X-Git-Url: http://git.joshuawise.com/fpgaboy.git/blobdiff_plain/2bcaaabf0bbbb0232fe8ffe0a8943a14159852ab..65d3506eebbdc5ae3e52c112b0ef74e447553586:/xm.asm

diff --git a/xm.asm b/xm.asm
index d4b5374..3a4b25e 100644
--- a/xm.asm
+++ b/xm.asm
@@ -1,24 +1,23 @@
 	SECTION "wee",HOME[$0]
 	; this all needs to be PIC!
-st:
-	ld sp, $CFFF
-	xor a
-	ld hl, $FF60
-	ld [hli], a
-	ld [hli], a
-	ld [hli], a
+;	xor a
+;	ld hl, $FF60
+;	ld [hli], a
+;	ld [hli], a
+;	ld [hli], a
+st:	ld sp, $CFFF
 nak:
 	ld a, $15	; NAK
 	call putc+$FF80
 	
 .ack:	call getc+$FF80
-	cp $01	;SOH
-	jr z,.soh
+;	cp $01	;SOH
+;	jr z,.soh
 	cp $04	;EOT
 	jr z, .eot
 	cp $18	;CAN
 	jr z, .rst
-	jr .donak
+	jr nak
 
 .eot:
 	ld A, $06	; Ack the EOT
@@ -27,26 +26,24 @@ nak:
 
 .soh:	call getc+$FF80	; blk
 	call getc+$FF80	; iblk
-	xor a
-	ld b, a
-	ld l, a
-	ld h, $C0
-.lp:	call getc+$FF80
+	ld b, $00
+	ld hl, $C000
+.lp:	bit 7, l
+	jr nz, .cksm
+	call getc+$FF80
 	ld [hli], a
 	add b
 	ld b, a
-	bit 7, l
-	jr z, .lp
+	jr .lp
 .cksm:	call getc+$FF80
 	cp b
 	jr nz, .donak
 	ld hl, $C000
-.lp2:	jr z, .doack
-	ld a, [hli]
+.lp2:	ld a, [hli]
 	ld [$FF63], A
 	bit 7, l
 	jr z,.lp2
-.doack:	ld A, $06
+.doack:	ld A, $06	; 06
 	call putc+$FF80
 	jr .ack
 .donak:	call getc+$FF80		; Wait until the line clears, and then once
@@ -54,7 +51,7 @@ nak:
 
 getc:
 	xor d
-	xor e
+	;xor e	; Possibly not needed?
 .dgetc:
 	dec de
 	xor a
@@ -66,11 +63,12 @@ getc:
 	ld a, [$FF52]
 	ret
 .timeout:
-	ld hl, $D000
+	ld hl, $D010
 	ld a, [hl]
 	inc a
 	ld [hl], a
 	ld [$FF51], a
+	pop hl
 	jr nak
 
 putc:
@@ -84,5 +82,5 @@ putc:
 	ld [$FF52],a
 	ret
 
-	section "a", HOME[$7F]
-	nop
\ No newline at end of file
+	section "a", HOME[$7E]
+	nop