X-Git-Url: http://git.joshuawise.com/fpgaboy.git/blobdiff_plain/4fd47c85d2419ac8fa788696f7fda03cf3ce8124..41341eb3bab6479dc763afbe90c7c31a01d6b60f:/diag.asm

diff --git a/diag.asm b/diag.asm
index e9a9f19..3a3d665 100644
--- a/diag.asm
+++ b/diag.asm
@@ -1,9 +1,8 @@
-	section "end",HOME[1024]
-	nop
-
 	SECTION "a",HOME[$00]
 
-start: jp main
+start:	ld a, $AA
+	ld [$FF51], a
+	jr start
 	
 	section "vbl",HOME[$40]
 	jp vbl
@@ -14,6 +13,19 @@ start: jp main
 	section "tmro",HOME[$50]
 	jp tmro
 
+	SECTION "b",HOME[$100]
+boot:	jr main		; $0100
+	nop		; $0102
+	nop		; $0103
+	;Nintendo Logo	; $0104
+	DB $CE,$ED,$66,$66,$CC,$0D,$00,$0B,$03,$73,$00,$83,$00,$0C,$00,$0D 
+	DB $00,$08,$11,$1F,$88,$89,$00,$0E,$DC,$CC,$6E,$E6,$DD,$DD,$D9,$99 
+	DB $BB,$BB,$67,$63,$6E,$0E,$EC,$CC,$DD,$DC,$99,$9F,$BB,$B9,$33,$3E
+	;$0134 
+	DB $00,$E7,$00,$00,$00,$00,$00,$00, $00,$00,$00,$00,$00,$00,$00,$00
+	;$0144
+	DB $00,$00,$00,$00,$00,$00,$00,$00, $00,$00,$00,$00,$00,$00,$00,$00
+
 main:
 	ld a, $FF
 	ld c, $51
@@ -33,6 +45,9 @@ main:
 	ld hl, signon
 	call puts
 
+	ld a, $91
+	ld [$FF40], a
+
 	call putscreen
 	
 	ei
@@ -88,6 +103,9 @@ tiles:
 	db %00000000
 
 putscreen:
+	LD A,$fc		; $001d  Setup BG palette
+	LD [$FF47],A	; $001f
+
 	; Wait for vblank
 	call .vblwait
 
@@ -141,30 +159,19 @@ vbl:
 	ld [$FF0F], a
 
 	ld a, [$FF51]
-	ld b, a
-	and $80
-	cp $80
-	jr nz, .nothing
-	ld c, $0
+	bit 7, a
+	jr z, .nothing
 
-	ld a, b
-	and $1
-	cp c
+	bit 0, a
 	call nz, .scyup
 	
-	ld a, b
-	and $2
-	cp c
+	bit 1, a
 	call nz, .scydown
 	
-	ld a, b
-	and $4
-	cp c
+	bit 2, a
 	call nz, .scxup
 	
-	ld a, b
-	and $8
-	cp c
+	bit 3, a
 	call nz, .scxdown
 
 .nothing:
@@ -326,8 +333,8 @@ waitsw:
 	ld a,[c]
 	cp $0
 	jr z,.loop1
-.loop2:
-	ld a,[c]
+
+.loop2:	ld a,[c]
 	cp $0
 	jr nz,.loop2
 	ret
@@ -470,14 +477,14 @@ insntest:
 
 ; Serial port manipulation functions.
 putc:
-	ld c, $50
+	ld c, $53
 	push af
 .waitport:
 	ld a,[c]
-	cp $00
+	and $01
 	jr nz,.waitport
 	pop af
-	ld [c],a
+	ld [$FF52],a
 	ret
 
 puts: