Readd .keep

[fpgaboy.git] / diag.asm

diff --git a/diag.asm b/diag.asm
index 786052e76801b8ef901312ad0c2c474d660331e0..8e09874baaf06cdb9b6472508f81a2cbff6a8dda 100644 (file)
--- 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
@@ -34,29 +48,63 @@ main:
 signon:
        db $0D,$0A,$1B,"[1mFPGABoy Diagnostic ROM",$1B,"[0m",$0D,$0A,0
 
-       section "fuq",HOME[$100]
-irqhand:
+vbl:
+       PUSH AF
+       PUSH BC
+       PUSH DE
+       PUSH HL
+       
+       xor a
+       ld [$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 c, $0F       ; ack the irq
+       ld [$FF0F], a
+       
+       ld c, $45       ; LYC
+       ld a, [c]
+       inc a
        ld [c], a
        
-       ld hl, $DF82
-       ld a, [hld]
+       ld a, [$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 +117,7 @@ memtest:
        ld hl,memteststr
        call puts
        
-       ld hl, $C001            ; Write loop
+       ld hl, $C000            ; Write loop
 .wr:
        ld a,h
        xor l
@@ -81,7 +129,7 @@ memtest:
        cp $80
        jr nz, .wr
 
-       ld hl, $C001            ; Read loop
+       ld hl, $C000            ; Read loop
 .rd:
        ld a,h
        xor l
@@ -102,7 +150,7 @@ 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 +283,37 @@ 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 +336,10 @@ 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 +363,4 @@ puts:
        ret z
        call putc
        jr puts
+