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Morrow - SwitchBoard
This was a general purpose and popular
Interface Board.
![Morrow SwitchBoard](SwitchBoard.jpg)
This board was packed! With the
Switchboard, instead of several IO boards you had one great board. On
a single S-100 card you had:-
-
Two fully independent RS232/TTY
CURRENT LOOP serial ports with sixteen switch selectable baud rates, as well
as switchable stop bit length, parity enable, parity odd/even, and seven
or eight bit word length.
-
One SERIAL STATUS port with four
status bits for each serial port indicating receiver buffer full,
transmitter buffer empty, parity error and over-run error.
-
Four independent PARALLEL I/O ports:
32 lines switch selectable in groups of eight as input or latched output,
with an attention status bit for each group of eight lines.
-
One separate STATUS port with a
latched attention bit for each parallel port, switch selectable to latch on
a positive or negative pulse or level; with each attention status bit reset
automatically by an input reference to its associated port.
-
One separate STROBE port with eight
independent 500 nanosecond strobe lines, each switch selectable as a
positive or negative strobe.
-
Optionally 4K of 2114 static RAM
guaranteed to run at 4MHZ.
-
PHANTOM DISABLE switch selection to
allow PHANTOM line to disable on board RAM and EPROM.
-
Room for 4K of 2708 EPROM to
boot! Wait states insertable!
The board used a block of 8 I/O ports
switchable to any 8 byte boundary. The board could hold up to 4 2708
EPROMS addressable at any 4K boundary.
The very clear and well written manual
for this board can be obtained
here.
Morrow S-100 Boards
24K RAM
64K RAM
Disk Jockey FDC
Multi I/O
SuperRAM
SwitchBoard
Z80 Board
Hard Disk Controller
This page was last modified
on
01/08/2011