gameboy-tests

Simple tests used to check some areas of rusty-boi

Current Tests:

interrupts_full:

Checks if interrupts are being triggered and serviced. This test doesn't visually fail, but rather loops infinitely in case an interrupt is not triggered. The test stages are:

1. VBlank:

• Nothing fancy. Will hang if the individual VBlank interrupt (bit 0 on IE/IF) is not triggered.

2. LCD Status:

• LY Coincidence: Enabled by setting bit 6 on LCDC Stat ($FF41). Gets triggered when LYC ($FF45) is equal to LY ($FF44) and the Coincidence Flag is set (bit 2 in STAT).
• Mode 2/OAM: Enabled by settings bit 5 on LCDC Stat ($FF41). Gets triggered when the video chip enters OAM Scan mode.
• Mode 1/V-Blank: Enabled by settings bit 4 on LCDC Stat ($FF41). Gets triggered when the video chip enters V-Blank mode. It's not the same as the V-Blank interrupt.
• Mode 0/H-Blank: Enabled by settings bit 3 on LCDC Stat ($FF41). Gets triggered when the video chip enters H-Blank mode.

3. Timer:

• 4096 Hz: Triggered when the TIMA register ($FF05) overflows with timer frequency set to 4096 Hz (bits 0 and 1 are reset on TAC - $FF07).
• 262144 Hz: Triggered when the TIMA register ($FF05) overflows with timer frequency set to 262144 Hz (bits 0 is set and 1 is reset on TAC - $FF07).
• 65536 Hz: Triggered when the TIMA register ($FF05) overflows with timer frequency set to 65536 Hz (bits 0 is reset and 1 is set on TAC - $FF07).
• 16384 Hz: Triggered when the TIMA register ($FF05) overflows with timer frequency set to 16384 Hz (bits 0 and 1 are set on TAC - $FF07).