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Re: [N8VEM-S100:1545] An 80386 CPU and RAM board for tthe S-100 Bus
The S-100 80386 CPU & SRAM boards should really be considered a set. While the S-100 80386 CPU board could in theory be used by itself on the S-100 bus the need for a lot of fast local memory is going to pretty much force a local memory board solution of some kind. Otherwise the memory access times will be painfully slow.
The 8MB SRAM board is a start in the right direction but realistically it is going to have to get larger to be practical. There was quite a bit of discussion about a DRAM based board a while back. I am guessing we'll make an PSRAM board next or soon as an intermediate step to a full up DRAM or SDRAM board. Memory size has to increase and we are taking incremental steps to get there.
Local DRAM and/or SDRAM add a lot of complexity due to the multiple bus master nature of IEEE-696. It is not a simple problem that much we know for certain. Most likely it is going to involve some here-to-fore unheard of changes like SMT parts, programmable logic, etc.
As John pointed out earlier, we really need a VGA solution to make this work.
On Tuesday, April 16, 2013 2:11:17 PM UTC-4, bob wrote:
Just to help with a rough demand count, please add me to your list of people wanting:
1) The 386 board.
2) The daughter board to the above board.
I would like 1 of each of them (2 boards total).
I'll keep watching to see when the official order request comes out.
Kudos for the excellent work you guys are doing!