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Re: [N8VEM-S100:3812] An 80386 master/Slave CPU baord with 8 or 32 MB Static RAM boards

Hi John,

If you're looking for someone to do a larger board order (of the 80386
board and the two SRAM boards) I'm happy to do so.

If not, then I'm interested in three of each of the boards.



* monahanz <mon...@vitasoft.org> [140529 00:59]:
> Well it looks like it's finally done. After some 6 prototype boards and one 
> year later it looks like we now have a completely functional S100 bus 80386 
> board.   This board runs on a 21 slot motherboard at 9MHz for all 
> interrupts, I/O ports and RAM from 0 to 16MB.  For the remaining RAM (up to 
> 4GB for the 80386) the CPU runs at 36MHz (in pipeline protected mode) and 
> 32 bits wide via two above board cable connectors.  
> A complete description of the board can be found here:-
> http://s100computers.com/My%20System%20Pages/80386%20Board/80386%20CPU%20Board.htm
> There is also a short video of the board in operation towards the bottom of 
> the page.
> A major component of this effort was writing the 80386 monitor.  It's in 
> fact surprising how little example code there is out the demonstrating the 
> setting up the 80386 to switch from real to protected mode.   This is 
> written up here:-
> http://s100computers.com/Software%20Folder/80386%20Monitor/80386%20Monitor.htm
> The board currently works with two static RAM boards that sit in the bus 
> but communicate directly (and only) with the 80386. The capacity of these 
> boards are 8 and 32 MB's. These are described here:-
> http://s100computers.com/My%20System%20Pages/80386%20-%208MG%20RAM%20Board/8MG%20Static%20RAM%20Board.htm
> http://s100computers.com/My%20System%20Pages/80386%20-%2032MG%20RAM%20Board/32MG%20Static%20RAM%20Board.htm
> A big thanks goes out to Andrew Lynch at N8VEM (
> http://n8vem-sbc.pbworks.com/w/page/4200908/FrontPage) for laying out the 
> many prototypes these boards took.  Thanks Andrew.
> I will be ordering a few "commercial quality" boards for myself.   If 
> anybody else would like one of these boards they can let me know.  *However 
> be aware that these boards are not only complex but expensive to build*.  
> The boards themselves are the smallest part of the whole equation.  The 8MB 
> static RAM board is a rock solid board and great for testing out the 
> hardware and software but those Alliance Memory Inc.  512x8 static RAM 
> chips cost about $20 each.   The 32MB board on the other hand has 4 times 
> the capacity for about the same price but uses SMD chips.  
> Next up is an 80486 board and the real challenge a 4GB DRAM board!
> Enjoy
> John Monahan
> . 
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