I assume zmodem is out of the question for an 8085 with 32k of main rom which is mostly already used up by...main rom.
On Tue, Sep 11, 2018 at 6:39 PM John Gardner <gof...@gmail.com> wrote: > ...If you could make room for only one thing in the main rom, would it > be a tpdd dos, or xmodem? > > How about Z-Modem? "8) > > On 9/11/18, Kurt McCullum <ku...@fastmail.com> wrote: > > UR-II and Sardine both have TS-DOS code that is stripped down to the > > bare minimum. Basically just a loader for a specific filename (DOS100.CO > > or SAR100.CO). Sardine has the same loader plus a couple other features. > > The TPDD protocol works. It may not be the 'standard' for anything but > > our Model-Ts but after all these years that's what we've got. Having TS- > > DOS in ROM solves a lot of problems. > > Kurt > > > > > > On Tue, Sep 11, 2018, at 3:19 PM, Brian White wrote: > >> If you could make room for only one thing in the main rom, would it be > >> a tpdd dos, or xmodem?> > >> Remember, tpdd was only one of a few different kinds of disks, it's > >> only a sort of defacto standard now because of various reasons, > >> probably mostly because it works over the serial port and the protocol > >> was simple enough to be reverse engineered and re-implimented by > >> others, making all the emulators possible.> If I had to choose one thing > >> to go right into the main rom, I think I > >> might actually go with xmodem or y or zmodem or kermit etc, some > >> standard generic binary capable serial protocol, rather than tpdd. And > >> rts/cts support in TELCOM & BASIC.> That's probably the single thing > about > >> the 600 that I like. It has > >> xmodem built in to it's telcom app, and that makes it no problem to > >> recover from resets any time any where. You can regenerate the utility > >> disk and install BASIC from scratch with just a serial cable and the > >> downloaded files.> What other things would people say should be in > there, > >> after 30 years > >> of hindsight? How about, rather than some more software baked in, just > >> more, and more useful hooks? Like how UR2 loads TS-DOS without > >> containing TS-DOS, or like the few hooks that do exist that the DVI > >> uses, but more and better?> How about... the MFORTH rom with a minimal > set > >> of baked-in features, > >> maybe implemented in forth themselves. Like right now there are a > >> bunch of ML routines that various utils and BASIC all use, while this > >> would be forth has all the ml, and everything else just uses forth. > >> And the bulk of apps and utils would be forth programs in ram and as > >> little as possible in rom. Use as much of the rom space as possible to > >> make forth itself as good as possible. And the rom just has enough > >> features baked-in to make it easy to load the real apps from elsewhere > >> any time.> I guess really I wouldn't want any rom at all except just > >> something > >> tiny that didn't do anything except load the real "os" from somewhere > >> else, so you could do that forth idea and then have an updated forth > >> the next year, but I'm trying to stay within the context of 1983 and > >> Tandy's cost and time limits.> > >> > >> > >> On Tue, Sep 11, 2018 at 4:03 PM Kevin Becker > >> <ke...@kevinbecker.org> wrote:>> SCHEDL and ADDRSS could both go for > me, > >> but I suspect they are > >>> pretty small>> > >>> On Tue, Sep 11, 2018 at 3:56 PM, you got me > >>> <ven...@hotmail.com> wrote:>>> would ts-dos fit on the main rom if > >>> SCHEDULE was taken off? Who > >>>> uses that?>>> > >>>> *From:* M100 <m100-boun...@lists.bitchin100.com> on behalf of Kurt > >>>> McCullum <ku...@fastmail.com> *Sent:* Tuesday, September 11, 2018 > >>>> 7:42:24 PM *To:* m100@lists.bitchin100.com *Subject:* Re: [M100] > >>>> call for programs and games>>> > >>>> > >>>> This brings a question to mind. The Tandy 200 and NEC 8201 (and > >>>> 8300) have multiple banks. Since the 27c512 is identical to the > >>>> 27c256 ROM with the exception of pin 1 which is for address 15. > >>>> Could a 27C512 be inserted with pin 1 bent to stick out to the side > >>>> and then a wire run from pin 1 to the enable pin of bank 2? So > >>>> switching banks also switches OptRoms?>>> > >>>> I have read an article about installing a switch to do this but I > >>>> wasn't sure if this could be done by taping the existing hardware.>>> > >>>> Kurt > >>>> > >>>> > >>>> On Tue, Sep 11, 2018, at 9:36 AM, Mike Stein wrote: > >>>>> > >>>>> Another simple approach that's often used is to have an adapter > >>>>> with an (E)EPROM large enough to hold several ROM images and a > >>>>> physical (or logical) switch to select among them (essentially what > >>>>> my adapter does, but with only one OptROM image).>>>> > >>>>> Unfortunately there's very little vertical clearance in these > >>>>> babies so there's not much room to use the old trick of stacking > >>>>> several chips with the select lines brought out the side. I haven't > >>>>> looked at my T102 but in the M100 there is enough room for one piggy- > >>>>> backed chip which would give you at least three 32KB OptROM images, > >>>>> but it does lift the keyboard slightly unless you remove the > >>>>> socket; depending on the socket used you might also gain some > >>>>> clearance if you trim the IC leads.>>>> > >>>>> Another approach to using several and/or larger ROMs is to make a > >>>>> little board that puts the chips upside down in the space beside > >>>>> the system ROM; as a matter of fact the plan with this prototype > >>>>> board was to add another RAM or ROM socket beside the existing > one:>>>> > >>>>> > >>>>> > >>>>> > >>>>> > >>>>> > >>>>> ----- Original Message ----- > >>>>> From: "Greg Swallow" <gswal...@mchsi.com> > >>>>> To: <m...@bitchin100.com> > >>>>> Sent: Tuesday, September 11, 2018 9:34 AM > >>>>> Subject: Re: [M100] call for programs and games > >>>>> > >>>>> > Multiple ROMs would be easy enough with a REX. Of course if the > >>>>> > REX goes, you could be out of luck.>>> > >>>> > >>> > >> > >> > >> -- > >> bkw > >> Email had 2 attachments: > > > > > >> * C2.JPG 23k (image/jpeg) > >> * ComboC6.JPG 11k (image/jpeg) > > > -- bkw
