RE: [N8VEM-S100:476] S-100 8086 CPU board ordered (finally!)

["John Monahan" <mon...@vitasoft.org>]

Oops! yes you are right Kipp.
Thanks John


John Monahan Ph.D
510-502-5890
mon...@vitasoft.org


-----Original Message-----
From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On
Behalf Of Kipp Yeakel
Sent: Saturday, November 12, 2011 8:54 PM
To: n8vem...@googlegroups.com
Cc: <n8vem...@googlegroups.com>
Subject: Re: [N8VEM-S100:476] S-100 8086 CPU board ordered (finally!)

John,
    I think you meant 82c88-2 and 82c84a in your note below. Please clarify.
Thanks,
Kipp

Sent from my iPad

On Nov 12, 2011, at 2:33 PM, "John Monahan" <mon...@vitasoft.org> wrote:

> That's great Andrew. That board has been our longest running prototype 
> board to date!
> When the board arrives I will put together a board quickly and post 
> "my experiences".
> 
> Most of the board uses common 74LSxx or 74Sxx chips however for the 
> Intel chips could I suggest you order the CMOS chips.
> The original NMOS Intel chips run real hot and cannot really get to 
> high speeds.
> Suggest 80C86 if you can find them or at least an 8086-2 (8MZ chip).  
> Best of all is the NEC V30 CPU. Runs stone cold I think up to 12+Mhz.
> The Bus controller also should be an 80C88-2 and the clock generator 
> an 80C84A  The latter two chips I got from Unicorn 
> http://www.unicornelectronics.com/IC/8000.html
> 
> John
> 
> 
> -----Original Message-----
> From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] 
> On Behalf Of lynchaj
> Sent: Saturday, November 12, 2011 7:23 AM
> To: N8VEM-S100
> Subject: [N8VEM-S100:474] S-100 8086 CPU board ordered (finally!)
> 
> Hi
> 
> I ordered a batch of the S-100 8086 CPU boards.  They should be here 
> in about three weeks or so (late Nov or early Dec).  There are enough 
> boards for everyone who has asked for one plus a few extras for those 
> who arrive late.
> 
> The good news is all the S-100 EPROM (EEPROM, FLASH, SRAM) board PCBs 
> are now gone to their builders.  Thanks to everyone who contributed 
> for the PCB respin project.
> 
> There are still plenty of the S-100 Serial IO board and S-100 buffered 
> prototyping board PCBs left.  However even those are starting to come 
> down to more manageable levels.  There are 19 of the S-100 buffered 
> prototyping board PCBs left and 29 of the S-100 Serial IO board PCBs left.
> 
> John and I are working on the S-100 PC-AT board (also known as the MS- 
> DOS support board) which provides much of the ancillary circuitry of a 
> PC-AT motherboard but without the RAM or CPU.  John should be building 
> and testing the first prototype board in the next few days.  Also the 
> we've ordered an
> S-100 VGA prototype board which should be here soon.
> 
> Neil, Rich, and John are also working on the S-100 68K CPU board.
> John added a bunch of circuitry to support multiple CPU masters on the
> S-100 bus.  Look for an updated S-100 68K CPU board soon.
> 
> Thanks and have a nice day!
> 
> Andrew Lynch
>