21 Dec
2008
21 Dec
'08
8:51 a.m.
On Dec 20, 2008, at 11:46 PM, Alexandre Souza wrote:
- It has a 50-pin card edge connector (Lisa, maybe?)
I'm not sure what the mystery is. It fits a Lisa, and was used to
download software to the early prototypes of the Macintosh.
http://www.digibarn.com/collections/diagrams/early-mac-interfaces/index.html
The earliest Lisa prototypes had 50-pin edge connectors for the I/O
expansion cards. Sometime between 7/81 and 2/82 the Lisa got the pinch-
fit, 56-pin edge connector for I/O expansion cards that it eventually
shipped with. The collection of diagrams at DigiBarn (from which the
flickr image was nicked) shows this evolution pretty clearly.
ok
bear