xba sets z based on the (new) low 8-bits

2021-07-17 21:24:28 -04:00 · 2021-07-17 21:24:28 -04:00 · 8a9c0d55c2
parent 6baf9b600f
commit 8a9c0d55c2
1 changed files with 3 additions and 9 deletions
--- a/bootblock.aii
+++ b/bootblock.aii
@ -194,17 +194,11 @@ ok
 	jsr read_extent_block

 	lda data+BTNodeDescriptor.numRecords ; # of records
-	xba
-;	asl a ; x 2
-;	sec
-;	sbc #512
-;	eor #-1
-;	inc a
-;	adc #-513 ; carry will be clear. +1 to avoid inc
-;	eor #-1
-	sta count
 	beq advance

+	xba
+	sta count
+
 again
 	ldx #512-2 ; last entry 
@loop