Guys that board has been superseded by the “RAM & ROM” board. See here:-
There is nothing particularly wrong with that board (except it is somewhat a bit of a pain to figure out the correct jumpers) but the newer board has things much more organized and has onboard battery backup capability for the static RAM. While it is fine as is, there are a few really minor tweaks that would be nice:-
1. Connect pin 12 of U1D to pin 6 of P31
2. Have ground pin option for pin 20 (CE) of U123
3. Change the order of pins on K2 to avoid the need for wire-wrap
4. Remove bA14 label on U100 and U101 and join U100 pin 28 to U101 pin 28 (both go to P14,7).
If Andrew has time to splice these in, it might be worth waiting for. If so let’s call this board “V2 “
Thanks Tom, I definitely want to go with the newest board version. I didn't notice this second version.
The Group buy is for this board.
Working with John, we fixed a number of issues with the board and it is now a new board called the Ram-Prom board...
I would recommend that you look at this one prior to ordering the older board... It supports, Prom, Flash and Ram, has battery backup and a few more fixes....
On Thu, May 8, 2014 at 4:12 PM, Edward Snider <zipp...@gmail.com> wrote:
I'd like to see what interest we have in getting some S-100 EPROM/RAM Boards made.
This board allows various EPROMs and RAM to to be added to an S-100 system.
Read about it in the link above.
Boards will cost the usual $20ea + $4 shipping.
If anyone is interested, post here or email me (zippster278 (at) gmail.com, and we'll get a list going!