| Maximum RS232 speed from a CBM 128 in CP/M mode? Terminal software? [message #210311] |
Sun, 22 September 2013 09:12  |
sampsa
Messages: 24
Registered: August 2012
Karma: 0
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Guys,
I have a couple of CBM128's and would love to run one of the as a front-end / terminal to a VAX I have.
Some questions:
- What's the maximum bps rate I can get out of the (I assume userport - RS232 adapter)?
- Where can I acquire one of these adapters?
- Anyone know of terminal software that'll run on CP/M on a C128?
sampsa
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| Re: Maximum RS232 speed from a CBM 128 in CP/M mode? Terminal software? [message #210313 is a reply to message #210311] |
Sun, 22 September 2013 11:59  |
Payton Byrd
Messages: 1198
Registered: December 2011
Karma: 0
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Senior Member |
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On Sunday, September 22, 2013 8:12:38 AM UTC-5, sam...@gmail.com wrote:
> Guys,
>
>
>
> I have a couple of CBM128's and would love to run one of the as a front-end / terminal to a VAX I have.
>
>
>
> Some questions:
>
>
>
> - What's the maximum bps rate I can get out of the (I assume userport - RS232 adapter)?
>
> - Where can I acquire one of these adapters?
>
> - Anyone know of terminal software that'll run on CP/M on a C128?
>
>
>
> sampsa
Kermit for the C128's CPM is about the best term you're going to find.
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| Re: Maximum RS232 speed from a CBM 128 in CP/M mode? Terminal software? [message #210361 is a reply to message #210360] |
Tue, 22 October 2013 13:38 |
rusure
Messages: 1030
Registered: March 2012
Karma: 0
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Senior Member |
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On Tuesday, October 22, 2013 12:08:10 AM UTC-6, Computer Nerd Kev wrote:
> On 22 Sep 2013, wrote:
> The official Commodore adapter was the VIC-1011A with a DB-25
> RS232 output:
I wonder if the 1011A was completely mechanically compatible with a 128.
In C128 RGB video mode, I could only use the adapter when its outer
case was removed. When a complete 1011A was in use, I was unable
to attach an RGB cable and the adapter at the same rime. I wonder
if running the 1011 without it's case was harmful to the adapter.
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| Re: Maximum RS232 speed from a CBM 128 in CP/M mode? Terminal software? [message #210364 is a reply to message #210361] |
Wed, 23 October 2013 05:20 |
Computer Nerd Kev
Messages: 79
Registered: February 2012
Karma: 0
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Member |
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On 23 Oct 2013, rusure wrote:
> I wonder if the 1011A was completely mechanically
> compatible with a 128.
I don't have a C128, but I think the 1011A was a product of
the Vic-20 or C64 era (the colour certainly was), so I guess
it wouldn't be surprising that the design didn't work
perfectly with a 128.
> I wonder if
> running the 1011 without it's case was harmful to the
> adapter.
As we're not talking about super high frequency electronics
(MHz range, with all its shielding), I don't believe the case
would make a bit of difference to the circuit. The only harm
could be caused if you dropped a paperclip or something on the
PCB and were unlucky enough to have it short positive to
ground; though with old RS232 cables/adapters, you'd probably
still be in more risk of doing that with a cabling mistake.
Of course you'd want to make sure there wasn't too much strain
on the DB-25 connector, with it all being taken by the PCB.
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