On Sat, Apr 28, 2018 at 3:57 PM, Anders Nelson via cctalk <cctalk@classiccmp.org> wrote: > Hey all, > > I have an IBM 5140 portable with a printer but I'd really like to use it as > a terminal among other things. Any chance there's documentation available > for that Centronics connector or another internal header with RS232 or > whatever?
I've never seen schematics for this machine (and as I don't own one, I haven't reverse-engineered it). However there is a technical reference manual, 6280655_PC_Convertable_Technical_Reference_Volume_1_Feb86.pdf which I think I got from Bitsavers. Page 46 and following of that .pdf (page 2-37 and following of the original manual) give the pinout and signals on the 'I/O Channel connector' which I think is the one you are asking about. Looks to be pretty much the 8 bit ISA bus signals. It's a 72 pin connector, good luck in finding something to fit it! -tony