe571", "text": "end of volume"},
{"page": "0x000", "logical": "0xe575", "text": "invalid parameter"},
{"page": "0x000", "logical": "0xe579", "text": "audio not playing"},

{ "page": "0x000", "logical": "0xe679", "text": "pause" },
{ "page": "0x000", "logical": "0xe698", "text": "read subchannel Q" },
{ "page": "0x000", "logical": "0xe738", "text": "ad_read ?" },
{ "page": "0x000", "logical": "0xe756", "text": "read" },

{ "page": "0x000", "logical": "0xe7a1", "text": "clear all bits except bits 4 and 7" },

{"page": "0x000", "logical": "0xe86b", "text": "2019 contains a copy of cd_control" },
{"page": "0x000", "logical": "0xe872", "text": "bit 2 is set : adpcm sample playback in progress / half end" },
{"page": "0x000", "logical": "0xe874", "text": "reset bit 3 of cd_control" },
{"page": "0x000", "logical": "0xe877", "text": "do the same on the shadow register" },
{"page": "0x000", "logical": "0xe87f", "text": "bit 5 is set: data transfer done?" },
{"page": "0x000", "logical": "0xe881", "text": "clear bit 5" },

{"page": "0x000", "logical": "0xe8dc", "text": "subchannel fifo something ?" },

{"page": "0x000", "logical": "0xe8f1", "text": "adpcm end reached" },

{ "page": "0x000", "logical": "0xe903", "text": "backup status register onto the stack" },
{ "page": "0x000", "logical": "0xe904", "text": "disable interrupts" },
{ "page": "0x000", "logical": "0xe905", "text": "reset process list lock" },
{ "page": "0x000", "logical": "0xe908", "text": "set the 5th entry" },
{ "page": "0x000", "logical": "0xe90a", "text": "the routine will be gx_wait_forever" },
{ "page": "0x000", "logical": "0xe916", "text": "set the routine stack offset" },
{ "page": "0x000", "logical": "0xe91b", "text": [
    "bit 0 => ??",
    "    1 => the proc execution is delayed",
    "    2 => the proc will be run",
    "    3 => ??",
    " ....",
    "    7 => \"mute\" proc"
]},
{ "page": "0x000", "logical": "0xe91e", "text": "flag or'ed after the proc is run" },
{ "page": "0x000", "logical": "0xe922", "text": "clear the rest of the proc list" },
{ "page": "0x000", "logical": "0xe93d", "text": "restore status register"},
{ "page": "0x000", "logical": "0xe93f", "text": "Count the number of process to run."},

{ "page": "0x000", "logical": "0xe94f", "text": "backup status register" },
{ "page": "0x000", "logical": "0xe950", "text": "deactivate interrupts" },
{ "page": "0x000", "logical": "0xe951", "text": "clear process delay" },
{ "page": "0x000", "logical": "0xe954", "text": "mark it for execution" },
{ "page": "0x000", "logical": "0xe959", "text": "restore status register" },

{ "page": "0x000", "logical": "0xe95b", "text": "bank: $000 logical: $e95b" },
{ "page": "0x000", "logical": "0xe95b", "text": "locl list" },
{ "page": "0x000", "logical": "0xe967", "text": "load proc address" },
{ "page": "0x000", "logical": "0xe974", "text": "stack pointer" },
{ "page": "0x000", "logical": "0xe97a", "text": "\"return\" flag" },
{ "page": "0x000", "logical": "0xe981", "text": "reset status register" },
{ "page": "0x000", "logical": "0xe986", "text": "mark the process for execution" },
{ "page": "0x000", "logical": "0xe989", "text": "go through the process list and run the first available one" },

{ "page": "0x000", "logical": "0xe98c", "text": "lock process list"},
{ "page": "0x000", "logical": "0xe991", "text": "set data pointer"},
{ "page": "0x000", "logical": "0xe996", "text": "search for the first empty entry in the process list"},
{ "page": "0x000", "logical": "0xe999", "text": "what's inside 228b and onwards?"},
{ "page": "0x000", "logical": "0xe99e", "text": "!! warning !! should be cpx?!"},
{ "page": "0x000", "logical": "0xe9a2", "text": "trigger IRQ2 => run process list ?"},
{ "page": "0x000", "logical": "0xe9aa", "text": "load proc address"},
{ "page": "0x000", "logical": "0xe9b5", "text": "stack offset"},
{ "page": "0x000", "logical": "0xe9bb", "text": "flag?"},
{ "page": "0x000", "logical": "0xe9c7", "text": "unlock process list"},

{ "page": "0x000", "logical": "0xe9d4", "text": "see if lower priority process are waiting to be run" },

{ "page": "0x000", "logical": "0xe9eb", "text": "use the last proc" },
{ "page": "0x000", "logical": "0xe9ee", "text": "backup X register" },
{ "page": "0x000", "logical": "0xe9f2", "text": "backup Y register" },
{ "page": "0x000", "logical": "0xe9f7", "text": "set delay" },
{ "page": "0x000", "logical": "0xe9fb", "text": "backup status flag" },
{ "page": "0x000", "logical": "0xe9fe", "text": "the proc address will be the return" },
{ "page": "0x000", "logical": "0xe9ff", "text": "address on the stack" },
{ "page": "0x000", "logical": "0xea0c", "text": "backup stack pointer offset" },
{ "page": "0x000", "logical": "0xea11", "text": "set flag ?" },
{ "page": "0x000", "logical": "0xea16", "text": "process IRQ2/CD proc and wait until IRQ1 is triggered" },

{ "page": "0x000", "logical": "0xea1a", "text": "save registers" },
{ "page": "0x000", "logical": "0xea1d", "text": "A" },
{ "page": "0x000", "logical": "0xea21", "text": "X" },
{ "page": "0x000", "logical": "0xea25", "text": "Y" },
{ "page": "0x000", "logical": "0xea29", "text": "status" },
{ "page": "0x000", "logical": "0xea2d", "text": "return address (LSB) " },
{ "page": "0x000", "logical": "0xea31", "text": "               (MSB)" },
{ "page": "0x000", "logical": "0xea37", "text": "save stack offset" },
{ "page": "0x000", "logical": "0xea3c", "text": "it will be run on the next pass" },
{ "page": "0x000", "logical": "0xea3f", "text": "now process the list" },
{ "page": "0x000", "logical": "0xea48", "text": "update delay" },
{ "page": "0x000", "logical": "0xea4d", "text": "run the proc when it reaches 0" },
{ "page": "0x000", "logical": "0xea5b", "text": "find the next proc to run" },

{ "page": "0x000", "logical": "0xea67", "text": "trigger IRQ2" },
{ "page": "0x000", "logical": "0xea68", "text": "enable interrupts" },
{ "page": "0x000", "logical": "0xea6b", "text": "" },
{ "page": "0x000", "logical": "0xea73", "text": "update flag" },
{ "page": "0x000", "logical": "0xea76", "text": "future Y reg" },
{ "page": "0x000", "logical": "0xea7a", "text": "stack offset" },
{ "page": "0x000", "logical": "0xea80", "text": "proc MSB" },
{ "page": "0x000", "logical": "0xea84", "text": "proc LSB" },
{ "page": "0x000", "logical": "0xea88", "text": "status register" },
{ "page": "0x000", "logical": "0xea8c", "text": "future X reg" },
{ "page": "0x000", "logical": "0xea96", "text": "future A reg" },
{ "page": "0x000", "logical": "0xea9a", "text": "jump to the proc" },

{ "page": "0x000", "logical": "0xeab3", "text": "bank: $000 logical: $eab3" },
{ "page": "0x000", "logical": "0xeab3", "text": "switch CPU to high speed mode" },
{ "page": "0x000", "logical": "0xeab4", "text": "disable interrupts" },
{ "page": "0x000", "logical": "0xeab5", "text": "clear decimal flag" },
{ "page": "0x000", "logical": "0xeab6", "text": "map I/O to the 1st memory page" },
{ "page": "0x000", "logical": "0xeaba", "text": "map RAM to the 2nd memory page" },
{ "page": "0x000", "logical": "0xeabe", "text": "clear zero page" },
{ "page": "0x000", "logical": "0xeac7", "text": "clear bss" },
{ "page": "0x000", "logical": "0xead1", "text": "bank: $000 logical: $ead1" },
{ "page": "0x000", "logical": "0xead1", "text": "disable interrupts" },
{ "page": "0x000", "logical": "0xead2", "text": "disable CPU timer" },
{ "page": "0x000", "logical": "0xead5", "text": "switch CPU to high speed mode" },
{ "page": "0x000", "logical": "0xead6", "text": "reset stack pointer" },
{ "page": "0x000", "logical": "0xead9", "text": "what is 22bf used for? " },
{ "page": "0x000", "logical": "0xeae1", "text": "map 1st ROM bank to the 6th memory page" },
{ "page": "0x000", "logical": "0xeae5", "text": "reset process list" },
{ "page": "0x000", "logical": "0xeae8", "text": "jump to main routine" },

{ "page": "0x000", "logical": "0xeaeb", "text": "reset scroll window MSB [todo]" },
{ "page": "0x000", "logical": "0xeaed", "text": "reset scroll window index" },
{ "page": "0x000", "logical": "0xeb1b", "text": "enable display (background and sprites)" },
{ "page": "0x000", "logical": "0xeb4e", "text": "disable display." },
{ "page": "0x000", "logical": "0xeb7c", "text": "vertical synchro register" },
{ "page": "0x000", "logical": "0xeb8d", "text": "vertical display register" },
{ "page": "0x000", "logical": "0xebb3", "text": "test for VRAM to SATB transfer end" },
{ "page": "0x000", "logical": "0xebbd", "text": "the source address ping/pong betweens $0800 and $0900" },
{ "page": "0x000", "logical": "0xebbf", "text": "set VRAM SATB source address" },
{ "page": "0x000", "logical": "0xebc8", "text": "test for sprites overflow " },
{ "page": "0x000", "logical": "0xebcc", "text": "?!" },
{ "page": "0x000", "logical": "0xebd1", "text": "disable sprite overflow interrupt" },
{ "page": "0x000", "logical": "0xebdc", "text": "test for vsync" },
{ "page": "0x000", "logical": "0xebe5", "text": "[todo] scroll window data pointer MSB" },
{ "page": "0x000", "logical": "0xebe7", "text": "if != 0 => scroll window update else set scroll from \"global\" values" },
{ "page": "0x000", "logical": "0xebe9", "text": "set raster counter to 0 (no hsync?)" },
{ "page": "0x000", "logical": "0xebef", "text": "set X scroll" },
{ "page": "0x000", "logical": "0xebfb", "text": "??" },
{ "page": "0x000", "logical": "0xec05", "text": "set Y scroll" },
{ "page": "0x000", "logical": "0xec26", "text": "set scroll data pointer LSB" },
{ "page": "0x000", "logical": "0xec28", "text": "reset scroll window index" },
{ "page": "0x000", "logical": "0xec31", "text": "enable sprite overflow interrupt" },

{ "page": "0x000", "logical": "0xec6f", "text": "$2038 => current hsync op         [todo] where $2036-$2038 are set?" },
{ "page": "0x000", "logical": "0xec71", "text": "$2036 => hsync op" },
{ "page": "0x000", "logical": "0xec73", "text": "$80 => end" },
{ "page": "0x000", "logical": "0xec75", "text": "0 =>  set X and Y scroll register  (values taken from hsync op)" },
{ "page": "0x000", "logical": "0xec78", "text": "1 => set X scroll register only  (values taken from hsync op)" },
{ "page": "0x000", "logical": "0xec7b", "text": "2 => set Y scroll register only (values taken from hsync op)" },
{ "page": "0x000", "logical": "0xec7e", "text": "3 => set X and Y scroll register" },
{ "page": "0x000", "logical": "0xec81", "text": "other => set control register" },
{ "page": "0x000", "logical": "0xec8d", "text": "set X and Y scroll register (same as 0)" },
{ "page": "0x000", "logical": "0xecba", "text": "set next rcr" },
{ "page": "0x000", "logical": "0xecbd", "text": "set Y scroll register" },
{ "page": "0x000", "logical": "0xeccc", "text": "set next RCR" },
{ "page": "0x000", "logical": "0xece1", "text": "set X scroll register" },
{ "page": "0x000", "logical": "0xecef", "text": "then set Y scroll register" },
{ "page": "0x000", "logical": "0xecf5", "text": "set next rcr" },
{ "page": "0x000", "logical": "0xed00", "text": "save index" },

{ "page": "0x000" , "logical": "0xed17", "text": "remap source pointer" },
{ "page": "0x000" , "logical": "0xed19", "text": "    while ptr.hi >= 0x60" },
{ "page": "0x000" , "logical": "0xed1b", "text": "        ptr.hi -= 0x20" },
{ "page": "0x000" , "logical": "0xed1d", "text": "        bank++" },
{ "page": "0x000" , "logical": "0xed27", "text": "disable sprite and background display" },
{ "page": "0x000" , "logical": "0xed37", "text": "set VRAM write pointer" },
{ "page": "0x000" , "logical": "0xed4a", "text": "write to VRAM data register" },
{ "page": "0x000" , "logical": "0xed51", "text": "$22c3.w = $22c2.w << 1" },
{ "page": "0x000" , "logical": "0xed54", "text": "Why?" },
{ "page": "0x000" , "logical": "0xed5f", "text": "save mpr #2 to $22c8" },
{ "page": "0x000" , "logical": "0xed64", "text": "save mpr #3 to $22c9" },
{ "page": "0x000" , "logical": "0xed69", "text": "map $22c7 to mpr #2 and the next one to mpr #3" },
{ "page": "0x000" , "logical": "0xed71", "text": "1st byte : bloc count ?" },
{ "page": "0x000" , "logical": "0xed76", "text": "$203a.w += 1" },

{ "page": "0x000", "logical": "0xed85", "text": "VDC Control register" },
{ "page": "0x000", "logical": "0xed8c", "text": "set auto increment to 1" },
{ "page": "0x000", "logical": "0xed95", "text": "set VRAM write pointer" },
{ "page": "0x000", "logical": "0xed9c", "text": "VRAM address LSB" },
{ "page": "0x000", "logical": "0xeda2", "text": "VRAM address MSB" },
{ "page": "0x000", "logical": "0xeda8", "text": "write to VRAM data register" },
{ "page": "0x000", "logical": "0xedaf", "text": "save mpr #2 to $22c8" },
{ "page": "0x000", "logical": "0xedb4", "text": "save mpr #3 to $22c9" },
{ "page": "0x000", "logical": "0xedb9", "text": " map $22c7 to mpr #2 and the next one to mpr #3" },
{ "page": "0x000", "logical": "0xedcb", "text": "remap pointer " },
{ "page": "0x000", "logical": "0xeddc", "text": "this is some kind of control byte?" },
{ "page": "0x000", "logical": "0xedde", "text": "$ff: end of data stream?" },
{ "page": "0x000", "logical": "0xede4", "text": "bit 7 cleared" },
{ "page": "0x000", "logical": "0xede8", "text": "bit 6 cleared" },
{ "page": "0x000", "logical": "0xee66", "text": "looks like some RLE encoding?" },
{ "page": "0x000", "logical": "0xeea5", "text": "RLE encoding but with a word?" },
{ "page": "0x000", "logical": "0xeed7", "text": "raw data copy?" },

{ "page": "0x000", "logical": "0xf03c", "text": "BAT size: 32x64"},
{ "page": "0x000", "logical": "0xf03f", "text": "horizontal resolution: 256px"},

{ "page": "0x000", "logical": "0xf04f", "text": "blur edges + 5MHz dot clock" },
{ "page": "0x000", "logical": "0xf053", "text": "blur edges + 7MHz dot clock" },
{ "page": "0x000", "logical": "0xf058", "text": "clear all palette colors" },
{ "page": "0x000", "logical": "0xf05b", "text": "well... there's only 512 color entries" },
{ "page": "0x000", "logical": "0xf05e", "text": "but this loops set 4*256=1024 colors to 0." },

{ "page": "0x000", "logical": "0xf091", "text": "VDC control register" },
{ "page": "0x000", "logical": "0xf09a", "text": "Clear out r/w address auto increment" },
{ "page": "0x000", "logical": "0xf09c", "text": "and fetch it from a table" },

{ "page": "0x000" , "logical": "0xf104", "text": "Vertical Display Register" },
{ "page": "0x000" , "logical": "0xf117", "text": "Vertical Synchro Register" },
{ "page": "0x000" , "logical": "0xf12a", "text": "Vertical Display End Position Register" },
{ "page": "0x000" , "logical": "0xf13d", "text": "VRAM data register" },

{ "page": "0x000", "logical": "0xf145", "text": "set VRAM auto-increment to 1." },
{ "page": "0x000", "logical": "0xf149", "text": "set VRAM write pointer to $0000" },
{ "page": "0x000", "logical": "0xf154", "text": "switch to VRAM data register" },
{ "page": "0x000", "logical": "0xf15d", "text": "$0800 = 32*64" },

{ "page": "0x000", "logical": "0xf180", "text": "disable IRQ1 and IRQ2" },
{ "page": "0x000", "logical": "0xf185", "text": "VDC control register" },

{ "page": "0x000", "logical": "0xf59f", "text": "Load char?" },
{ "page": "0x000", "logical": "0xf5a1", "text": "stop if A equals 0" },
{ "page": "0x000", "logical": "0xf5a1", "text": "loop until Y >= 128" },

{ "page": "0x000", "logical": "0xf5aa", "text": "backup A" },
{ "page": "0x000", "logical": "0xf5ab", "text": "A = A>>4" },

{ "page": "0x000", "logical": "0xf5fA", "text": "compute BAT address = (A*64) + X" },
{ "page": "0x000", "logical": "0xf602", "text": "$01 = high(A*64)" },
{ "page": "0x000", "logical": "0xf607", "text": "$00 = low(A*64) | X" },
{ "page": "0x000", "logical": "0xf609", "text": "set VRAM MAWR register" },
{ "page": "0x000", "logical": "0xf61a", "text": "switch to VRAM Data Register" },

{ "page": "0x000", "logical": "0xf8a4", "text": "reset cdrom drive" },
{ "page": "0x000", "logical": "0xf8ad", "text": "add the menu to process list" },
{ "page": "0x000", "logical": "0xf8c7", "text": "check if the game is running on a Super CDRom 2" },
{ "page": "0x000", "logical": "0xf8d5", "text": "this is a Super CDRom 2" },
{ "page": "0x000", "logical": "0xf8df", "text": "Super CDROM 2 has 64 KB of extra RAM starging at segment $80" },
{ "page": "0x000", "logical": "0xf8e1", "text": "and 192 KB starting at $64" },
{ "page": "0x000", "logical": "0xf8e4", "text": "so there's a total of 256KB of extram (32x8KB)" },
{ "page": "0x000", "logical": "0xf8eb", "text": "here it assumes it is an IFU-30 (weird things will happen on a stock pcengine) " },
{ "page": "0x000", "logical": "0xf8ed", "text": "extra work RAM starts at segment $80" },
{ "page": "0x000", "logical": "0xf8f2", "text": "and it's 64 KB (8x8KB)" },
{ "page": "0x000", "logical": "0xf942", "text": "search for \"BOOT.BIN\" file" },
{ "page": "0x000", "logical": "0xf94f", "text": "search and try to load \"BOOT.BIN\"" },
{ "page": "0x000", "logical": "0xf954", "text": "\"BOOT.BIN\" was not found" },
{ "page": "0x000", "logical": "0xf96b", "text": "jump to \"BOOT.BIN\"" },
{ "page": "0x000", "logical": "0xf972", "text": "display error message" },
{ "page": "0x000", "logical": "0xf975", "text": "\"reset\" after a while" },

{ "page": "0x000", "logical": "0xf99a", "text": "fill 2791 to 27a1 with ff" },
{ "page": "0x000", "logical": "0xf9ab", "text": "sprite collision + scanline interrupt = ON, vertical blanking interrupt = OFF" },
{ "page": "0x000", "logical": "0xf9b9", "text": "VRAM write pointer" },
{ "page": "0x000", "logical": "0xf9c1", "text": "set VRAM write pointer to SATB" },
{ "page": "0x000", "logical": "0xf9c5", "text": "VRAM data register" },
{ "page": "0x000", "logical": "0xf9cf", "text": "clear whole SATB entries" },
{ "page": "0x000", "logical": "0xf9df", "text": "32 bytes = 1 SATB entry" },

{ "page": "0x000", "logical": "0xf9ef", "text": "while A >= 16" },
{ "page": "0x000", "logical": "0xf9f1", "text": "  A >>= 1" },

{ "page": "0x000", "logical": "0xfa69", "text": "set VRAM write pointer" },
{ "page": "0x000", "logical": "0xfa74", "text": "SATB is alternatively set between $0800 and $0900." },
{ "page": "0x000", "logical": "0xfa82", "text": "set VRAM write latch" },
          
{ "page": "0x000", "logical": "0xfb04", "text": "entry count" },
{ "page": "0x000", "logical": "0xfb0a", "text": "set VRAM write pointer" },
{ "page": "0x000", "logical": "0xfb0a", "text": "set VRAM write pointer" },
{ "page": "0x000", "logical": "0xfb14", "text": "Y LSB" },
{ "page": "0x000", "logical": "0xfb1d", "text": "Y MSB" },
{ "page": "0x000", "logical": "0xfb27", "text": "X LSB" },
{ "page": "0x000", "logical": "0xfb30", "text": "X MSB" },
{ "page": "0x000", "logical": "0xfb39", "text": "Pattern address MSB" },
{ "page": "0x000", "logical": "0xfb42", "text": "Pattern address LSB" },
{ "page": "0x000", "logical": "0xfb4c", "text": "Palette index + priority" },
{ "page": "0x000", "logical": "0xfb52", "text": "Width + horizontal flip + height + vertical flip" },

{ "page": "0x000", "logical": "0xfbf8", "text": "load ?? lsb to $204e" },
{ "page": "0x000", "logical": "0xfbfd", "text": "load ?? msb to $204f" },
{ "page": "0x000", "logical": "0xfc03", "text": "load ?? to $27b7" },
{ "page": "0x000", "logical": "0xfc0a", "text": "load ?? to $27b3" },
{ "page": "0x000", "logical": "0xfc10", "text": "load ?? to $27b4" },

{ "page": "0x000", "logical": "0xfce6", "text": "remap pointer" },
{ "page": "0x000", "logical": "0xfcec", "text": "next page/bank" },
{ "page": "0x000", "logical": "0xfcf3", "text": "save mpr 2" },
{ "page": "0x000", "logical": "0xfcf8", "text": "save mpr 3" },
{ "page": "0x000", "logical": "0xfcfd", "text": "map source page to mpr 2 and 3" },
{ "page": "0x000", "logical": "0xfd05", "text": "$27b8 = [$54]" },
{ "page": "0x000", "logical": "0xfd07", "text": "encoded sequence count" },
{ "page": "0x000", "logical": "0xfd0a", "text": "increment source pointer" },
{ "page": "0x000", "logical": "0xfd11", "text": "remap source pointer if nedeed" },
{ "page": "0x000", "logical": "0xfd26", "text": "$ff: empty sequence" },
{ "page": "0x000", "logical": "0xfd2a", "text": "raw copy or incremental sequence" },
{ "page": "0x000", "logical": "0xfd2e", "text": "the data is rle encoded (either word or byte)" },
{ "page": "0x000", "logical": "0xfd33", "text": "increment source pointer" },
{ "page": "0x000", "logical": "0xfd3c", "text": "loop until there is something to decode" },
{ "page": "0x000", "logical": "0xfd3e", "text": "restore mpr 2" },
{ "page": "0x000", "logical": "0xfd43", "text": "restore mpr 3" },
{ "page": "0x000", "logical": "0xfd4d", "text": "count" },
{ "page": "0x000", "logical": "0xfd50", "text": "incremement source pointer" },
{ "page": "0x000", "logical": "0xfd5f", "text": "update destination pointer (dest += count)" },
{ "page": "0x000", "logical": "0xfd69", "text": "update source pointer (src += count)" },
{ "page": "0x000", "logical": "0xfd78", "text": "count" },
{ "page": "0x000", "logical": "0xfd7b", "text": "value" },
{ "page": "0x000", "logical": "0xfd84", "text": "move source pointer past count+value" },
{ "page": "0x000", "logical": "0xfd91", "text": "update destination pointer (dest += count)" },
{ "page": "0x000", "logical": "0xfd9e", "text": "count" },
{ "page": "0x000", "logical": "0xfda3", "text": "sequence start lsb" },
{ "page": "0x000", "logical": "0xfda8", "text": "sequence start msb" },
{ "page": "0x000", "logical": "0xfdac", "text": "source pointer += 3" },
{ "page": "0x000", "logical": "0xfdba", "text": "[destination] = sequence++" },
{ "page": "0x000", "logical": "0xfdce", "text": "update destination pointer (dest += 2*count)" },
{ "page": "0x000", "logical": "0xfddb", "text": "count" },
{ "page": "0x000", "logical": "0xfdde", "text": "value lsb" },
{ "page": "0x000", "logical": "0xfde5", "text": "value msb" },
{ "page": "0x000", "logical": "0xfdea", "text": "move pointer past count+value" },
{ "page": "0x000", "logical": "0xfdf6", "text": "copy X times the word to destination" },
{ "page": "0x000", "logical": "0xfe04", "text": "update destination pointer (dest += 2*count)" },

{ "page": "0x000", "logical": "0xfe12", "text": "add 2047 to the 32 bit value" },
{ "page": "0x000", "logical": "0xfe26", "text": "multiply by 32" },
{ "page": "0x000", "logical": "0xfe33", "text": "as 2048*32 = 65536, getting the 2 upper bytes will give us the sector count" },

{ "page": "0x000", "logical": "0xfe4c", "text": "sector mid ?" },
{ "page": "0x000", "logical": "0xfe4f", "text": "sector hi ?" },
{ "page": "0x000", "logical": "0xfe54", "text": "sector lo ?" },
{ "page": "0x000", "logical": "0xfe59", "text": "sector count ?" },
{ "page": "0x000", "logical": "0xfe5c", "text": "read sector routine ?" },
{ "page": "0x000", "logical": "0xfe61", "text": "check for primary volume descriptor identifier" },
{ "page": "0x000", "logical": "0xfe6f", "text": "location of the extent (LBA) (little endian)." },
{ "page": "0x000", "logical": "0xfe76", "text": "data length (size of the extent) (little endian)" },
{ "page": "0x000", "logical": "0xfe7d", "text": "byte size to sector count?" },
{ "page": "0x000", "logical": "0xfe88", "text": "read root dir extent (trk: 1, off: 14h, cnt: 1)" },
{ "page": "0x000", "logical": "0xfe9b", "text": "load all entries and keep a copy in RAM" },

{ "page": "0x001", "logical": "0xc003", "text": "reset scrolling coordinates" },
{ "page": "0x001", "logical": "0xc00b", "text": "upload complete palette (all 512 colors)" },
{ "page": "0x001", "logical": "0xc019", "text": "set vram r/w auto increment to 1" },
{ "page": "0x001", "logical": "0xc01c", "text": "VRAM write pointer set to $0000 (BAT)" },
{ "page": "0x001", "logical": "0xc027", "text": "copy the whole BAT" },
{ "page": "0x001", "logical": "0xc037", "text": "bank: $01" },
{ "page": "0x001", "logical": "0xc041", "text": "VRAM destination: $1000" },
{ "page": "0x001", "logical": "0xc04a", "text": "source: $4d5f" },

{ "page": "0x001", "logical": "0xc05c", "text":  "make the error message blink for 5 seconds (10 * (10 + 20) frames)" },
{ "page": "0x001", "logical": "0xc064", "text":  "wait for 10 frames" },
{ "page": "0x001", "logical": "0xc072", "text":  "update SATB" },
{ "page": "0x001", "logical": "0xc077", "text":  "wait for 20 frames" },
{ "page": "0x001", "logical": "0xc087", "text":  "wait for run button o be pressed." },
{ "page": "0x001", "logical": "0xc08a", "text":  "get joypad 0 state" },
{ "page": "0x001", "logical": "0xc08d", "text":  "check if RUN bit is set" },
{ "page": "0x001", "logical": "0xc0b1", "text":  "c0f2 (set a disk)" },
{ "page": "0x001", "logical": "0xc0b7", "text":  "update SATB" },
{ "page": "0x001", "logical": "0xc0ba", "text":  "wait 30 frames" },
{ "page": "0x001", "logical": "0xc0c5", "text":  "c10b (and)" },
{ "page": "0x001", "logical": "0xc0ce", "text":  "wait 30 frames" },
{ "page": "0x001", "logical": "0xc0d9", "text":  "c11c (push run button)" },
{ "page": "0x001", "logical": "0xc0e2", "text":  "wait 30 frames" },
{ "page": "0x001", "logical": "0xc0ea", "text":  "wait 20 frames" },

{ "page": "0x001", "logical": "0xc0f2", "text": "3 SATB entries" },
{ "page": "0x001", "logical": "0xc0f3", "text": "entry #0: Y LSB (208)" },
{ "page": "0x001", "logical": "0xc0f4", "text": "          Y MSB" },
{ "page": "0x001", "logical": "0xc0f5", "text": "          X LSB (48)" },
{ "page": "0x001", "logical": "0xc0f6", "text": "          X MSB" },
{ "page": "0x001", "logical": "0xc0f7", "text": "          Pattern address MSB ($280 => $5000)" },
{ "page": "0x001", "logical": "0xc0f8", "text": "          Pattern address LSB" },
{ "page": "0x001", "logical": "0xc0f9", "text": "          Palette index (0) + prioriry (foreground) " },
{ "page": "0x001", "logical": "0xc0fa", "text": "          Width (32) + horizontal flip (normal) + height (64) + vertical flip (normal)" },
{ "page": "0x001", "logical": "0xc0fb", "text": "entry #1  (Y: 208)" },
{ "page": "0x001", "logical": "0xc0fd", "text": "          (X: 80)" },
{ "page": "0x001", "logical": "0xc0ff", "text": "          (Pattern: $2a0)" },
{ "page": "0x001", "logical": "0xc101", "text": "          (Pal: 0, Pri: foreground)" },
{ "page": "0x001", "logical": "0xc102", "text": "          (W: 32, HFlip: normal, H:64, VFlip: Normal)" },
{ "page": "0x001", "logical": "0xc103", "text": "entry #2  (Y: 208)" },
{ "page": "0x001", "logical": "0xc105", "text": "          (X: 112)" },
{ "page": "0x001", "logical": "0xc107", "text": "          (Pattern: $2c0)" },
{ "page": "0x001", "logical": "0xc109", "text": "          (Pal: 0, Pri: foreground)" },
{ "page": "0x001", "logical": "0xc10a", "text": "          (W: 16, HFlip: normal, H:64, VFlip: Normal)" },
{ "page": "0x001", "logical": "0xc10b", "text": "2 SATB entries" },
{ "page": "0x001", "logical": "0xc10c", "text": "entry #0  (Y: 240)" },
{ "page": "0x001", "logical": "0xc10e", "text": "          (X: 128)" },
{ "page": "0x001", "logical": "0xc110", "text": "          (Pattern: $2c2)" },
{ "page": "0x001", "logical": "0xc112", "text": "          (Pal: 0, Pri: foreground)" },
{ "page": "0x001", "logical": "0xc113", "text": "          (W: 16, HFlip: normal, H:32, VFlip: Normal)" },
{ "page": "0x001", "logical": "0xc114", "text": "entry #1  (Y: 240)" },
{ "page": "0x001", "logical": "0xc116", "text": "          (X: 144)" },
{ "page": "0x001", "logical": "0xc118", "text": "          (Pattern: $2e0)" },
{ "page": "0x001", "logical": "0xc11a", "text": "          (Pal: 0, Pri: foreground)" },
{ "page": "0x001", "logical": "0xc11b", "text": "          (W: 32, HFlip: normal, H:32, VFlip: Normal)" },
{ "page": "0x001", "logical": "0xc11c", "text": "3 SATB entries" },
{ "page": "0x001", "logical": "0xc11d", "text": "entry #0  (Y: 208)" },
{ "page": "0x001", "logical": "0xc11f", "text": "          (X: 160)" },
{ "page": "0x001", "logical": "0xc121", "text": "          (Pattern: $290)" },
{ "page": "0x001", "logical": "0xc123", "text": "          (Pal: 0, Pri: foreground)" },
{ "page": "0x001", "logical": "0xc124", "text": "          Width (32) + horizontal flip (normal) + height (64) + vertical flip (normal)" },
{ "page": "0x001", "logical": "0xc125", "text": "entry #1  (Y: 208)" },
{ "page": "0x001", "logical": "0xc127", "text": "          (X: 192)" },
{ "page": "0x001", "logical": "0xc129", "text": "          (Pattern: $2b0)" },
{ "page": "0x001", "logical": "0xc12b", "text": "          (Pal: 0, Pri: foreground)" },
{ "page": "0x001", "logical": "0xc12c", "text": "          Width (32) + horizontal flip (normal) + height (64) + vertical flip (normal)" },
{ "page": "0x001", "logical": "0xc12d", "text": "entry #2  (Y: 208)" },
{ "page": "0x001", "logical": "0xc12f", "text": "          (X: 224)" },
{ "page": "0x001", "logical": "0xc131", "text": "          (Pattern: $2d0)" },
{ "page": "0x001", "logical": "0xc133", "text": "          (Pal: 0, Pri: foreground)" },
{ "page": "0x001", "logical": "0xc134", "text": "          Width (32) + horizontal flip (normal) + height (64) + vertical flip (normal)" },
{ "page": "0x001", "logical": "0xc135", "text": "??" },

{ "page": "0x001", "logical": "0xc136", "text": "5 SATB entries" },
{ "page": "0x001", "logical": "0xc137", "text": "entry #0  (Y: 160)" },
{ "page": "0x001", "logical": "0xc139", "text": "          (X: 80)" },
{ "page": "0x001", "logical": "0xc13b", "text": "          (Pattern: $2e8)" },
{ "page": "0x001", "logical": "0xc13d", "text": "          (Pal: 0, Pri: foreground)" },
{ "page": "0x001", "logical": "0xc13e", "text": "          (W: 32, HFlip: normal, H:32, VFlip: Normal)" },
{ "page": "0x001", "logical": "0xc13f", "text": "entry #1  (Y: 160)" },
{ "page": "0x001", "logical": "0xc141", "text": "          (X: 112)" },
{ "page": "0x001", "logical": "0xc143", "text": "          (Pattern: $2f0)" },
{ "page": "0x001", "logical": "0xc145", "text": "          (Pal: 0, Pri: foreground)" },
{ "page": "0x001", "logical": "0xc146", "text": "          (W: 32, HFlip: normal, H:32, VFlip: Normal)" },
{ "page": "0x001", "logical": "0xc147", "text": "entry #2  (Y: 160)" },
{ "page": "0x001", "logical": "0xc149", "text": "          (X: 144)" },
{ "page": "0x001", "logical": "0xc14b", "text": "          (Pattern: $2f0)" },
{ "page": "0x001", "logical": "0xc14d", "text": "          (Pal: 0, Pri: foreground)" },
{ "page": "0x001", "logical": "0xc14e", "text": "          (W: 32, HFlip: normal, H:32, VFlip: Normal)" },
{ "page": "0x001", "logical": "0xc14f", "text": "entry #3  (Y: 160)" },
{ "page": "0x001", "logical": "0xc151", "text": "          (X: 176)" },
{ "page": "0x001", "logical": "0xc153", "text": "          (Pattern: $2f8)" },
{ "page": "0x001", "logical": "0xc155", "text": "          (Pal: 0, Pri: foreground)" },
{ "page": "0x001", "logical": "0xc156", "text": "          (W: 32, HFlip: normal, H:32, VFlip: Normal)" },
{ "page": "0x001", "logical": "0xc157", "text": "entry #4  (Y: 160)" },
{ "page": "0x001", "logical": "0xc159", "text": "          (X: 208)" },
{ "page": "0x001", "logical": "0xc15c", "text": "          (Pattern: $2f0)" },
{ "page": "0x001", "logical": "0xc15d", "text": "          (Pal: 0, Pri: foreground)" },
{ "page": "0x001", "logical": "0xc15e", "text": "          (W: 32, HFlip: normal, H:32, VFlip: Normal)" }

]