X-Git-Url: http://git.joshuawise.com/fpgaboy.git/blobdiff_plain/7e4f4505e544aaefc0fb3f6d9cd50fcdffc6f677..39a68cde9f2a76dabfcc9d7654f212ad1d7b356a:/diag.asm?ds=inline diff --git a/diag.asm b/diag.asm index 786052e..7f06de0 100644 --- a/diag.asm +++ b/diag.asm @@ -1,16 +1,30 @@ - SECTION "a",HOME + section "end",HOME[1024] + nop + + SECTION "a",HOME[$00] + +start: jp main + + section "vbl",HOME[$40] + jp vbl + + section "lcdc",HOME[$48] + jp lcdc + + section "tmro",HOME[$50] + jp tmro main: - ld c, $51 ; Note that we are alive. ld a, $FF - ld [c],a - + ld c, $51 + ld [c], a + ld sp, $DFF0 - ld c, $07 ld a, $04 ;start timer, 4.096KHz + ld c, $07 ld [c], a - + ld hl, $DF81 xor a ld [hli], a @@ -18,6 +32,8 @@ main: ld hl, signon call puts + + call putscreen ei @@ -34,29 +50,82 @@ main: signon: db $0D,$0A,$1B,"[1mFPGABoy Diagnostic ROM",$1B,"[0m",$0D,$0A,0 - section "fuq",HOME[$100] -irqhand: +putscreen: + ld a, $FF ; Copy two tiles. + ld hl, $8000 + ld [hli], a + ld [hli], a + xor a + ld [hli], a + ld [hli], a + + ld hl, $9800 +.loop: ld a, $FF + ld [hli], a + xor a + ld [hli], a + ld a, h + cp $9C + jp nz,.loop + ret + +vbl: PUSH AF PUSH BC PUSH DE PUSH HL xor a - ld c, $0F ; ack the irq + ld [$FF0F], a + + ld c, $42 ; SCY + ld a, [c] + inc a ld [c], a + + POP HL + POP DE + POP BC + POP AF + + RETI + +lcdc: + PUSH AF + PUSH BC + + xor a + ld [$FF0F], a + + POP BC + POP AF + + reti + +tmro: + PUSH AF + PUSH BC + PUSH DE + PUSH HL + + xor a + ld [$FF0F], a - ld hl, $DF82 - ld a, [hld] + ld c, $45 ; LYC + ld a, [c] + inc a + ld [c], a + + ld a, [$DF82] cp 0 jr z, .noprint ld a, $41 ; print A call putc .noprint: - ld a, [hl] - add 1 - ld c, $51 - ld [c], a - ld [hl], a + ld a, [$DF81] + inc a + ld [$DF81], a + ld [$FF51], a POP HL POP DE @@ -69,7 +138,7 @@ memtest: ld hl,memteststr call puts - ld hl, $C001 ; Write loop + ld hl, $C000 ; Write loop .wr: ld a,h xor l @@ -81,7 +150,7 @@ memtest: cp $80 jr nz, .wr - ld hl, $C001 ; Read loop + ld hl, $C000 ; Read loop .rd: ld a,h xor l @@ -102,7 +171,7 @@ memtest: ret .memfail: ; Say we failed (sadface) ; decrement hl the easy way - ld a,[hld] + dec [hl] push hl ld hl, failatstr call puts @@ -235,11 +304,37 @@ insntest: cpl cp $AA jr nz,.fail + + ; Test DI/EI delay + di + ld hl, .dinocausefail + ld c, $0F ; First, wait until an interrupt happens... +.wait: ld a, [c] + and $04 + cp 0 + jr z, .wait + ei ; Now make sure that an IRQ didn't happen on EI/DI + di + ld a, [c] + and $04 + cp 0 + jr z, .fail + ld hl, .dicausefail + ei ; Make sure that an IRQ does happen on EI/NOP/DI + nop + nop + di + ld a, [c] + and $04 + cp 0 + jr nz, .fail + ei ld hl, .ok call puts ret .fail: + ei call puts ld hl, .testfailed call puts @@ -262,6 +357,10 @@ insntest: db "CPL",0 .inc16fail: db "INC16",0 +.dinocausefail: + db "DI/EI does not cause interrupt",0 +.dicausefail: + db "DI/NOP/EI cause interrupt",0 .testfailed: db " test failed.",$0D,$0A,0 .ok: @@ -285,3 +384,4 @@ puts: ret z call putc jr puts +