RE: [N8VEM-S100:565] S-100 68K CPU board status

["Andrew Lynch" <LYN...@YAHOO.COM>]

Hi John!  Thanks!  Here is the latest information on the ECB mini68K board

http://n8vem-sbc.pbworks.com/w/browse/#view=ViewFolder&param=ECB%20baby%2068
000

Thanks and have a nice day!

Andrew Lynch


-----Original Message-----
From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On
Behalf Of John Monahan
Sent: Friday, December 23, 2011 5:10 PM
To: n8vem...@googlegroups.com
Subject: RE: [N8VEM-S100:565] S-100 68K CPU board status

John could you direct me to the most relevant URL for the ECB baby M86K
Thanks John


John Monahan Ph.D
mon...@vitasoft.org

-----Original Message-----
From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On
Behalf Of John Coffman
Sent: Friday, December 23, 2011 12:04 PM
To: n8vem...@googlegroups.com
Subject: Re: [N8VEM-S100:564] S-100 68K CPU board status

John,

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,
1.44Mb).

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
FM mode.

--John



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
>
>
> John Monahan Ph.D
> mon...@vitasoft.org
>
>
> -----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
>
>
> [snip]
>
> 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
> http://8bit.zapto.org
>
>
>
>