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RE: [N8VEM-S100:554] Best place to start building S100 computer?
Welcome on board Dieter.
You can use the transformer/bridge rectifier/capacitor approach. However
also do consider the switching power supply approach. While more expensive
they definitely are a easier to implement and burn off less heat!
I have written up a short account here:-
John Monahan Ph.D
From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On
Behalf Of W3DRK
Sent: Tuesday, December 20, 2011 11:49 AM
Subject: [N8VEM-S100:554] Best place to start building S100 computer?
I am a long time computer user dating back to the days of the 8088.
Back then I saw at least one S100 type computer but never personally owned
one. The thought of owning one has always intrigued me a little bit, and
now thanks to the hard work of Andrew and John as well as others, it looks
like that may be possible with a little bit of work and patience!
I'd like to start by collecting the basic "core" parts such as a power
supply and motherboard and build up from there.
Fortunatly I am friends with someone in the custom transformer field so
getting a decent transformed sized just for this purpose should be pretty
strait forward, and perhaps even less expensive then using 2 or
3 seperate SMPS units. I already have heavy heatsink mounted rectifier
diodes, filter caps, etc so that helps too.
Besides the power supply I guess the next steps would be ordering a
motherboard PCB, Z80 Master CPU PCB, Serial I/O PCB, and a RAM PCB as well
as all nessessary componants. It sounds like the serial I/O PCB is
available now but I'd have to go on a waiting list for the others.
I am fully equipped to build and test these boards--my workbench consists of
EPROM programmers, digital and analog oscillioscopes, function generators,
counters, SMD rework station, etc. I did have a decent logic analyzer until
my old Tek 7603 frame died and took my
7D01/DF2 modules with it. If the need arrizes I guess I can source one of
those USB units.
Does this approach seem like a reasonable place to start?
Dieter Kedrowitsch - W3DRK