Mike Schwab writes: >Well, if you are going to convert software, there is the RPG for MVT >that could be ported to 360/20 subset.
I thought of that, but could that compiler run usefully on a 4K Model 20? Swapping, paging, or some other memory shuffling approach would be quite ugly via card I/O. :-) (Glen's museum's Model 20 doesn't have disk or tape, apparently.) The 4K (or 8K) storage was/is really the governing constraint. The Model 20 was available with as much as 32K of storage, but I assume that's not what Glen's museum has. It also depends on what you're trying to accomplish. If the goal is to be faithful to the history, as most museums aspire to be, then it's important to find the genuine Model 20 RPG compiler. If you break that restriction, though, many things are possible. For example, it might be possible (especially with the engineering schematics in hand) to modify a Model 20 to address much more than 32K of storage -- even to wire in newer storage technology to accomplish that modification. But then you wouldn't have a historically accurate Model 20, would you? That's not to say the tiny operating systems I suggested are historically faithful as software. Those operating systems never ran on a real Model 20. They didn't exist during the relevant time period. But they're probably technically possible within a historically hardware faithful Model 20, so they might be interesting proof points. -------------------------------------------------------------------------------------------------------- Timothy Sipples IT Architect Executive, Industry Solutions, IBM z Systems, AP/GCG/MEA E-Mail: [email protected] ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
