About
two years ago Andrew and I made an S-100 bus E-PROM board that could
utilize a number or RAM and ROM chips. It proved very popular. All
production quality boards were quickly taken. A second "V2" version of
the board was later made. That too went quickly.
A number of people have requested an "All in One" RAM/ROM
combination board capable of working in 8 or 16 bit S-100 systems with
pre or post IEEE-696 CPU boards and capable of accepting a wider range
of UV-EPROMS, EE-PROMS, Static RAM chips and Flash-RAM chips. Also in
view of the range of chips and CPU's a flexible wait state circuit that
can independently assign 0-8 wait states to the above chips would be
desirable. Finally, it would be nice if the EPROMs could be
phantom/shadowed in or out depending on which CPU is controlling the
S-100 bus. For example one normally would not want a Z80 monitor at
F000H if the bus has given control to an 8086 in a 1MG address space.
See here for a description of such a board:-
http://www.s100computers.com/My%20System%20Pages/RAM&ROM%20Board/RAM&PROM%20Board.htm