You might dump the ROM and look for ascii strings. I've wondered if it was possible to glue strops of tape wide enough to cards for these card readers. Of course, if they were preformatted, it will be a bit more difficult. Dwight ________________________________ From: cctalk <cctalk-bounces at classiccmp.org> on behalf of Bill Newman via cctalk <cctalk at classiccmp.org> Sent: Wednesday, April 1, 2020 9:16 PM To: cctalk at classiccmp.org <cctalk at classiccmp.org> Cc: wcn440 at gmail.com <wcn440 at gmail.com> Subject: Monroe 7860 I know this doesn't count as a general purpose computer, but does anybody have detailed technical information about the Monroe 7860 business calculator/printer? I think it was produced in the early 1980's. Specifically, I'm looking for information about the rom OS for this machine. e.g. are there more built-in commands like "dir". Maybe, is there a basic interpreter I can get at? On the hardware side, does anybody know about the mag stripe paper that the machine is supposed to work with? It appears to store user data on the mag stripe on the paper that it prints on...interesting idea, although limited. Thanks. Bill Newman