As Monroe Systems is still in business. Contact them, they might have an historian that could help you. https://monroe-systems.com
Also, there a brochure for sale on ebait. There is a preview of 4 pages that supplies some general info (for free) https://www.ebay.com/itm/VINTAGE-1983-MONROE-7860-DESKTOP-ACCOUNTING-CALCULATOR-BROCHURE-23-LB-32-CHAR/381996877124?hash=item58f0c9c544:g:NTAAAOSw32lYwl6G In 1972, I programmed Burroughs L3000 accounting machines that could read magnetic ledger cards. I wonder if the Monroe could use the same kind. Wayne -----Original Message----- From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Eric Smith via cctalk Sent: Thursday, April 2, 2020 2:05 PM To: dwight; General Discussion: On-Topic and Off-Topic Posts Subject: Re: Monroe 7860 On Thu, Apr 2, 2020 at 11:27 AM dwight via cctalk <cctalk@classiccmp.org> wrote: > 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. > I have a few reels of two-inch video tape which I've used to make crude magnetic cards for old HP desktop machines.