Motorola 6800 cross-assembler

Comment   Posted by: Romanoni Giancarlo on Thursday, March 15, 2007

Dear Sir

I'm using the A68 cross assembler V1.2.02 FOR A 6800 PROJECT BUT we found that the mnemonics JSR instead to translate in machine code BD is translated in CD .

Can you help me to overcome this problem ?

Many thanks for an your help
Best Regards

Giancarlo

A68 cross assembler   Posted by: Joseph Cseh on Monday, July 14, 2008

Dear Sir,
I have been using the A68 cross assembler V1.2.02 for some time to build a 6800 based project. I found that it translates the instruction JSR in machine CD instead of BD. Any help would be appreciated.
Best Reegard
J. Cseh

A68 cross assembler   Posted by: bibi on Monday, September 29, 2008

look your cross assembler A68 code across PC TOOLS. Change in the table CD by BD and save the new A68.exe
french bibi

A68 direct addressing   Posted by: Johan on Wednesday, August 19, 2009

I'm experiencing the same issue already addressed on this page with the JSR instruction. I understand there is a fix available, but don’t quite understand how the solution by French Bibi works. Did anyone get this to work?

I’m also struggling with direct addressing. It should be possible to use e.g. "ldaa h’7B,d", yielding the instruction "967B". The ",d" syntax is however not covered in the documentation. Is there another way to tell PseudoSam to use this instruction instead of the extended variant ("B6007B"?

A68.COM jsr patch   Posted by: Martin Eberhard on Monday, October 24, 2011

Use a hex editor (such as XVI32.EXE) to change location 0xAFAB from 0x9D to 0x8D. This fixes 'jsr' so that it produces the correct 0xBD instead of the incorrect 0xCD. (Am I the last person using this processor?)