5 Aug
2005
5 Aug
'05
8:42 p.m.
All:
Word to the wise -- always check the cabling. I've been wracking
my brain this week on the serial port problems with my Altair. I wired
the serial board cable per the manual but I never checked if it was NULL
or not. Well, when I put a null adapter on the cable, it worked! Whoo,
hoo.
So with the board configured as an Altair Revision 1 SIO board
(ports 0/1), I toggled in the standard tape loader set for 8k BASIC. I
used Terra Term Pro to send the file at 1200 baud. I saw the data echoed
to the screen but no joy. I never get the "MEMORY SIZE?" prompt, even
after fiddling with the sense switches.
I hate to be a pest, but is there something I'm missing?
Rich
Rich Cini
Collector of classic computers
Build Master for the Altair32 Emulation Project
Web site: http://highgate.comm.sfu.ca/~rcini/classiccmp/
/************************************************************/
6 Aug
6 Aug
1:17 p.m.
All:
Word to the wise -- always check the cabling. I've been wracking
my brain this week on the serial port problems with my Altair. I wired
the serial board cable per the manual but I never checked if it was NULL
or not. Well, when I put a null adapter on the cable, it worked! Whoo,
hoo.
I don't want to say how many times I've made that sort of mistake :-)
Another word to the wise... Get one of those little in-line RS232
testers. The one I have has 7 bi-colour LEDs on it that monitor TxD, RxD,
RTS, CTS, DSR, DTR and CD. I've seen one with more LEDs too.
I'm always using mine to cheack whether an RS232 port is wired as a DTE
or DCE. Or if it drives any of the handshake lines. I find it a lot more
use than my fancier breakout boxes, comms analysers, etc.
-tony
7:13 p.m.
This is so true. I have one of those boxes on this particular system and
it at least tells me what's going on with the lines.
At this point I'm at a loss as to what's wrong. I believe that the card
works based on the loopback program. It's got to be a problem with the
loader and how the paper tape image is coming over the line from the
terminal (a laptop).
I really need someone with a known-working configuration that uses an
SSM card to let me know how it's configured. Otherwise, I'm going to
have to setup a trade for a real Altair SIO card.
Rich
-----Original Message-----
From: cctalk-bounces at classiccmp.org
[mailto:cctalk-bounces at classiccmp.org] On Behalf Of Tony Duell
Sent: Saturday, August 06, 2005 4:17 PM
To: cctalk at classiccmp.org
Subject: Re: Altair serial port update
All:
Word to the wise -- always check the cabling. I've been wracking
my
brain this week on the serial port problems with my
Altair. I wired
the serial board cable per the manual but I never checked if it was
NULL or not. Well, when I put a null adapter on the cable, it worked!
Whoo, hoo.
I don't want to say how many times I've made that sort of mistake :-)
Another word to the wise... Get one of those little in-line RS232
testers. The one I have has 7 bi-colour LEDs on it that monitor TxD,
RxD,
RTS, CTS, DSR, DTR and CD. I've seen one with more LEDs too.
I'm always using mine to cheack whether an RS232 port is wired as a DTE
or DCE. Or if it drives any of the handshake lines. I find it a lot more
use than my fancier breakout boxes, comms analysers, etc.
-tony
9 Aug
9 Aug
11:17 p.m.
OK. I have a question about how this list works. This message just came
through today. I could swear that I saw replies to this email two days ago.
There seem to be 3 or 4 people who get these emails immediately and reply to
them and I don't see the originals until much later when I get 65 emails at
once from this list. The last part I understand, I think, the list is
moderated, and the moderator can't do this all day every day. I also see
that the few guys that seem to respond early are very knowledgeable and
probably deserve some special access, if that's what's going on. What am I
missing?
BTW - the message in this email is something I always tell my networking
classes - I have learned several times the lesson to always check the
physical layer first. Now if I could just remember it ...
Gil
-----Original Message-----
From: cctech-bounces at classiccmp.org
[mailto:cctech-bounces at classiccmp.org] On Behalf Of Richard A. Cini
Sent: Friday, August 05, 2005 10:42 PM
To: 'CCTalk'
Subject: Altair serial port update
All:
Word to the wise -- always check the cabling.
...
16 Aug
16 Aug
3:28 p.m.
OK. I have a question about how this list works. This message just came
through today. I could swear that I saw replies to this email two days ago.
I've just had a burst of what seem to be old messages too.
There seem to be 3 or 4 people who get these emails
immediately and reply to
them and I don't see the originals until much later when I get 65 emails at
once from this list. The last part I understand, I think, the list is
moderated, and the moderator can't do this all day every day. I also see
Well, I'm subscribed to the cctalk list, which I thought was unmoderated.
So that can't be the whole story.
-tony
6849
days inactive
6859
days old
4 comments
3 participants
participants (3)
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