Well guys the order for the S100 80386 & RAM boards from PCBCart has arrived from China. One heck of a large order for me (see picture) .
I’m delighted to say that at least for the 80386 CPU board and 32MB RAM board there are no errors. I assembled both boards and they work fine in both of my systems with a 40MHz oscillator. I have not yet built the 8MB RAM board as I am waiting on sockets, but don’t anticipate any problems since there was only one small change from the last prototype. Also I have not tried the 32MB board in a 64MB configuration since I don’t yet have the 4MB X 8 chips.
I have written up the step by step build here:-
These are complicated boards, so take your time building them. I actually have three 80386 CPU boards running here currently. They appear to be very reliable. I have run the Protected mode RAM test overnight a number of times, never a problem. That said, the traces on these boards are quite tight so use little solder and a small tip. BTW for the 80386 board, I had PCBCart use 2X thick copper to distribute the current over the board better.
If you build the CPU board carefully and still have a problem getting it to run after checking it out for obvious problems I will offer to try and debug it for you if you send it to me WHEN I can get some spare time. Most of you on this list are by now seasoned builders, so I don’t anticipate this should happen often.
Now the bad part, I have to try and mail these boards off to everybody! I will pack the boards in padded envelopes with a cardboard backing. The average price per S100 board in the end from PCBCart worked out to be $16/board. I will be also adding Todd’s Mezzanine boards which run at $3/board. Packaging will be $2. Shipping is variable and unknown. When you get your package, note the USPO stamp cost and add it to the total. Use the formula below to calculate your total invoice.
The formula below is what I intend to send. I honestly don’t have time to nickel & dime costs and keep a track of everybody and their payments. I am counting on each of you to use the honor system and forward payments due to my PayPal account at monahan AT vitasoft.org (AT=@).
My current working list is as follows:-
Name, 80386 CPU Board , 8MB SRAM Board, 32/64MB SRAM Board, Mezzanine V06c Boards.
Ian D. 3,3,3,12
Andrew B. 1,1,1,4
Robert G. 1,1,1,4
John M. 3,3,3,12
Matt T. 2,2,2,8
Andrew L. 1,1,1,4
Paul B. 1,1,1,4
If I have your order wrong, first sorry, please let me know ASAP.
PCBCart Final Boards.jpg
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