On 7/11/19 10:02 AM, Kurt McCullum wrote:
Nice 3D printed option rom carrier too!
Thanks. Still dialing it in, but so far so good.
I just got an earlier version of the carrier in yesterday, and from that
I can at least say:
* the pcb fits in the carrier
* together the carrier and pcb fit i
While looking for other possible uses for the 3d-printed modified molex
carrier and matching pcb, I discovered the Epson PX-8, which has a z80
and runs cp/m, so, I would guess that means there is even already at
least some sort of body of code to use cp/m on a device like this. I
guess that doe
I'm interested. I have a M100 I'd like to see
CP/M run on. Smack me up!
Sent from my iPhone
> On Jul 11, 2019, at 10:30 AM, Stephen Adolph wrote:
>
> Motivated by 2 things
> 1) discovery of the NSC800 Z80 processor that is 80C85 like
> 2) continuing to work in the direcition of CP/M
> 3) and r
On Thu, Jul 11, 2019 at 1:17 PM Ken Pettit wrote:
>
> Yes, it is bit sampled. Also system time would run too fast and your
> modem would run at a higher baud rate.
I thought the UART chip handled the baud rate, not the CPU clocking things.
-Josh
much of this can be addressed with a rom patch ,I believe.
On Thu, Jul 11, 2019 at 1:30 PM John R. Hogerhuis wrote:
> Ah I missed the obvious things. I was thinking that the time and baud rate
> were based on hardware not software timing. But I guess they all would be
> changed by the higher cl
Ah I missed the obvious things. I was thinking that the time and baud rate
were based on hardware not software timing. But I guess they all would be
changed by the higher clock.
-- John.
Yes, it is bit sampled. Also system time would run too fast and your
modem would run at a higher baud rate.
Ken
On 7/11/19 10:12 AM, John R. Hogerhuis wrote:
Very cool Steve. I'm interested but I don't know if I can manage the
install.
I'd think the software timing things that will break i
Very cool Steve. I'm interested but I don't know if I can manage the
install.
I'd think the software timing things that will break in the ROM would be
cassette I/O, key repeat, sound, I guess. Is the BCR bit sampled?
-- John.
Wow!
On Thu, Jul 11, 2019, 10:30 AM Stephen Adolph wrote:
> thanks Tom; I'd be happy to get you one of these + the REXCPM 4MB module
> that ties it all together for CP/M
>
> Did I mention REXCPM is now based on 4MB SRAM? that's a lot of disk
> space!!!
>
>
> On Thu, Jul 11, 2019 at 11:16 AM Tom
On Thu, Jul 11, 2019 at 11:30 AM Stephen Adolph wrote:
>
> thanks Tom; I'd be happy to get you one of these + the REXCPM 4MB module that
> ties it all together for CP/M
>
> Did I mention REXCPM is now based on 4MB SRAM? that's a lot of disk space!!!
Wow!
thanks Tom; I'd be happy to get you one of these + the REXCPM 4MB module
that ties it all together for CP/M
Did I mention REXCPM is now based on 4MB SRAM? that's a lot of disk
space!!!
On Thu, Jul 11, 2019 at 11:16 AM Tom Dison wrote:
> I'm interested, especially as I have a M100 and several
Josh,
I'll know soon enough about height clearances. Will take lots of pictures.
I think there is room however in the M100. A socket on the M100 board is a
mandatory so you can revert to normal operation.
So, worst case is that the card itself has no sockets, but has the 2 CPUs
soldered in place.
I'm interested, especially as I have a M100 and several CP/M laptops.
On Thu, Jul 11, 2019, 10:14 AM Josh Malone wrote:
> On Thu, Jul 11, 2019 at 10:31 AM Stephen Adolph
> wrote:
>
> > Board is done and heading to the fab. VHDL is mostly done.
> >
> > I don't expect this board will be wildly p
On Thu, Jul 11, 2019 at 10:31 AM Stephen Adolph wrote:
> Board is done and heading to the fab. VHDL is mostly done.
>
> I don't expect this board will be wildly popular but maybe it has some
> interest Double speed M100 seems interesting on it's own, let alone being
> able to support Z80 CP/M
yah good point. not really sure about all the impacts of 5MHz. I'm
guessing it will need some patches in certain things. The capability is a
soft switch meaning you can just type a simple OUT command and switch on
the fly to fast mode.
So, perhaps that's the work around.
Might really mess up sys
Steve,
Not owning a 100 I can't dive into this but I am definitely watching to see
what you come up with. The 5mhz upgrade is really interesting. I do wonder what
that will do to all the apps that have specific timing (ie: TS-DOS delay). Will
the clock get messed up?
But if this leads to CP/M
Motivated by 2 things
1) discovery of the NSC800 Z80 processor that is 80C85 like
2) continuing to work in the direcition of CP/M
3) and recalling that there are 5MHz 80C85 parts out there..
I started to work on a dual CPU card for M100 that enables a couple of
things;
- standard 2.5MHz 80C85 oper
Nice 3D printed option rom carrier too!
On Wed, Jul 10, 2019, at 11:28 PM, Brian K. White wrote:
> I finally did the version of this that I had envisioned.
> https://oshpark.com/shared_projects/Sk27mJwq
>
> The idea here is you just buy a cheap modem cable for $2 and cut off the
> 9-pin. No dupo
Nice work Brian. Using a pre-molded cable should help with fitting into the
M100 slot.
Kurt
On Wed, Jul 10, 2019, at 11:28 PM, Brian K. White wrote:
> I finally did the version of this that I had envisioned.
> https://oshpark.com/shared_projects/Sk27mJwq
>
> The idea here is you just buy a chea
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