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Minor optimization.

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This commit is contained in:
oliverschmidt 2007-11-29 21:56:55 +00:00
parent a8313c3b39
commit b51a680a02
1 changed files with 5 additions and 3 deletions
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8
cpu/6502/net/cs8900a.S
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@ -30,7 +30,7 @@
; ;
; Author: Adam Dunkels <adam@sics.se>, Oliver Schmidt <ol.sc@web.de> ; Author: Adam Dunkels <adam@sics.se>, Oliver Schmidt <ol.sc@web.de>
; ;
; $Id: cs8900a.S,v 1.2 2007/11/24 12:57:09 oliverschmidt Exp $ ; $Id: cs8900a.S,v 1.3 2007/11/29 21:56:55 oliverschmidt Exp $
; ;
;--------------------------------------------------------------------- ;---------------------------------------------------------------------
@ -261,6 +261,7 @@ fixup31:sta ppdata
ldx bufaddr+1 ldx bufaddr+1
sta ptr sta ptr
stx ptr+1 stx ptr+1
ldx cnt+1
ldy #$00 ldy #$00
read: read:
fixup32:lda rxtxreg fixup32:lda rxtxreg
@ -273,7 +274,7 @@ fixup33:lda rxtxreg+1
inc ptr+1 inc ptr+1
: cpy cnt : cpy cnt
bne read bne read
dec cnt+1 dex
bpl read bpl read
; Return frame length ; Return frame length
@ -341,6 +342,7 @@ fixup44:sta ppdata
ldx bufaddr+1 ldx bufaddr+1
sta ptr sta ptr
stx ptr+1 stx ptr+1
ldx cnt+1
ldy #$00 ldy #$00
write: lda (ptr),y write: lda (ptr),y
fixup45:sta rxtxreg fixup45:sta rxtxreg
@ -352,7 +354,7 @@ fixup46:sta rxtxreg+1
inc ptr+1 inc ptr+1
: cpy cnt : cpy cnt
bne write bne write
dec cnt+1 dex
bpl write bpl write
rts rts