From Newsgroup: comp.os.cpm

If anyone remembers this thread from 14 years ago (https://groups.google.com/g/comp.os.cpm/c/0BL6xxXSAZc/m/htpJcex4eRQJ),
MOVCPM was broken for many Kaypro models and won't resize your TPA. One
of the main reasons for wanting to resize CP/M is because the KayPLUS
ROM image requires a 62k TPA while Kaypro's TPA is set for 63k.

I finally got around to investigating this problem and dissembled the
original MOVCPM. In my version of CP/M for the Kaypro 4-84 (2.2F),
Digital Research had hard-coded MOVCPM to always create 63k TPAs
regardless of what parameters you gave it.

I fixed the program to properly relocate CP/M to support any size TPA.
The new program is called KMOVCPM.COM and you can get it here: https://github.com/eneilson-zz/8-bit-projects/tree/main/cpm/kmovcpm

It assembles with ZMAC on any PC and then you can use cpmtools to
transfer the .com file to a disk image. Pre-built binaries are also in
the repository. Enjoy!

ECNeilson

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From Newsgroup: comp.os.cpm

Am 09.02.2026 um 15:49 schrieb ECNeilson:

It assembles with ZMAC on any PC and then you can use cpmtools to
transfer the .com file to a disk image. Pre-built binaries are also in
the repository. Enjoy!

ECNeilson

I have no longer a Kaypro but like it.

Nice done, thank you.
--
-- Fritz
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From Newsgroup: comp.os.cpm

On 2/9/26 1:47 PM, John wrote:

I have 2 Kaypros, and definitely appreciate the work!
Thanks,
-J

If you like Kaypros, I have something very cool to share :)

I just finished a project that extends a Kaypro II emulator written by a fellow named Ivan Izag to support Kaypro 4/84, 4-84, TurboROM-84 and
KayPLUS 84 Kaypro machines. I also added SIO serial port and RTC support
for the 4 models. It's written in Rust and currently runs on MacOS and
Linux - Unfortunately, the cross-OS terminal package (crate) that would
also support Windows runs very slowly, so no Windows support at this
time. You can check it out here:
https://github.com/eneilson-zz/izkaypro

ECNeilson
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From Newsgroup: comp.os.cpm

On 2026-02-14, ECNeilson <eric@neilsonhart.com> wrote:

On 2/9/26 1:47 PM, John wrote:

I have 2 Kaypros, and definitely appreciate the work!
Thanks,
-J

If you like Kaypros, I have something very cool to share :)

I just finished a project that extends a Kaypro II emulator written by a fellow named Ivan Izag to support Kaypro 4/84, 4-84, TurboROM-84 and
KayPLUS 84 Kaypro machines. I also added SIO serial port and RTC support
for the 4 models. It's written in Rust and currently runs on MacOS and Linux - Unfortunately, the cross-OS terminal package (crate) that would
also support Windows runs very slowly, so no Windows support at this
time. You can check it out here:
https://github.com/eneilson-zz/izkaypro

ECNeilson

Wow. So if it emulates Kaypro will it run the Rembrandt graphical software that I seem to recall came out for Kaypro near the end? (I might be mistken about that).

We used to have these shoebox-sized tan boxes called Alspas that had the ubiquitous Z80A at 4MHz and 64K or ram that was so popular at the time.
Late late 70's to early 80's, I think.

They came bundled w/ CBASIC and WordStar 3.3 (why I use and love Joe/jstar
to this day). Did not have Supercalc or any spreadsheets.

The boss ran his small business on a handful of these things and I wrote
some of the housekeeping software for billing, lable printing and reports.

Ah, those were the days.....

pH in Aptos,CA
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From Newsgroup: comp.os.cpm

I haven't implemented the graphical capabilities yet. I'm currently
working on the hard disk emulation through the Western Digital HD
controller. I didn't recall there being many graphics programs for the Kaypro, but now that you have mentioned one, I'll check it out and see
if I can get graphics working after hard disks.



On 2/14/26 10:47 PM, pH wrote:

On 2026-02-14, ECNeilson <eric@neilsonhart.com> wrote:

On 2/9/26 1:47 PM, John wrote:

I have 2 Kaypros, and definitely appreciate the work!
Thanks,
-J

If you like Kaypros, I have something very cool to share :)

I just finished a project that extends a Kaypro II emulator written by a
fellow named Ivan Izag to support Kaypro 4/84, 4-84, TurboROM-84 and
KayPLUS 84 Kaypro machines. I also added SIO serial port and RTC support
for the 4 models. It's written in Rust and currently runs on MacOS and
Linux - Unfortunately, the cross-OS terminal package (crate) that would
also support Windows runs very slowly, so no Windows support at this
time. You can check it out here:
https://github.com/eneilson-zz/izkaypro

ECNeilson

Wow. So if it emulates Kaypro will it run the Rembrandt graphical software that I seem to recall came out for Kaypro near the end? (I might be mistken about that).

We used to have these shoebox-sized tan boxes called Alspas that had the ubiquitous Z80A at 4MHz and 64K or ram that was so popular at the time.
Late late 70's to early 80's, I think.

They came bundled w/ CBASIC and WordStar 3.3 (why I use and love Joe/jstar
to this day). Did not have Supercalc or any spreadsheets.

The boss ran his small business on a handful of these things and I wrote
some of the housekeeping software for billing, lable printing and reports.

Ah, those were the days.....

pH in Aptos,CA

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From Newsgroup: comp.os.cpm

On 2/14/26 18:06, ECNeilson wrote:

I have 2 Kaypros, and definitely appreciate the work!
Thanks,
-J

If you like Kaypros, I have something very cool to share :)

I just finished a project that extends a Kaypro II emulator written by a fellow named Ivan Izag to support Kaypro 4/84, 4-84, TurboROM-84 and
KayPLUS 84 Kaypro machines. I also added SIO serial port and RTC support
for the 4 models.-a It's written in Rust and currently runs on MacOS and Linux - Unfortunately, the cross-OS terminal package (crate) that would
also support Windows runs very slowly, so no Windows support at this
time.-a You can check it out here:
https://github.com/eneilson-zz/izkaypro

This is great!

And who gives a rat's ass about Windows support. ;)

Very nice work.

-Dave
--
Dave McGuire, President/Curator
Large Scale Systems Museum
New Kensington, PA
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From Newsgroup: comp.os.cpm

On 2/18/26 10:59 AM, Dave McGuire wrote:

On 2/14/26 18:06, ECNeilson wrote:

-a This is great!

-a And who gives a rat's ass about Windows support. ;)

So true! I did end up adding a Windows build. The terminal I/O isn't
nearly as fast as the Linux/OSX variants, but I didn't compromise
performance on the Unix side of things.

I also just added Western Digital WD1002-+05 hard disk controller
emulation to get HD support (that was a bear!). You can now run a
Kaypro10 with ./izkaypro --model=kaypro10 . Drives A and B are 5MB hard disks, and drive C is the floppy per the original Kaypro10. It's
running the 2.2u1 BIOS.

Then I went a little bit crazy and decided to make the penultimate
Kaypro! The new machine is a Kaypro 4-84 running the TurboROM 3.4 BIOS
plus HD support -and you get the RTC and serial port to boot! Just run ./izkaypro --model=turbo_rom_hd .

With the TurboROM BIOS, drives A and B are 5MB HD partitions and you get
two floppy drives, drives C and D, just like you would have if you
attached an HD to your original 4-84.

This should keep the Kaypro people quite happy, all 50 of us.

ECNeilson




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From Newsgroup: comp.os.cpm

On 2/25/26 11:22 PM, ECNeilson wrote:

On 2/18/26 10:59 AM, Dave McGuire wrote:

This should keep the Kaypro people quite happy, all 50 of us.

ECNeilson

I'm happy to be one of the 50!
Have a Kaypro II and a 10 with TurboROM, and a CoPower 88.
-J
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