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RE: [N8VEM-S100:564] S-100 68K CPU board status
John could you direct me to the most relevant URL for the ECB baby M86K
John Monahan Ph.D
From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On
Behalf Of John Coffman
Sent: Friday, December 23, 2011 12:04 PM
Subject: Re: [N8VEM-S100:564] S-100 68K CPU board status
The ECB baby M68k approach has been to write a BIOS that can load from CF
card. The next round of the BIOS will have Floppy support (1.2Mb, 720Kb,
I haven't tackled CP/M-68 yet; but I don't see it as very difficult to
support above the BIOS level.
Ultimately I'd like to see real CP/M diskettes supported: 128 bytes/sector
On 12/23/2011 09:38 AM, John Monahan wrote:
> Hi Guy's, While waiting for a few components to arrive for the S-100
> VGA prototype board (very slow here this time of the year, very
> frustrating), I have been browsing the web looking for the easiest way
> in software to get CPM68K running with our 68K board, ZFDC board etc.
> Has anybody done this in the classical way, i.e. write a BIOS is
> assembler link it in with DR's code, place it on a 8" disk and get
> going from there. Most of what I see is in C code and/or requires a
CPM68K OS already running to get going.
> John Monahan Ph.D
> -----Original Message-----
> From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com]
> On Behalf Of Andrew Lynch
> Sent: Friday, December 23, 2011 7:00 AM
> To: n8vem...@googlegroups.com
> Subject: [N8VEM-S100:562] S-100 68K CPU board status
> Hi Mike! We made some changes to the third prototype to add the TMI
> circuitry and remove some of the redundant debugging hardware. You'll
> notice the board is using the DIP-64 version of the CPU so it is back
> to closer to your MMU design.
> The PCB is taking forever to clean up the trace routing although
> recently it is showing signs of improvement. Slowly though...
> Please keep up with the MMU design because there is going to be an
> S-100 68K CPU board eventually!
> Thanks and have a nice day!
> Andrew Lynch
> PS. Sorry I've been slacking on the 68K work, guys, I've been just up
> to my neck, it's getting closer to the front burner however.
> Mike Sharkey