Wire switches back up and remove cclk.

[fpgaboy.git] / rom.asm

diff --git a/rom.asm b/rom.asm
index 437f01e5c5e036687992cf8a7ea646588eb7695d..0c25faba8bed2c5e703cf912f20a5781e64c65fd 100644 (file)
--- a/rom.asm
+++ b/rom.asm
@@ -5,24 +5,28 @@ main:
        ld a, $FF
        ld [c],a
        
        ld a, $FF
        ld [c],a
        

-       ld sp, $DFFF
-
-       ld hl, signon
-       call puts
+       ld sp, $DFF0
+       
+       ld hl, $DF81
+       ld a, $80
+       ld [hl], a

 
        ld c, $07
        ld a, $04       ;start timer, 4.096KHz
        ld [c], a
 
        ld c, $07
        ld a, $04       ;start timer, 4.096KHz
        ld [c], a

+;diqs: ei
+;      ld a, $80
+;      ld c, $51
+;      ld [c], a
+;      jr diqs
+       call irqhand

        ei
        ei

-       
-       call memtest
-
-       call insntest
+coqs: jr coqs

 
 

-       call waitsw
+       section "Diq", HOME[$38]
+fuqed:

        di
        di

-
-       jr main
+       jr fuqed

 
        section "fuq",HOME[$100]
 irqhand:
 
        section "fuq",HOME[$100]
 irqhand:


@@ -30,229 +34,32 @@ irqhand:
        PUSH BC
        PUSH DE
        PUSH HL
        PUSH BC
        PUSH DE
        PUSH HL

+       

        xor a
        ld c, $0F       ; ack the irq
        ld [c], a
        xor a
        ld c, $0F       ; ack the irq
        ld [c], a

+       

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

-       POP HL
-       POP DE
-       POP BC
-       POP AF
-       RETI
-
-signon:
-       db $0D,$0A,$1B,"[1mFPGABoy Diagnostic ROM",$1B,"[0m",$0D,$0A,0
-
-; Memory tester: writes h ^ l to all addresses from C000 to DF80.
-memtest:
-       ld hl,memteststr
-       call puts

        
        

-       ld hl, $C000            ; Write loop
-.wr:
-       ld a,h
-       xor l
-       ld [hli],a
-       ld a, $DF
-       cp h
-       jr nz, .wr
-       ld a, $80
-       cp l
-       jr nz, .wr
-
-       ld hl, $C000            ; Read loop
-.rd:
-       ld a,h
-       xor l
-       ld b,a
-       ld a, [hli]
-       cp b
-       jr nz, .memfail
-       
-       ld a, $DF
-       cp h
-       jr nz, .rd
-       ld a, $80
-       cp l
-       jr nz, .rd
-       
-       ld hl, testokstr        ; Say we're OK
-       call puts
-       ret
-.memfail:                      ; Say we failed (sadface)
-       ; decrement hl the easy way
-       ld a,[hld]
-       push hl
-       ld hl, failatstr
-       call puts
-       pop hl
-       ld a, h
-       call puthex
-       ld a, l
-       call puthex
-       ld a, $0A
-       call putc
-       ld a, $0D
-       call putc
-       ret
-memteststr:
-       db "Testing memory from $C000 to $DF80...",0
-testokstr:
-       db " OK!",$0D,$0A,0
-failatstr:
-       db " Test failed at $",0
-
-puthex:                                ; Put two hex nibbles to the serial console.
-       push af
-       rra
-       rra
-       rra
-       rra
-       ld b,$0F
-       and b
-       ld b,$30
+       ld hl, $DF81
+       ld a, [hl]
+       ld b, 1

        add b
        add b

-       call putc
-       pop af
-       ld b,$0F
-       and b
-       ld b,$30
-       add b
-       call putc
-       ret
-
-; Wait for switches to be flipped on and off again.
-waitsw:
-       ld hl,waitswstr
-       call puts
-

        ld c, $51
        ld c, $51

-       xor a
-       ld [c],a
-       
-       ld b, $0
-.loop1:
-       ld a,[c]
-       cp b
-       jr z,.loop1
-.loop2:
-       ld a,[c]
-       cp b
-       jr nz,.loop2
-       ret
-
-waitswstr:
-       db "Diagnostic ROM complete; flip switches to nonzero and then to zero to reset. Expect A.",$0D,$0A,0
-
-; Core instruction basic acceptance tests.
-insntest:
-       ld hl, .insnteststr
-       call puts
-       
-       ; Test PUSH and POP.
-       ld b, $12
-       ld c, $34
-       ld d, $56
-       ld e, $78
-       push bc
-       pop de
-       ld hl, .pushpopfail
-       ld a, d
-       cp b
-       jr nz,.fail
-       ld a, e
-       cp c
-       jr nz,.fail
-       
-       ; Test ALU (HL).
-       ld hl, .ff
-       ld a, $FF
-       xor [hl]
-       ld hl, .xorhlfail
-       jr nz, .fail
-       
-       ; Test JP (HL)
-       ld hl, .jphl
-       jp [hl]
-       ld hl, .jphlfail
-       jr .fail
-       rst $00
-.jphl:
+       ld [c], a
+       ld [hl], a

 
 

-       ; Test JR
-       ld a, $FF
-       ld b, $00
-       cp b
-       jr nz,.jr
-       ld hl, .jrfail
-       jr .fail
-       rst $00
-.jr:

 
 

-       ; Test inc16
-       ld d, $12
-       ld e, $FF
-       ld hl, .inc16fail
-       inc de
-       ld a, $13
-       cp d
-       jr nz, .fail
-       ld a, $00
-       cp e
-       jr nz, .fail
-       
-       ; Test CP.
-       ld hl, .cpfail
-       ld a, $10
-       ld b, $20
-       cp b
-       jr nc,.fail
-       ld a, $20
-       ld b, $10
-       cp b
-       jr c,.fail
-       
-       ; Test CPL
-       ld hl, .cplfail
-       ld a, $55
-       ld b, $AA
-       cpl
-       cp b
-       jr nz,.fail
-       
-       ld hl, .ok
-       call puts
-       ret
-.fail:
-       call puts
-       ld hl, .testfailed
-       call puts
-       ret
-.insnteststr:
-       db "Testing instructions... ",0
-.pushpopfail:
-       db "PUSH/POP",0
-.ff:
-       db $FF
-.xorhlfail:
-       db "XOR [HL]",0
-.jphlfail:
-       db "JP [HL]",0
-.jrfail:
-       db "JR",0
-.cpfail:
-       db "CP",0
-.cplfail:
-       db "CPL",0
-.inc16fail:
-       db "INC16",0
-.testfailed:
-       db " test failed.",$0D,$0A,0
-.ok:
-       db "OK!",$0D,$0A,0
+       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

 
 

-; Serial port manipulation functions.

 putc:
        ld b, 0
        ld c, $50
 putc:
        ld b, 0
        ld c, $50


@@ -264,13 +71,3 @@ putc:
        pop af
        ld [c],a
        ret
        pop af
        ld [c],a
        ret

-
-puts:
-       ld a, [hli]
-       ld b, $00
-       cp b
-       jr z, .done
-       call putc
-       jr puts
-.done:
-       ret