Will
As writer of M100 CP/M I can say there currently isn't any user-friendly
way of calling M100 ROM routines from CP/M. However Steve may have
discovered a sneaky access in the BIOS with his extensive experience of
hacking about with the M100.
It's on my to-do list, along with other improv
Will,
The M100 main rom supports CP/M, i suppose that is obvious.
Cpm memory space is totally separate from the M100 memory. Both the upper
and lower 33k banks are RAM for cpm. In m100 mode, you have the standard
main rom in the lower 32k, and different ram in the upper 32k.
To get full control
Hi All,
I've been digging into assembly language programming on the M100 and the
documentation is fragmented, to say the least and so progress is stilted
a bit. I've made significant progress on the programming toolchain -
CP/M is great for this. It gives a rational file system, ed, asm, load,
Also this
As shipped, the default setting for the Retro-Printer is to expect 8 bit
data - however, some equipment only sends 7 bit data (and the 8th bit can
be quite temperamental).
Changing the bit_depth parameter for the Retro-Printer Module will address
this
On Sun, Mar 17, 2024, 8:48 PM Grego
Adapter was made because there was a board error on the original board. So
this adapter fixes whatever was wrong. I'll see if I can get the details
for you.. If it turns out to be the adapter I could probably get it
replaced for you if need be or repaired.
On Sun, Mar 17, 2024, 6:47 PM Will Senn
I carry the kits at arcadeshopper.com
On Sun, Mar 17, 2024, 7:15 AM Will Senn wrote:
> All,
>
> I went hunting today and couldn't find one, but is there a kit available
> still?
>
> Is this still the list I need (https://wiki.console5.com/wiki/TRS80) and
> are they all electrolytic?
>
> C49 1
Hi Everyone--
My 102 has a failed "," key - all the other keys seem to work so I am
guessing it is a bad key or broken trace.
What say ye?
Thanks!
Ron.
Bounces?
On 3/16/24 18:21, Doug Jackson wrote:
Every time I see one of those evil NiCad batteries, I replace it with
a 0.5F supercap.
I have never had an issue with my M100, or with the Olivetti
equivalent (number escapes me at the moment)
Having said that, the oldest would have been 8 year
All,
Looks like it was a problem with the adapter. My theory that bits 2 and
3 were shorted (oh, that's right, not my theory, but Steve's) was
confirmed with a few more character test. So, I posted in the retro
printer board, sent several 'contact us' posts to the retro folks (their
site suck
So... I got out the multimeter and started testing the pins on this
adapter thingy that the retroprinter comes with and sure enough pin 4 on
male side maps to both 4 and 5 on the female side and pin 5 on the male
side goes to both 4 and 5 on the female side - as I read it
(https://pinoutguide.c
Bit 2 shorted to bit 3?
On Sunday, March 17, 2024, Will Senn wrote:
> I tried every config setting... twice or more :).
>
> It's super consistent in that bits 2, and 3, counting from zero, from the
> least significant bits, are having some kind of issue (they aren't always,
> zero, or one, but t
Yeah, definitely something amiss with bits 2 and 3. When I looked at a few
characters it happened that they all became 0 instead of 1 and it was just
dropping bits, but apparently it's also reading a 1 instead of 0 in some
cases.
The M100 printer port is not 100% Centronics-compatible and it's als
I tried every config setting... twice or more :).
It's super consistent in that bits 2, and 3, counting from zero, from
the least significant bits, are having some kind of issue (they aren't
always, zero, or one, but they are always the bits that are wrong and
they are consistently wrong (of t
Yep, it's consistent. It took me a while to make some progress on this.
I tried redoing the Centronics side of the cable, and here's my source
vs what the pi sees:
10 PRINT "Hello, world!"
20 GOTO 10
10 PRMN\ "Lmllo, orll!"
20 OO\O 10
I'm not sure how to troubleshoot...
I found this in the
Thanx Jeff. I have two M100's that need to be recapped. This will be very
helpful.
Jeff Lawrence
On Sunday, March 17, 2024 at 02:01:58 PM EDT, bir...@soigeneris.com
wrote:
I made a color-coded capacitor map 4-5 years ago. It shows you where the
various caps are, their values and
These are very nice. Thank you.
bkw
On Sun, Mar 17, 2024, 2:01 PM wrote:
> I made a color-coded capacitor map 4-5 years ago. It shows you where the
> various caps are, their values and physical size. I am in the process of
> updating it to be more like the newer maps I have created which also s
I made a color-coded capacitor map 4-5 years ago. It shows you where the
various caps are, their values and physical size. I am in the process of
updating it to be more like the newer maps I have created which also show
polarity and a few of the part numbers shown are obsolete but with the info
I just ordered one from here, (following a recommendation from this mailing
list - thank you!!) and they still have some in stock...
https://console5.com/store/tandy-radio-shack-trs80-model-100-102-cap-kit.html
Jason
--
Jason S. Jorgenson, Ph.D
jjorgen...@gmail.com
On Sun, Mar 17, 2024, 8:
All,
I went hunting today and couldn't find one, but is there a kit available
still?
Is this still the list I need (https://wiki.console5.com/wiki/TRS80) and
are they all electrolytic?
C49 10uF16v
C50 10uF16v
C52 1uF 50v NP
C54 10uF16v
C55
Four or five years ago I did a video about using a supercap on am M100 and go
over estimating the backup time based on the size of the cap. Supercaps have a
high self-discharge rate so it will lose a sizeable part of the charge after a
few days even when not in use. Parts list is in video descri
Is it consistent, i.e. do you always get the same garbled output for a
given file?
At a fast glance it looks like bits 2 and/or 3 are being dropped; have you
checked the computer to Pi cable and connectors?
m
On Sun, Mar 17, 2024 at 2:14 AM Will Senn wrote:
> I am finally coming back around to
Hey Gang,
It has been quite a while since I have made any updates / releases to
VirtualT. I have some local changes where I was implementing a "Dark
Theme" to make all of the dialog boxes a black background with light
letters. This was an effort I believed I needed because I was unable to
s
> On Mar 16, 2024, at 10:37 PM, B 9 wrote:
>
> Is Virtual T no longer being released by the original developers? (Ken Petit?
> Stephen Hurd?)
I am not the upstream by any stretch of the imagination, but I am also
maintaining what I think is the "best of breed" fork with as many of the
patche
This is the standard part I use:
https://au.mouser.com/ProductDetail/PowerStor-Eaton/KR-5R5V334-R?qs=9GX7soZQXxEDr%252BE08UDVYA%3D%3D
Kindest regards,
Doug Jackson
em: d...@doughq.com
ph: 0414 986878
Follow my amateur radio adventures at vk1zdj.net
On Sun, 17 Mar 2024 at 21:48, r cs wrote:
Can you tell us more about the "supercap"? What is the part called and
does anyone know where these can be purchased? How long does the memory
last as compared with a more traditional battery?
Thanks!
rcs
On Sun, Mar 17, 2024 at 2:52 AM Brian White wrote:
> It should definitely at least be op
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