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[script] load_rom_screen, setup_sprite, & draw_debug_sprites 

- Added comments for setup_sprite
- Renamed draw_string_sprites to draw_debug_sprites and added comments.
- Discovered load_rom_screen (opcode 0xA1)
This commit is contained in:
Zorchenhimer 2025-10-26 18:57:41 -04:00
parent 37711fa4bb
commit 31b297b2e0
Signed by: Zorchenhimer
GPG Key ID: 70A1AB767AAB9C20
1 changed files with 31 additions and 2 deletions
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33
script/instructions.go
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@ -69,7 +69,25 @@ var Instructions []*Instruction = []*Instruction{
&Instruction{ 0x9F, 6, 0, 0, false, ""},
&Instruction{ 0xA0, 2, 0, 1, false, ""},
&Instruction{ 0xA1, 1, 0, 0, false, ""},
// Draw a screen from ROM.
// ArgA is screen index (ArgA <= 14)
// 00 - Window (used as the unit screens in the english tapes)
// 01 - bricks??
// 02 - Notebook (used for the mid-lesson quizes in the english tapes)
// 03 - Blimp (used after english lessons, before Gold Tomahawk)
// 04 - Map of USA (used in english tapes before final quiz)
// 05 - Green rounded title card (used in math/science)
// 06 - Orange rounded title card (used in math/science)
// 07 - Blue Triangle title card (used in a math tape)
// 08 - Blue Sci-fi title card (used in science tapes)
// 09 - Green block border (from here on don't seem to be used)
// 0A - Generic brick border
// 0B - Generic twist border
// 0C - Generic yellow embossed border
// 0D - Generic blue diamond border
// 0E - Generic brownish border
&Instruction{ 0xA1, 1, 0, 0, false, "load_rom_screen"},
&Instruction{ 0xA2, 1, 0, 0, false, "buffer_palette"},
// Possibly a sprite setup routine. loads up some CHR data and some palette
@ -194,6 +212,14 @@ var Instructions []*Instruction = []*Instruction{
&Instruction{ 0xE0, 2, 0, 1, false, "modulo"},
&Instruction{ 0xE1, 4, 0, 0, false, ""},
// ArgA: Palette ID
// ArgB: FG palette index
// ArgC: BG palette index
// ArgD: Priority (something else too?)
// ArgE: X coord
// ArgF: Y coord
// ArgG: ??
&Instruction{ 0xE2, 7, 0, 0, false, "setup_sprite"},
// Pops a word off the stack, uses it as a pointer, and pushes the byte
@ -229,7 +255,10 @@ var Instructions []*Instruction = []*Instruction{
// ArgD: Priority (something else too?)
// ArgE: X coord
// ArgF: Y coord
&Instruction{ 0xEF, 6, 0, 0, false, "draw_string_sprites"},
// THIS WORD WRAPS APPARENTLY?????
// Duplicate tiles are ignored and not displayed. However, space is left
// for them as if they were. Word wrapping adds 17 to the Y offset.
&Instruction{ 0xEF, 6, 0, 0, false, "draw_debug_sprites"},
&Instruction{ 0xF0, 0, 0, 0, false, "disable_sprites"},
&Instruction{ 0xF1, 4, 0, 0, false, ""},