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

Reply via email to