Hi John, Sounds good to me. As I see it, the Phantom line is going to "over ride" the board's memory select, thus forcing the board to read/write the intended memory from the BUS. I am guessing this board's bus master/slave is done through the three disable bus lines? (data, address, control). I'm still being a little slow on this project at the moment, just scribbling some thoughts/notes. I'm maximizing my time with the kids because summer is running out fast. When I build a prototype that works, I can present it to the group and then work in the suggested mod's and test them before Andrew spends his time laying out a board. Regards, Josh
From: mon...@vitasoft.org To: n8vem...@googlegroups.com Subject: RE: [N8VEM-S100:1846] IMSAI 8080 CPU card replacement Date: Sat, 24 Aug 2013 12:16:46 -0700 Josh, when you get done let me know if you would like to add the capability of running the board as a bus master/slave. Should not be too hard, have done it for 8088,8086, 80286,80386 and 6502. Makes it nice to have it just sit there if/until needed. John From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf Of Crusty OMO
Sent: Tuesday, August 20, 2013 8:11 PM
To: n8vem...@googlegroups.com
Subject: RE: [N8VEM-S100:1835] IMSAI 8080 CPU card replacement Hi Andrew,
I intend to redo this board to add all the features the group has been discussing.
I have some scribbles for the new design but I want to test them out on a prototype board first.
There just hasn't been any time for me to build yet... the hot weather has me at the beach with the kids most days and is leaving me beat by the evening time. I am guessing to be more productive in September when school starts.
What program are you using to create the schematics? Can I run the same and save you the time of re-entering it?
Regards,
Josh.
> From: LYN...@YAHOO.COM
> To: n8vem...@googlegroups.com
> Subject: RE: [N8VEM-S100:1832] IMSAI 8080 CPU card replacement
> Date: Mon, 19 Aug 2013 16:36:56 -0400
>
> Hi
> The S-100 8080 CPU/FP interface board is still alive and well. John has the
> schematic and is going to make updates as soon as he is available. He is
> working on the S-100 to ISA converter board at the moment in hot pursuit of
> the long elusive S-100 VGA board design.
>
> If anyone else has modifications I can add now please let me know. Thanks
> and have a nice day!
>
> Andrew Lynch
>
>
> > -----Original Message-----
> > From: n8vem...@googlegroups.com [mailto:n8vem-
> > s1...@googlegroups.com] On Behalf Of Rob Doyle
> > Sent: Saturday, August 10, 2013 12:17 AM
> > To: n8vem...@googlegroups.com
> > Subject: Re: [N8VEM-S100:1791] IMSAI 8080 CPU card replacement
> >
> > I'm interested in one.
> > Rob.
> >
>
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