12 Dec
2020
12 Dec
'20
10:14 p.m.
On Sun, Dec 13, 2020 at 12:12 AM Ethan Dicks via cctalk
<cctalk at classiccmp.org> wrote:
On Sat, Dec 12, 2020 at 11:08 AM Chris Zach via cctalk
<cctalk at classiccmp.org> wrote:
The original Model 100 took special RAM modules. Each was a ceramic
substrate with 4 6116 RAM chips (surface mount) soldered on. All
address decoding was on the M100 main PCB, the modules had 4 chip
select lines, one for each RAM. These modules are 0.7" wide, so even
if you cut traces and modify the address decoder to use 8K RAMs of the
6264 type, you have to bend pins and socket strips to get them to go
in.
The Model 102, I think, used 6264s
-tony
Wow, that could upgrade so many deserving TRS80
Model 100's....
(always liked the basic simplicity of SRAM boards)
(I saw the correction that followed)
What SRAM was used in Model 100 upgrades? 6264? 62256? Or just
plain old 6116?