On 03/08/2018 05:38 PM, Paul Berger via cctalk wrote: > Hmmmm I don't remember my original PC having all the chips in sockets > nor do I recall it having 64Kb DRAMs. I clearly recall that it had > one bank of 16Kb DRAMs soldered down and sockets for three more banks > of 16Kb chips. The only other sockets on the board where for the ROM, > CPU, and math coprocessor. hardly a fathful reproduction. > > Paul. >
Paul, That is the rev-b still 5150 but the next 4 digits are that hardware it was. your correct the first version only took 16k Drams x4 banks (64K). It was very obvious that was way too little and a "few" revs were done to use 64K and later 256K parts. Personally why would any one want to build that? It ran at 50% of what the 8088 could do in the day and was memory poor. I know that as I was running a Multibus 8088 at 8mhz just as that was introduced. That was faster. Allison > > On 2018-03-08 6:30 PM, Liam Proven via cctalk wrote: >> This turned up on Fess Bouc yesterday and it was news to me. >> >> It's a DIY replica of an original IBM PC motherboard: >> >> http://www.mtmscientific.com/pc-retro.html >> >
