Framebuffer poking

[fpgaboy.git] / diag.asm

diff --git a/diag.asm b/diag.asm
index 004935ab0dc80372af5aed45621ee2fc2bc66304..80164004fea23ecde8dc9fcdd67c005c506978de 100644 (file)
--- a/diag.asm
+++ b/diag.asm
@@ -1,19 +1,34 @@
-       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:
 
 main:

-       ld c, $51       ; Note that we are alive.

        ld a, $FF
        ld a, $FF

-       ld [c],a
-       
+       ld c, $51
+       ld [c], a
+

        ld sp, $DFF0
        
        ld sp, $DFF0
        

-       ld c, $07

        ld a, $04       ;start timer, 4.096KHz
        ld a, $04       ;start timer, 4.096KHz

+       ld c, $07

        ld [c], a
        ld [c], a

-
+       

        ld hl, $DF81
        xor a
        ld hl, $DF81
        xor a

-       ld [hl], a
+       ld [hli], a
+       ld [hli], a

        
        ld hl, signon
        call puts
        
        ld hl, signon
        call puts


@@ -33,37 +48,73 @@ main:
 signon:
        db $0D,$0A,$1B,"[1mFPGABoy Diagnostic ROM",$1B,"[0m",$0D,$0A,0
 
 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 c, $0F
+       ld [c], 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 c, $0F
+       ld [c], a
+       
+       POP BC
+       POP AF
+       
+       reti
+       
+tmro:

        PUSH AF
        PUSH BC
        PUSH DE
        PUSH HL
        
        xor a
        PUSH AF
        PUSH BC
        PUSH DE
        PUSH HL
        
        xor a

-       ld c, $0F       ; ack the irq
+       ld c, $0F
+       ld [c], a
+       
+       ld c, $45       ; LYC
+       ld a, [c]
+       inc a

        ld [c], a
        
        ld [c], a
        

+       ld hl, $DF82
+       ld a, [hld]
+       cp 0
+       jr z, .noprint

        ld a, $41       ; print A
        call putc
        ld a, $41       ; print A
        call putc

-       
-       ld hl, $DF81
+.noprint:
+       inc [hl]

        ld a, [hl]
        ld a, [hl]

-       ld b, 1
-       add b

        ld c, $51
        ld [c], a
        ld c, $51
        ld [c], a

-       ld [hl], a
-

 
        POP HL
        POP DE
        POP BC
        POP AF
        RETI
 
        POP HL
        POP DE
        POP BC
        POP AF
        RETI

-       db $18,$FE,$18,$FE,$18,$FE,$18,$FE,$18,$FE,$18,$FE,$18,$FE,$18,$FE
-       db $18,$FE,$18,$FE,$18,$FE,$18,$FE,$18,$FE,$18,$FE,$18,$FE,$18,$FE
-       db $18,$FE,$18,$FE,$18,$FE,$18,$FE,$18,$FE,$18,$FE,$18,$FE,$18,$FE

 
 ; Memory tester: writes h ^ l to all addresses from C000 to DF80.
 memtest:
 
 ; Memory tester: writes h ^ l to all addresses from C000 to DF80.
 memtest:


@@ -75,11 +126,11 @@ memtest:
        ld a,h
        xor l
        ld [hli],a
        ld a,h
        xor l
        ld [hli],a

-       ld a, $DF
-       cp h
+       ld a, h
+       cp $DF

        jr nz, .wr
        jr nz, .wr

-       ld a, $80
-       cp l
+       ld a, l
+       cp $80

        jr nz, .wr
 
        ld hl, $C001            ; Read loop
        jr nz, .wr
 
        ld hl, $C001            ; Read loop


@@ -91,11 +142,11 @@ memtest:
        cp b
        jr nz, .memfail
        
        cp b
        jr nz, .memfail
        

-       ld a, $DF
-       cp h
+       ld a, h
+       cp $DF

        jr nz, .rd
        jr nz, .rd

-       ld a, $80
-       cp l
+       ld a, l
+       cp $80

        jr nz, .rd
        
        ld hl, testokstr        ; Say we're OK
        jr nz, .rd
        
        ld hl, testokstr        ; Say we're OK


@@ -130,16 +181,12 @@ puthex:                           ; Put two hex nibbles to the serial console.
        rra
        rra
        rra
        rra
        rra
        rra

-       ld b,$0F
-       and b
-       ld b,$30
-       add b
+       and $0F
+       add $30

        call putc
        pop af
        call putc
        pop af

-       ld b,$0F
-       and b
-       ld b,$30
-       add b
+       and $0F
+       add $30

        call putc
        ret
 
        call putc
        ret
 


@@ -147,19 +194,22 @@ puthex:                           ; Put two hex nibbles to the serial console.
 waitsw:
        ld hl,waitswstr
        call puts
 waitsw:
        ld hl,waitswstr
        call puts

+       
+       ld hl,$DF82
+       ld a, 1
+       ld [hl], a

 
        ld c, $51
        xor a
        ld [c],a
        
 
        ld c, $51
        xor a
        ld [c],a
        

-       ld b, $0

 .loop1:
        ld a,[c]
 .loop1:
        ld a,[c]

-       cp b
+       cp $0

        jr z,.loop1
 .loop2:
        ld a,[c]
        jr z,.loop1
 .loop2:
        ld a,[c]

-       cp b
+       cp $0

        jr nz,.loop2
        ret
 
        jr nz,.loop2
        ret
 


@@ -203,8 +253,7 @@ insntest:
 
        ; Test JR
        ld a, $FF
 
        ; Test JR
        ld a, $FF

-       ld b, $00
-       cp b
+       cp $0

        jr nz,.jr
        ld hl, .jrfail
        jr .fail
        jr nz,.jr
        ld hl, .jrfail
        jr .fail


@@ -226,26 +275,49 @@ insntest:
        ; Test CP.
        ld hl, .cpfail
        ld a, $10
        ; Test CP.
        ld hl, .cpfail
        ld a, $10

-       ld b, $20
-       cp b
+       cp $20

        jr nc,.fail
        ld a, $20
        jr nc,.fail
        ld a, $20

-       ld b, $10
-       cp b
+       cp $10

        jr c,.fail
        
        ; Test CPL
        ld hl, .cplfail
        ld a, $55
        jr c,.fail
        
        ; Test CPL
        ld hl, .cplfail
        ld a, $55

-       ld b, $AA

        cpl
        cpl

-       cp b
+       cp $AA

        jr nz,.fail
        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:
        
        ld hl, .ok
        call puts
        ret
 .fail:

+       ei

        call puts
        ld hl, .testfailed
        call puts
        call puts
        ld hl, .testfailed
        call puts


@@ -268,6 +340,10 @@ insntest:
        db "CPL",0
 .inc16fail:
        db "INC16",0
        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:
 .testfailed:
        db " test failed.",$0D,$0A,0
 .ok:


@@ -275,12 +351,11 @@ insntest:
 
 ; Serial port manipulation functions.
 putc:
 
 ; Serial port manipulation functions.
 putc:

-       ld b, 0

        ld c, $50
        push af
 .waitport:
        ld a,[c]
        ld c, $50
        push af
 .waitport:
        ld a,[c]

-       cp b
+       cp $00

        jr nz,.waitport
        pop af
        ld [c],a
        jr nz,.waitport
        pop af
        ld [c],a


@@ -288,8 +363,8 @@ putc:
 
 puts:
        ld a, [hli]
 
 puts:
        ld a, [hli]

-       ld b, $00
-       cp b
+       cp $00

        ret z
        call putc
        jr puts
        ret z
        call putc
        jr puts

+