A replacement for SEMI4804 static RAMs on the TDL SMB
Designed by Glitch Works, LLC in United States of America
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The GW-SMBRAM-2 is a replacement for the four SEMI4804 static RAMs found on TDL SMBs, a S-100 board from the 1970s. The SEMI4804 was in short supply even when the TDL SMB was new (TDL had their own r…
Read More…The GW-SMBRAM-2 is a replacement for the four SEMI4804 static RAMs found on TDL SMBs, a S-100 board from the 1970s. The SEMI4804 was in short supply even when the TDL SMB was new (TDL had their own replacement board). Nowadays, the SEMI4804 is all but unobtainable. The GW-SMBRAM-2 replaces all four SEMI4804s with a single modern, reliable, low-power 6116 type static RAM in a 300 mil package.
The GW-SMBRAM-2 is slightly larger than the RAM socket area on the TDL SMB and does not interfere with any of the surrounding components. It uses Aries 18-600-20 DIP headers with coined (flat stamped) terminals, so that insertion does not destroy original sockets on your TDL SMB. Unlike the original TDL replacement board, the GW-SMBRAM-2 does not require a flying lead for power: the use of modern low-power SRAM allows it to run from only the power supplied from the existing RAM sockets.
The kit includes all parts needed to build the GW-SMBRAM-2, you supply the tools and solder. Select "Assembled and Tested" if you'd like us to build and test the board ($15 charge). You can read about the design process and the creation of the earlier GW-SMBRAM-1 here.
The first image in this listing shows the kit you will receive. The second shows the assembled version, and the final image shows the GW-SMBRAM-2 installed in a TDL SMB.
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