From: Neal Andrew Crook <neal@pippaluk.org.uk>
Date: Sun, 7 Aug 2016 21:05:46 +0000 (+0100)
Subject: change register assignment so that checksum is calculated properly.
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=f7f1da052518b6d22659d066b3319c596e43f904;p=FUZIX.git

change register assignment so that checksum is calculated properly.
This bug caused more weird behaviour than I can currently account
for. With the fix, it seems rock-solid.
---

diff --git a/Kernel/platform-multicomp09/dwread.s b/Kernel/platform-multicomp09/dwread.s
index 457184e0..c138e08c 100644
--- a/Kernel/platform-multicomp09/dwread.s
+++ b/Kernel/platform-multicomp09/dwread.s
@@ -64,9 +64,9 @@ rxAvail	  lda	    UARTSTA2
 	  bra	    rxAvail		; test again..
 
 * yes. Get it and move on
-rxGet	  lda	    UARTDAT2
+rxGet	  ldb	    UARTDAT2
 	  abx				; accummulate checksum
-	  sta	    ,u+			; store byte
+	  stb	    ,u+			; store byte
 	  leay	    ,-y			; decrement count
 	  bne	    rxNext
 	  lda	    #4			; represents CC.Z=1