24 Aug
2000
24 Aug
'00
4:14 a.m.
--- Tony Duell <ard(a)p850ug1.demon.co.uk> wrote:
What I/O port? The games port? There was rumoured to
be a bit-banging
routine to output serial data on one of the outputs there. But I never
heard of it being in a PROM.
I don't know where my friend got it, but we rigged up a bit-banging-serial-
port between the joystick port of an Apple II and the User Port of a C-64
to transfer the data portion of an Infocom game from an Apple disk to a
C-64 disk (it all worked once we figured out the sector mapping).
The bit-banging serial port is a pretty simple device.
Single-bit in and
out buffered to RS232 and current loop levels. And a program to shift
data in and out in software.
We didn't even have level shifters - TTL on both sides, but RS-232 _is_
the more typical use.
Believe me, after you've tried to use this card
seriously you (a) wish
for a real serial card with a 6850 or 6551 on it and (b) want to do
unprintable things to the designers...
The C-64 comes with 1200-baud bit-banging in ROM. That's why we did it
that way. UARTS are much nicer (having later aquired a Super Serial Card),
but not all micros had them.
-ethan
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24 Aug
24 Aug
4:51 a.m.
Believe me,
after you've tried to use this card seriously you (a) wish
for a real serial card with a 6850 or 6551 on it and (b) want to do
unprintable things to the designers...
The C-64 comes with 1200-baud bit-banging in ROM. That's why we did it
that way. UARTS are much nicer (having later aquired a Super Serial Card),
but not all micros had them. 
11:45 a.m.
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1:58 p.m.
The C-64 comes
with 1200-baud bit-banging in ROM. That's why we did it
that way. UARTS are much nicer (having later aquired a Super Serial Card),
but not all micros had them.
Yes, but the C64/C128 have an expansion bus. It's not hard to hook up a
6551. In fact it would take me less time to do that (and I have a
suitable chip in the junk box) than it would take me to debug the
bitbanging routines... The P500 has a real serial port (6551, RS232 level
shifters, DB25
connector), but few other CBM machines do :-(
The Plus/4 has a 6551, but it uses the regular weird user port.
--
----------------------------- personal page: http://www.armory.com/~spectre/ --
Cameron Kaiser, Point Loma Nazarene University * ckaiser(a)stockholm.ptloma.edu
-- Proponents of other opinions will be merrily beaten to a bloody pulp. ------
2:27 p.m.
New subject: looking for teletype KSR-43 ribbons
Does anyone have a stash of these?
--
Aaron Nabil
25 Aug
25 Aug
5:15 a.m.
New subject: looking for teletype KSR-43 ribbons
http://www.partsalliance.com/ne/ribbons.htm
A package of 6 Teletype 43/45 ribbons is $16.62, or $20.28 including tax.
Of course, this site is in Austrailia...
http://www.ribbon-exchange.com/ribbons/newrib.htm
This site has them for $7.50 each.
This ribbon is still very common.
-Lawrence LeMay
Does anyone have a stash of these?
--
Aaron Nabil
9:08 a.m.
New subject: looking for teletype KSR-43 ribbons
On Fri, 25 Aug 2000, Lawrence LeMay wrote:
http://www.partsalliance.com/ne/ribbons.htm
A package of 6 Teletype 43/45 ribbons is $16.62, or $20.28 including tax.
Of course, this site is in Austrailia...
Wow! A 22% tax! Shipping not included I presume.
http://www.ribbon-exchange.com/ribbons/newrib.htm
This site has them for $7.50 each.
This ribbon is still very common.
-Lawrence LeMay
Does anyone have a stash of these?
--
Aaron Nabil
26 Aug
26 Aug
11:11 p.m.
New subject: looking for teletype KSR-43 ribbons
----- Original Message -----
From: Don Maslin <donm(a)cts.com>
To: <classiccmp(a)classiccmp.org>
Sent: Saturday, August 26, 2000 6:38 AM
Subject: Re: looking for teletype KSR-43 ribbons
That would be wrong, we went to a retail price based GST of 10% on 1 July
On Fri, 25 Aug 2000, Lawrence LeMay wrote:
>
> http://www.partsalliance.com/ne/ribbons.htm
>
> A package of 6 Teletype 43/45 ribbons is $16.62, or $20.28 including
tax.
Of course,
this site is in Austrailia...
Wow! A 22% tax! Shipping not included I presume. from a wholesale price sales tax of 22%.
It's
likely the site has not been updated yet.
I can get these through a local office machine supplier for around $8 ea
incl tax. They are still quite easy to get.
Cheers
Geoff Roberts
Computer Systems Manager
Saint Mark's College
Port Pirie, South Australia,
geoffrob(a)stmarks.pp.catholic.edu.au
27 Aug
27 Aug
8:21 a.m.
New subject: looking for teletype KSR-43 ribbons
On Sun, 27 Aug 2000, Geoff Roberts wrote:
. . .
I can get these through a local office machine supplier for around $8 ea
incl tax. They are still quite easy to get.
I was hoping someone would have a stash, yes, they are still easy to
order, which I ended up doing.
If you don't mind clones, you can get a Intec (not crap) RI1039E from
http://www.theverylastword.com/ribbons.htm for about $5/ea, or if you
want the genuine article order a AT&T 127815 for about $8/ea from
10kplus.com like I did yesterday.
--
Aaron Nabil
25 Aug
25 Aug
5:15 a.m.
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8883
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9 comments
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-
ard＠p850ug1.demon.co.uk -
donm＠cts.com -
ethan_dicks＠yahoo.com -
geoffrob＠stmarks.pp.catholic.edu.au -
lemay＠cs.umn.edu -
nabil＠SpiritOne.com -
spectre＠stockholm.ptloma.edu