Looking for 6800 binary compatible CPU

If you can't find such a beast, there is a 6800 core at

Andrew

I doubt it but there are 2 product lines that are very close. Specifically the 6805/68908 and 68111/6812 lines from Motorola.

regards Andrew

All the Motorola 68HC11 variations are upward compatible with the

Not the 68HC05- they left out a lot of stuff that was in the 6800.

Best regards, Spehro Pefhany

Cost. 6800s Cost us something like $1.15. We also have to maintain timing accuracy on a few operations (sub 100 microsecond pulses). I considered doing emulation (I've got plenty of experience there), but the closer I can get to the original chip the better.

-->Neil

Have you looked into the Freescale Coldfire line ?

I just picked up my old and trusty M68HC11 Reference Manual:

"1.2 PROGRAMMERS MODEL

In addition to executing all M6800 and M6801 instructions, the M68HC11 instruction set includes 91 new opcodes."

Roberto Waltman wrote:

Roberto Waltman.

I've got a lot of information on M68HCxxx line of Microcontrollers. Also have single board computers, vendors, tutorials, and all in my Links and Photos section in my group on Yahoo:

Also my site compares different microcontrollers and list information for other flavors as well. Anyway if you don't go there I'll help you any way I can.

Michael

Roberto Waltman wrote:

Are they *BINARY* compatible? I didn't think the 6800 and 68HC11 shared the same binary compatability (same nemonics, though).

-->Neil

Didnt Hitachi make a 6301 that was like the Moto 6800 ??

carsten

Carsten wrote in news: snipped-for-privacy@4ax.com:

I think the 6303 was, but had extra stuff. I may be mistaken on that, as my use of the 6303 used all it had to offer. My last 6800 machine was a Gimix system running Flex/OS (still have it, but the memory boards are all dead).

Jeff.

the

Indeed I have a foggy recollection from some years back that while they are assembly code machine mnemonic compatible, a few of the opcodes generated are different. I believe this applies to not more than about 4 instructions. I am sorry I can not remember what they were.

Dave Bardon, Avocet

I suspect you may be thinking of the 6809 processor. The '09 was indeed compatible at the mnemonics/assembly level only. The 68HC11 added some features from the 6809 architecture (a second index register, a 16 bit 'D' accumulator made from the concatenation of A&B, etc.) but this was done using unused entries in the 6800 opcode map.

All the manuals are available for download from Motorola. You have more than enough information to get a definitive answer by yourself...

One last thing: I know the 6800 opcodes are compatible with the

Roberto Waltman.