Peter, Yeah, I was hoping, but UPC.CO does trample on top of FLOPPY. Even with any efforts to re-locate it to another segment of memory. Should've took to heart a clue in the TPDD2 manual noting FLOPPY is not for use/compatible with the DVI.
God Bless, GregS <>< Apr 2, 2021 4:32:45 PM Peter Noeth <[email protected]>: > Greg, > > Memory conflicts have always been a problem in earlier computers with TSR > (Terminate and Stay Resident) drivers. It wasn't until the "Microsoft > Windows" era that methods of more sophisticated Memory Management were > created that alleviate much of this. > > Problems for this class of Operating System are: - * > No real Memory Management. Software designers figured that reserving some space from the Top of Memory would be a safe place to put their TSR code, as normal programs and data grow from a lower point in memory towards the top. - * > The 80C85 does not have a Jump Relative command. So all program jumps must be absolute. This prevents these TSR programs from being moved in memory to another location without being re-assembled to operate from a different range in memory. > The only way to make the two TSR drivers/programs play together is to have > the source of one of them, and re-assemble; or to disassemble one of them to > create a source file, that could be edited and re-assembled. There are people > on this list with the tools that could do this, but I am not going to > volunteer anyone. > > Regards, > > Peter > >> >> >> ------------------------------ >> >> Message: 3 >> Date: Thu, 1 Apr 2021 22:34:41 +0000 (UTC) >> From: Greg Swallow <[email protected]> >> To: [email protected] >> Subject: [M100] TPDD2 (FLOPPY) vs Barcode Wand (UPC.CO[http://UPC.CO]) >> Message-ID: <[email protected]> >> Content-Type: text/plain; charset="utf-8" >> >> All, >> >> Working on the proof-of-concept for using barcode at work again. Changes in >> management had forced a pause. New super/lead likes the idea even more than >> previous. >> >> Am trying to use TPDD2 to store BASIC and barcode softwars for 3 M100. >> Trying to figure relocating barcode module UPC.CO[http://UPC.CO] to work >> with FLOPPY. Since the TPPD2 file manager is somewhat different in TOP, END, >> and EXEC addresses to identify all FLOPPY segments, I thought maybe someone >> could help with getting them to work together. And, avoid too much >> trial-and-error. >> >> Normally (without FLOPPY) UPC.CO[http://UPC.CO] is loaded after a CLEAR 110, >> 61784 statement. This will cause an AO error (I think it was) with FLOPPY >> loaded. I have been able to get UPC.CO[http://UPC.CO] on a floppy with >> READBC.BA[http://READBC.BA] and my code. I am hoping something like CLEAR >> 110, MAXRAM will set a proper loading point and avoid loading on top of any >> part of FLOPPY. The TOP of UPC.CO[http://UPC.CO] should then be at MAXRAM+4 >> with END and EXEC adjusted and savable with new numbers. At least I hope so >> and I am understanding it. >> >> Please. Any advise or wisdom, even a smack on back of my head, is welcome. >> >> God Bless, >> >> GregS <>< >>
