S100 Computers SD Systems SBC

S100 Computers

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SD SYSTEMS - SBC (Single Board Computer) S-100 card
The SBC-100 & 200 were single board microcomputers designed around the Z80 microprocessor.

SD Systems SBC

The boards operated on the industry standard S-100 bus. The Single Board Computer SBC-200 was well suited for data processing, industrial and process control applications.
The board features included:-

S-100 Bus Compatible Z-80 Central Processing Unit
1024 Bytes of Random Access Memory
8K Bytes of EPROM using 2716
Serial Input/Output Port (with Asynchronous and Synchronous Operation)
Parallel Input and Output Ports
Four Channel Counter/Timer (Z80-CTC)
Software Programmable Baud Rate Generator
No Front Panel Required For Operation
4 MHz Operation

Over time there were three versions of the board. The SBC-100 ran with a 2MHZ clock. The SBC-200 had a 4MHZ clock. There also was (briefly) a SBC-300, but this was a completely different board.

The manual for the above board can be obtained here. The manual for the SBC-100 can be obtained here.

Note, a big difference between the SD Systems SBC-100 and SBC-200: the SBC-100 does not support ROM switch-out! Writing to the control port for it has no effect.

Other SD Systems S-100 Boards
8024 VDB ExpandoRAM ExpandoROM SBC VersaFloppy I & II Z8800 PROM-100
I/O8 Serial Board 4KRAM Other Boards

This page was last modified on 04/14/2022