X-Git-Url: http://git.joshuawise.com/fpgaboy.git/blobdiff_plain/611e4a90d4f4c5b5e2cadde0da57639bfbaca6a8..5c33c5c001049403ac33d71bfbe0115c318c1b4c:/rom.asm

diff --git a/rom.asm b/rom.asm
index aa070ff..512cfce 100644
--- a/rom.asm
+++ b/rom.asm
@@ -4,20 +4,71 @@ main:
 	ld c, $51	; Note that we are alive.
 	ld a, $FF
 	ld [c],a
+	
+	ld sp, $DFF0
+	
+	ld hl, $DF81
+	ld a, $80
+	ld [hl], a
 
-	ld sp, $DFFF
+;	ld c, $07
+;	ld a, $04	;start timer, 4.096KHz
+;	ld [c], a
+diqs:;	ei
+	jr diqs
 
 	ld hl, signon
 	call puts
+
+	
+	ei
 	
 	call memtest
 
 	call insntest
 
 	call waitsw
+	di
 
 	jr main
 
+	section "fuq",HOME[$50]
+irqhand:
+	PUSH AF
+	PUSH BC
+	PUSH DE
+	PUSH HL
+	
+;	ld c, $51
+;	ld a, $F0
+;	ld [c], a
+	
+	xor a
+	ld c, $0F	; ack the irq
+	ld [c], a
+	
+	;ld a, $41	; print A
+	;call putc
+	
+	ld hl, $DF81
+	ld a, [hl]
+;	ld b, 1
+;	add b
+	ld c, $51
+;	ld [c], a
+;	ld [hl], a
+
+
+;	ld c, $51
+;	ld a, $0F
+;	ld [c], a
+	
+	POP HL
+	POP DE
+	POP BC
+	POP AF
+	RETI
+
 signon:
 	db $0D,$0A,$1B,"[1mFPGABoy Diagnostic ROM",$1B,"[0m",$0D,$0A,0
 
@@ -26,7 +77,7 @@ memtest:
 	ld hl,memteststr
 	call puts
 	
-	ld hl, $C000		; Write loop
+	ld hl, $C001		; Write loop
 .wr:
 	ld a,h
 	xor l
@@ -38,7 +89,7 @@ memtest:
 	cp l
 	jr nz, .wr
 
-	ld hl, $C000		; Read loop
+	ld hl, $C001		; Read loop
 .rd:
 	ld a,h
 	xor l
@@ -103,16 +154,16 @@ puthex:				; Put two hex nibbles to the serial console.
 waitsw:
 	ld hl,waitswstr
 	call puts
-	
+
 	ld c, $51
-	ld a, $00
+	xor a
 	ld [c],a
 	
-	ld c, $51
 	ld b, $0
 .loop1:
 	ld a,[c]
 	cp b
+	ei
 	jr z,.loop1
 .loop2:
 	ld a,[c]
@@ -121,7 +172,7 @@ waitsw:
 	ret
 
 waitswstr:
-	db "Diagnostic ROM complete; flip switches to nonzero and then to zero to reset.",$0D,$0A,0
+	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:
@@ -167,6 +218,18 @@ insntest:
 	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
@@ -211,16 +274,18 @@ insntest:
 	db "CP",0
 .cplfail:
 	db "CPL",0
+.inc16fail:
+	db "INC16",0
 .testfailed:
-	db "test failed.",$0D,$0A,0
+	db " test failed.",$0D,$0A,0
 .ok:
 	db "OK!",$0D,$0A,0
 
 ; Serial port manipulation functions.
 putc:
-	push af
 	ld b, 0
 	ld c, $50
+	push af
 .waitport:
 	ld a,[c]
 	cp b
@@ -233,9 +298,6 @@ puts:
 	ld a, [hli]
 	ld b, $00
 	cp b
-	jr z, .done
+	ret z
 	call putc
 	jr puts
-.done:
-	ret
-