X-Git-Url: http://git.joshuawise.com/fpgaboy.git/blobdiff_plain/80ecd2fe23cfab4f410f8f760dea4b44d72a82c9..bf3f2c5f96cdfc7629e93d810f42550349388122:/diag.asm?ds=inline

diff --git a/diag.asm b/diag.asm
index 50cefe7..780f5c2 100644
--- a/diag.asm
+++ b/diag.asm
@@ -1,6 +1,3 @@
-	section "end",HOME[1024]
-	nop
-
 	SECTION "a",HOME[$00]
 
 start: jp main
@@ -14,6 +11,19 @@ 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 +43,9 @@ main:
 	ld hl, signon
 	call puts
 
+	ld a, $91
+	ld [$FF40], a
+
 	call putscreen
 	
 	ei
@@ -50,59 +63,69 @@ main:
 signon:
 	db $0D,$0A,$1B,"[1mFPGABoy Diagnostic ROM",$1B,"[0m",$0D,$0A,0
 
+tiles:
+	db %01111100
+	db %11000110
+	db %11000110
+	db %11111110
+	db %11000110
+	db %11000110
+	db %11000110
+	db %00000000
+	
+	db %11111100
+	db %11000110
+	db %11000110
+	db %11111100
+	db %11000110
+	db %11000110
+	db %11111100
+	db %00000000
+
+	db %01111100
+	db %11000110
+	db %11000010
+	db %11000000
+	db %11000010
+	db %11000110
+	db %01111100
+	db %00000000
+
+	db %11111100
+	db %11000110
+	db %11000110
+	db %11000110
+	db %11000110
+	db %11000110
+	db %11111100
+	db %00000000
+
 putscreen:
+	LD A,$fc		; $001d  Setup BG palette
+	LD [$FF47],A	; $001f
+
 	; Wait for vblank
 	call .vblwait
 
 	ld hl, $8000	; Copy two tiles.
-	ld a, $AA
-	ld [hli], a
-	ld [hli], a
-	ld a, $55
-	ld [hli], a
-	ld [hli], a
-	ld a, $AA
-	ld [hli], a
-	ld [hli], a
-	ld a, $55
-	ld [hli], a
-	ld [hli], a
-	ld a, $AA
-	ld [hli], a
-	ld [hli], a
-	ld a, $55
-	ld [hli], a
-	ld [hli], a
-	ld a, $AA
-	ld [hli], a
-	ld [hli], a
-	ld a, $55
+	ld de, tiles
+	ld c, $20
+.cloop:	ld a, [de]
+	inc de
 	ld [hli], a
 	ld [hli], a
+	dec c
 	xor a
-	ld [hli], a
-	ld [hli], a
-	ld [hli], a
-	ld [hli], a
-	ld [hli], a
-	ld [hli], a
-	ld [hli], a
-	ld [hli], a
-	ld [hli], a
-	ld [hli], a
-	ld [hli], a
-	ld [hli], a
-	ld [hli], a
-	ld [hli], a
-	ld [hli], a
-	ld [hli], a
+	cp c
+	jr nz, .cloop
 	
 	ld hl, $9800
 .vloop:	call .vblwait
 	ld c, $40
-.loop:	ld a, $01
-	ld [hli], a
-	xor a
+	ld b, 0
+.loop:	ld a, b
+	inc b
+	and $03
 	ld [hli], a
 	ld a, h
 	cp $9C
@@ -134,30 +157,19 @@ vbl:
 	ld [$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:
@@ -319,8 +331,8 @@ waitsw:
 	ld a,[c]
 	cp $0
 	jr z,.loop1
-.loop2:
-	ld a,[c]
+
+.loop2:	ld a,[c]
 	cp $0
 	jr nz,.loop2
 	ret