X-Git-Url: http://git.joshuawise.com/fpgaboy.git/blobdiff_plain/7e4f4505e544aaefc0fb3f6d9cd50fcdffc6f677..00573fd53c3dc0b2aca146f085d30801a3aed576:/diag.asm

diff --git a/diag.asm b/diag.asm
index 786052e..8d6aec8 100644
--- a/diag.asm
+++ b/diag.asm
@@ -1,14 +1,27 @@
-	SECTION "a",HOME
+	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, $FF
-	ld [c],a
+	ld [$FF51],a
+
+;	ld a, $04
+;	ld [$FFFF], a
 	
 	ld sp, $DFF0
 	
-	ld c, $07
 	ld a, $04	;start timer, 4.096KHz
+	ld c, $07
 	ld [c], a
 
 	ld hl, $DF81
@@ -34,15 +47,26 @@ main:
 signon:
 	db $0D,$0A,$1B,"[1mFPGABoy Diagnostic ROM",$1B,"[0m",$0D,$0A,0
 
-	section "fuq",HOME[$100]
-irqhand:
+vbl:
+lcdc:
+	PUSH AF
+	
+	xor a
+	ld c, $0F
+	ld [c], a
+	
+	POP AF
+	
+	reti
+	
+tmro:
 	PUSH AF
 	PUSH BC
 	PUSH DE
 	PUSH HL
 	
 	xor a
-	ld c, $0F	; ack the irq
+	ld c, $0F
 	ld [c], a
 	
 	ld hl, $DF82
@@ -52,11 +76,12 @@ irqhand:
 	ld a, $41	; print A
 	call putc
 .noprint:
+	ld hl, $DF81
 	ld a, [hl]
 	add 1
+	ld [hl], a
 	ld c, $51
 	ld [c], a
-	ld [hl], a
 
 	POP HL
 	POP DE
@@ -235,11 +260,37 @@ insntest:
 	cpl
 	cp $AA
 	jr nz,.fail
+
+	; Test DI/EI delay
+	di
+	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
 	
 	ld hl, .ok
 	call puts
 	ret
 .fail:
+	ei
 	call puts
 	ld hl, .testfailed
 	call puts
@@ -262,6 +313,10 @@ insntest:
 	db "CPL",0
 .inc16fail:
 	db "INC16",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: