Glad you got it working Gary. To make things even more complicated I find that I can boot the IDE board/MSDOS with the jumpers using either 1-2 or 3-4. (Using our old 4MB Static RAM board). I suspect it’s more to do with your RAM board(s) than the IDE board. In the past I found for example that some of the Godbout RAM boards were more finicky than our own with respect to these jumpers. In the 1-2 positions could you get the 8086 monitor “N” command diagnostics to work? John From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf Of Gary Kaufman
Sent: Wednesday, June 24, 2015 3:15 PM
To: n8vem...@googlegroups.com
Cc: mon...@vitasoft.org
Subject: Re: [N8VEM-S100:7310] V3 IDE with MSDOS Hopefully this will save others a bit of head-scratching!
*** To boot the IDE V3 board into MSDOS using the 8088 board requires the K5/6/7/11 "Full Latch" jumpers are set in the 2-3 position. ***
With this setting I was able to boot at 10.6mhz (32mhz oscillator) and the V3 IDE board is rock solid. This was using 82C84, 82C88, NEC D70108HCZ-16 V20 16mhz processor, and the 4mb SRAM board using 45ns RAM and only a single wait state for both EEprom and I/O.
Thanks John and others for a great collection of boards.
- Gary
On Wednesday, June 24, 2015 at 10:21:00 AM UTC-4, Gary Kaufman wrote: This may be a duplicate post, thought I replied from home this morning but I don't see it in the forum.
John sent along a photo of his 8088 board, and I had the K5/6/7/11 "Full Latch" jumpers in the 1-2 position - switched them to the 2-3 position to match John's board and the 8088 booted MS-DOS just fine. I only had a few moments before work today and will do more testing tonight - but this looks like it was the issue.
- Gary
On Wednesday, June 24, 2015 at 6:59:24 AM UTC-4, David Fry wrote: It just so happens that I am in the middle of building up my V3 S100 IDE/CF board as well. I don't have all the components to complete it yet so will be placing a parts order in the next day of so, may be able to advise by the weekend but don't hold your breath, remember that my 8088 board is not totally stable, it's an issue I need to get back to now that I have a logic analyser to so if I can track down All the same, I have 8088, 80286 80386 and Z80 CPU cards and I will post feedback hopefully by the weekend. David Fry
On Wednesday, June 24, 2015 at 12:26:51 AM UTC+1, Gary Kaufman wrote: A bit more information...
Just tried it with a few other boards - it boots fine with the 80286, boots intermittently with the "Cyrix 80386", but I can't get it to boot with either AMD80386, 8088 or NECV20/8088 boards.
I also tried swapping 82C55's with several other brands and both ALS and F parts.
Also tried changing the 8088 CPU to 4.77mhz and various wait state settings for I/O both on CPU and IDE board.
- Gary
On Tuesday, June 23, 2015 at 6:05:35 PM UTC-4, monahanz wrote: For what it's worth Gary, just tested it with my 8088 (for the first time!). Works fine.
Unfortunately I'm winding things down here for a 2 week vacation in Europe. Not back until mid-July. So I won't be able to help much, but I have been using this board in all kinds of situations in the past few weeks, never a problem, even a new V2 CPLD driven 80386 prototype at 10MHz on the bus. One thing though, this is a second batch of boards made by PCBCart. It's the same Gurber files so there should be no changes, but you never know. Dave Fry, you are the only one with the first batch board. Do you have our 8088. Also can some other users out there check their 8088 with this board.
John
-----Original Message-----
From: n8ve...@googlegroups.com [mailto:n8ve...@googlegroups.com] On Behalf Of Gary Kaufman
Sent: Tuesday, June 23, 2015 2:16 PM
To: n8ve...@googlegroups.com
Subject: [N8VEM-S100:7300] V3 IDE with MSDOS
Looking for troubleshooting ideas....
I've put together the V3 IDE board, and it works perfectly with CP/M and the Z80 board.
Both IDE slots work fine in CP/M and I'm using the same flash memory cards and SYBA adapters as I used with the V2 card.
Unfortunately I can't get it to boot MSDOS.
Using an 8088 CPU card.
The card won't access properly using QO33,80/QO32,2B/QO30,00 etc either under the 8088 but works perfectly using the Z80.
I've tried swapping cards, adding I/O wait states on both IDE and CPU cards, swapping GAL's, swapping IC's, stripping most other boards from the system etc.
Thanks in advance for any ideas.
- Gary
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