joeldipops / supertestboy

Companion project to TransferBoy. The goal being to comprehensively test each SuperGameBoy command.

SuperTestBoy

Companion project to TransferBoy. The goal being to comprehensively test each SuperGameBoy command.

Testable Commands

• PAL01, PAL23, PAL12, PAL03 - Set the seven colours per command by setting a high bits low libbles for the RGBs of each colour.
• MASK_EN - Can choose whether to Freeze, Black-out or Colour-out the screen. Pressing any key after masking unmacks

In-progress Commands

• MLT_REQ - Can send the command for 1, 2 or 4 player mode, but doesn't seem to be working properly in BGB. No way to test if command was succesful.
• PCT_TRN - Sends the packets successfully, but haven't set up any data, so just overlays the screen with junk.
• Initialisation packet - I can't recall what this does or if there's any way to test it, but I read somewhere that it's a thing, and SuperTestBoy will send it if you want it to.

Coming soon/next

• ATTR_LIN - SO I can exercise all the palettes set up by the PALpq commands
• PAL_PRI - Cos it should be easy

supertestboy's Issues

Move strings.asm to assets folder

Fix obvious performance pitfalls

• Replace any rl A, rrc A type instructions with their intended counterparts rla, rrca

• Possibly use $dfff as the stack base and HRAM for local vars?

Put some PCT_TRN data in the right place

Add a proper makefile

Eh?

all:
rgbasm -o main.o main.asm
rgblink -o SuperTestBoy.gb main.o
rgbfix -v -p 0 SuperTestBoy.gb

use rst $38 as my error handler rather than rst $00 as the op code is $ff

It's a nicer value to pad the cartridge with

Improve main menu jump table pattern.

I wanted to avoid the callees jp-ing back to the the end of the table rather than using ret, which is why I have those calls and all that ugly padding. But I realised that I can still use ret as long as the right address is on the stack so something like:

ld HL, .return
push HL
jr regWithAddressInTable
; table start
    jp menuItem1
    jp menuItem2
.return
    ret

A and B buttons are switched (at least in Transfer Boy?)