102 lines
No EOL
2.5 KiB
JSON
102 lines
No EOL
2.5 KiB
JSON
{
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"_comment": "Structure of the title picture, which the boot loader displays while the game loads.",
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"unitLabels": {
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"boot/titleColorRam9800": {
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"9800": "titleColorRam",
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"9BE8": "titleColorRamPadding"
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},
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"boot/titleScreenRam9C00": {
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"9C00": "titleScreenRam",
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"9FE8": "titleScreenRamPadding"
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},
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"boot/titleBitmapA000": {
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"A000": "titleBitmap",
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"BF40": "titleBitmapPadding"
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}
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},
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"notes": {
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"9800": {
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"unit": "boot/titleColorRam9800",
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"block": [
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"titleColorRam - 1000 bytes, one per character cell of the 40x25 screen, copied to $D800-$DBE7 by",
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"bootShowTitlePicture. In multicolour bitmap mode the low nibble of each byte gives the colour of",
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"the %11 pixel pairs in that cell. One screen row of 40 cells per line below."
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]
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},
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"9BE8": {
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"unit": "boot/titleColorRam9800",
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"block": [
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"Padding to the end of the page; not copied to colour RAM."
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]
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},
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"9C00": {
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"unit": "boot/titleScreenRam9C00",
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"block": [
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"titleScreenRam - 1000 bytes, one per character cell, copied to $8C00 by bootShowTitlePicture",
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"(with $D018 = $38 and VIC bank 2 the video matrix sits at $8C00). In multicolour bitmap mode the",
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"high nibble gives the colour of the %01 pixel pairs and the low nibble that of the %10 pairs.",
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"One screen row of 40 cells per line below."
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]
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},
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"9FE8": {
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"unit": "boot/titleScreenRam9C00",
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"block": [
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"Padding to the end of the page; not part of the video matrix."
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]
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},
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"A000": {
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"unit": "boot/titleBitmapA000",
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"block": [
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"titleBitmap - 8000 bytes of multicolour bitmap, stored the way the VIC reads it: 25 rows of 40",
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"character cells, 8 consecutive bytes per cell (one byte per pixel row of that cell), so each line",
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"below is one 8x8 cell. Every byte holds four 2-bit pixels: 00 takes the background colour $D021,",
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"01 and 10 take the two nibbles of titleScreenRam and 11 takes the low nibble of titleColorRam.",
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"docs/titleScreen.png is this data decoded."
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]
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},
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"BF40": {
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"unit": "boot/titleBitmapA000",
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"block": [
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"Padding after the 8000 bitmap bytes, to the end of the loaded file at $BFFF."
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]
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}
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},
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"unitDataTypes": {
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"boot/titleColorRam9800": {
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"9800": [
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"grid",
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1000,
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40
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],
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"9BE8": [
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"grid",
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24,
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24
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]
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},
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"boot/titleScreenRam9C00": {
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"9C00": [
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"grid",
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1000,
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40
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],
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"9FE8": [
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"grid",
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24,
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24
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]
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},
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"boot/titleBitmapA000": {
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"A000": [
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"grid",
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8000,
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8
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],
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"BF40": [
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"grid",
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192,
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24
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]
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}
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}
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} |