X-Git-Url: http://git.joshuawise.com/fpgaboy.git/blobdiff_plain/f9000d73c8971e2e6323122efb06bcfd846b5d62..39a68cde9f2a76dabfcc9d7654f212ad1d7b356a:/diag.asm

diff --git a/diag.asm b/diag.asm
index 55127f8..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
 
@@ -34,28 +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 $9C
+	jp nz,.loop
+	ret
+
+vbl:
+	PUSH AF
+	PUSH BC
+	PUSH DE
+	PUSH HL
+	
+	xor a
+	ld [$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:
-	inc [hl]
-	ld a, [hl]
-	ld c, $51
-	ld [c], a
+	ld a, [$DF81]
+	inc a
+	ld [$DF81], a
+	ld [$FF51], a
 
 	POP HL
 	POP DE
@@ -68,7 +138,7 @@ memtest:
 	ld hl,memteststr
 	call puts
 	
-	ld hl, $C001		; Write loop
+	ld hl, $C000		; Write loop
 .wr:
 	ld a,h
 	xor l
@@ -80,7 +150,7 @@ memtest:
 	cp $80
 	jr nz, .wr
 
-	ld hl, $C001		; Read loop
+	ld hl, $C000		; Read loop
 .rd:
 	ld a,h
 	xor l
@@ -101,7 +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
@@ -237,20 +307,25 @@ insntest:
 
 	; Test DI/EI delay
 	di
-	ld hl, .difail
+	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
@@ -282,8 +357,10 @@ insntest:
 	db "CPL",0
 .inc16fail:
 	db "INC16",0
-.difail:
-	db "DI/EI delay",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:
@@ -307,3 +384,4 @@ puts:
 	ret z
 	call putc
 	jr puts
+