Crasm

Tracker: Bugs

5 6502 CPX and CPY opcodes are mixed up - ID: 1834185

Last Update: Comment added ( leonb )

Details:

A 6502 CPX immediate instruction is 0xE0 and CPY immediate is 0xC0. crasm
reverses these.

Submitted:

Thomas Skibo ( skibo ) - 2007-11-18 19:47

Priority:

Status:

Closed

Resolution:

Fixed

Assigned:

Nobody/Anonymous

Category:

None

Group:

None

Visibility:

Public

Comments ( 2 )

Date: 2008-11-06 17:31 Sender: leonb Ooops. Fixed in crasm-1.5.
Date: 2008-01-30 17:22 Sender: jorikb I ran into this bug as well, here is a patch: +++ crasm-1.4/src/cpu6502.c 2008-01-30 18:17:26.000000000 +0100 @@ -274,8 +274,8 @@ mnemo2 ("ldx", 1,0xa0 ,F_noacc\|F_noindx ) mnemo2 ("ldy", 1,0x9e ,F_noacc\|F_noindy ) -mnemo2 ("cpx", 1,0xbe ,F_noindy\|F_noindx\|F_noacc ) -mnemo2 ("cpy", 1,0xde ,F_noindy\|F_noindx\|F_noacc ) +mnemo2 ("cpx", 1,0xde ,F_noindy\|F_noindx\|F_noacc ) +mnemo2 ("cpy", 1,0xbe ,F_noindy\|F_noindx\|F_noacc ) mnemo2 ("stx", 2,0x80 ,F_noindx ) mnemo2 ("sty", 2,0x7e ,F_noindy ) basically you only need to swap these two entries and rebuild the assembler

Date: 2008-11-06 17:31
Sender: leonb

Ooops. Fixed in crasm-1.5.

Date: 2008-01-30 17:22
Sender: jorikb

I ran into this bug as well, here is a patch:

+++ crasm-1.4/src/cpu6502.c 2008-01-30 18:17:26.000000000 +0100
@@ -274,8 +274,8 @@

mnemo2 ("ldx", 1,0xa0 ,F_noacc|F_noindx )
mnemo2 ("ldy", 1,0x9e ,F_noacc|F_noindy )
-mnemo2 ("cpx", 1,0xbe ,F_noindy|F_noindx|F_noacc )
-mnemo2 ("cpy", 1,0xde ,F_noindy|F_noindx|F_noacc )
+mnemo2 ("cpx", 1,0xde ,F_noindy|F_noindx|F_noacc )
+mnemo2 ("cpy", 1,0xbe ,F_noindy|F_noindx|F_noacc )

mnemo2 ("stx", 2,0x80 ,F_noindx )
mnemo2 ("sty", 2,0x7e ,F_noindy )

basically you only need to swap these two entries and rebuild the
assembler

Attached File

Changes ( 3 )

Field	Old Value	Date	By
status_id	Open	2008-11-06 17:31	leonb
resolution_id	None	2008-11-06 17:31	leonb
close_date	-	2008-11-06 17:31	leonb

Crasm

Tracker: Bugs

Comments ( 2 )

Attached File

No Files Currently Attached

Changes ( 3 )

About SourceForge

Find Software

Develop Software

Community

Help