1 section "end",HOME[1024]
8 section "vbl",HOME[$40]
11 section "lcdc",HOME[$48]
14 section "tmro",HOME[$50]
24 ld a, $04 ;start timer, 4.096KHz
51 db $0D,$0A,$1B,"[1mFPGABoy Diagnostic ROM",$1B,"[0m",$0D,$0A,0
61 ld hl, $8000 ; Copy two tiles.
183 ; Memory tester: writes h ^ l to all addresses from C000 to DF80.
188 ld hl, $C000 ; Write loop
200 ld hl, $C000 ; Read loop
216 ld hl, testokstr ; Say we're OK
219 .memfail: ; Say we failed (sadface)
220 ; decrement hl the easy way
236 db "Testing memory from $C000 to $DF80...",0
240 db " Test failed at $",0
242 puthex: ; Put two hex nibbles to the serial console.
257 ; Wait for switches to be flipped on and off again.
281 db "Diagnostic ROM complete; flip switches to nonzero and then to zero to reset. Expect A.",$0D,$0A,0
283 ; Core instruction basic acceptance tests.
357 ld hl, .dinocausefail
358 ld c, $0F ; First, wait until an interrupt happens...
363 ei ; Now make sure that an IRQ didn't happen on EI/DI
370 ei ; Make sure that an IRQ does happen on EI/NOP/DI
390 db "Testing instructions... ",0
408 db "DI/EI does not cause interrupt",0
410 db "DI/NOP/EI cause interrupt",0
412 db " test failed.",$0D,$0A,0
416 ; Serial port manipulation functions.