Yeah, the XR4 would certainly expand the options (pun intended) but I never quite figured out how they selected among the images; I did work out another solution and started building a 16MB RAM expansion but never actually finished or tested any of it. Things like REX, the Backpack and the Dial-a-ROM are a lot easier ;-)
The issue is that when TS-DOS is in (the single) ROM space it would get clobbered by loading another ROM image there; I'll have to have another look at it all, including the EME tools, to see how it might work. Am I missing something? BTW, I haven't used my REX in years; AFAIR it's the original version with the System ROM replacement option and I guess there's not much support for that these days? m On Sun, Feb 26, 2023 at 12:14 AM Stephen Adolph <twospru...@gmail.com> wrote: > Mike, not sure I follow. > You know you can have multiple ram spaces in option locations. Like xr4. > Could an xr4 do what you want? > > Xr4 was a tidy solution. Needed a few wires to make it work. > > I guess I don't understand why tsdos is not compatible with option ram? > Seems like it is, just like any other rom program? > > > > On Sunday, February 26, 2023, Mike Stein <mhs.st...@gmail.com> wrote: > >> As you may remember, years ago I designed an adapter that let you put >> both the system image and an option ROM image into a single chip that >> replaced the System ROM, both the standard (new) or non-standard (old) >> version; some folks on here may even still have one in their M100, probably >> loaded with TS-DOS. >> >> In another M100 I replaced the option ROM with RAM and load/save/copy >> etc. various ROM images using the EME extRAM tools, but of course I can't >> have TS-DOS in the same memory area as the option ROMs. >> >> The Dial-a-ROM and REX are certainly excellent solutions, but I'd still >> like to make the Option RAM concept compatible with TS-DOS, even if I have >> to add or reuse a physical switch to select between RAM and ROM. Any other >> ideas? >> >> m >> >> >> >> On Sat, Feb 25, 2023 at 11:26 PM John R. Hogerhuis <jho...@pobox.com> >> wrote: >> >>> >>> >>> On Sat, Feb 25, 2023, 8:18 PM Mike Stein <mhs.st...@gmail.com> wrote: >>> >>>> Yeah, I guess everybody has TS-DOS in ROM one way or another these >>>> days; I've thought about putting it in the system ROM instead of the >>>> Scheduler and Address Book, but removing them doesn't really free up much >>>> space; maybe Teeny would fit... >>>> >>>> >>> Scheduler and address book are a very simple "grep" type utility serving >>> as a simple database. I feel they are too clever and minimalist a solution >>> to remove :-) plus there are programs that let you use this search facility >>> on any text file. >>> >>> -- John. >>> >>>> >>>>
