9 Feb
2001
9 Feb
'01
2:25 a.m.
I was recently rummaging through a MicroVAX II GPX, and found the card cage,
as well as the convenient HD trays. I proceeded, out of curiosity, to remove
the RZ55 and what seemed like a SCSI card as well as some other card mounted
above the aforementioned card, connected to the tape drive. After a while, I
decided to plug it all in again, but the VAX didn't seem to agree with my
engineering principles. When I had chosen language, I reached the PROM prompt.
It seemed to take a long time at the "6..." before the prompt, though.
I know nothing about the VAX prompt, but I know that "b" or "boot" has
caused
it to boot before, so I did thus:
>b
2...
?4F SCBINT, XQA0
?06 HLT INST
PC=00000EE6
Fel.
What could have caused this? Have I inserted the QBUS card incorrectly? Or
does the SCSI (Is it SCSI at all?) cable have t0o be inserted in any
particular way into the drive?
This is rather alarming, I don't wish to have inadvertently destroyed a fine
VAX. =/
--
En ligne avec Thor 2.6.
Vi m?ste vara r?dda om varandra - det ?r v?rt enda reciproka pronomen.
9 Feb
9 Feb
3 a.m.
Common mistakes are :
1) leaving a gap in the bus grant chain
2) plugging in a card backwards (components on wrong side)
3) plugging a qbus card into a C/D slot (the first
four slots on the BA123, first 3 on the BA23)
--Chuck
At 05:25 PM 2/9/01 +0100, you wrote:
I was recently rummaging through a MicroVAX II GPX, and
found the card cage,
as well as the convenient HD trays. I proceeded, out of curiosity, to remove
the RZ55 and what seemed like a SCSI card as well as some other card mounted
above the aforementioned card, connected to the tape drive. After a while, I
decided to plug it all in again, but the VAX didn't seem to agree with my
engineering principles. When I had chosen language, I reached the PROM prompt.
It seemed to take a long time at the "6..." before the prompt, though.
I know nothing about the VAX prompt, but I know that "b" or "boot" has
caused
it to boot before, so I did thus:
>b
2...
?4F SCBINT, XQA0
?06 HLT INST
PC=00000EE6
Fel.
What could have caused this? Have I inserted the QBUS card incorrectly? Or
does the SCSI (Is it SCSI at all?) cable have t0o be inserted in any
particular way into the drive?
This is rather alarming, I don't wish to have inadvertently destroyed a fine
VAX. =/
--
En ligne avec Thor 2.6.
Vi m?ste vara r?dda om varandra - det ?r v?rt enda reciproka pronomen. 
7:18 a.m.
New subject: OT? PS2<->USB
Possibly on topic due to the year of introduction
of the PS2 serial mouse connection... I recently
picked up a new , fairly low cost mouse (Logitech
optical) without expecting anything but the PS2
connector and lo and behold the thing was native
USB... with a miniscule PS2 adaptor on the end.
My Q is this: is USB somehow an electrical superset
of PS2, IE the adaptor was passive. Or, did they fit
some electronics in that tiny thing?
John A.
8:08 a.m.
New subject: OT? PS2<->USB
On Fri, 9 Feb 2001, John Allain wrote:
is USB somehow an electrical superset of PS2
No.
Or, did they fit some electronics in that tiny thing?
I would guess that the microcontroller in the mouse can handle both PS2
and USB protocols and has some way of automatically detecting which type
of interface it's connected to.
--
------- Alex Holden -------
http://www.linuxhacker.org/
http://www.robogeeks.org/
8:29 a.m.
New subject: OT? PS2<->USB
Possibly on topic due to the year of introduction
of the PS2 serial mouse connection... I recently
picked up a new , fairly low cost mouse (Logitech
optical) without expecting anything but the PS2
connector and lo and behold the thing was native
USB... with a miniscule PS2 adaptor on the end.
My Q is this: is USB somehow an electrical superset
of PS2, IE the adaptor was passive. Or, did they fit
some electronics in that tiny thing?
John A.
The smarts are in the mouse. I have a couple devices like this, and they
must have some smarts inside that detects the type of connection, and
behaves correctly. Pretty common in a bunch of cheap devices really.
One caution, mark the doodad, as they may not be the same for different
devices.
8:59 a.m.
New subject: OT? PS2<->USB
There are many dozens of USB-dedicated microcontrollers by now. Intel has a
bunch, Cypress has a bunch ... Siemens has a bunch ... Philips has a bunch
... I could go on ...
These devices swap larger intelligence, bought at the price of silicon
(about $3/lbincluding packaging, etc.), for interconnection uniformity.
There's enough intelligence at the computer end to figure out what it is and
how to talk to it, and there's enough intelligence at the device end to
communicate in a regular way so that the system to which it's attached will
be able to figure out who/what it is. This is what they're giving us in
place of those expansion slots that newer PC's haven't got anymore.
Dick
----- Original Message -----
From: "Mike Ford" <mikeford(a)socal.rr.com>
To: <classiccmp(a)classiccmp.org>
Sent: Friday, February 09, 2001 3:29 PM
Subject: Re: OT? PS2<->USB
Possibly on
topic due to the year of introduction
of the PS2 serial mouse connection... I recently
picked up a new , fairly low cost mouse (Logitech
optical) without expecting anything but the PS2
connector and lo and behold the thing was native
USB... with a miniscule PS2 adaptor on the end.
My Q is this: is USB somehow an electrical superset
of PS2, IE the adaptor was passive. Or, did they fit
some electronics in that tiny thing?
John A.
The smarts are in the mouse. I have a couple devices like this, and they
must have some smarts inside that detects the type of connection, and
behaves correctly. Pretty common in a bunch of cheap devices really.
One caution, mark the doodad, as they may not be the same for different
devices.
4:08 a.m.
On 9 Feb 2001, Iggy Drougge wrote:
I'm pretty sure that the XQA0 means that it's trying to boot from the
network. Try a "b DUA0" and see what happens.
-- Brian
--
Brian Harrington
Digital Knowledge Center
The Johns Hopkins University
brian(a)sigh.mse.jhu.edu
>b
2...
?4F SCBINT, XQA0
?06 HLT INST
PC=00000EE6
10:30 a.m.
brian skrev:
On 9 Feb 2001, Iggy Drougge wrote:
> >>b
> 2...
> ?4F SCBINT, XQA0
> ?06 HLT INST
> PC=00000EE6
I'm pretty sure that the XQA0 means that it's
trying to boot from the
network. Try a "b DUA0" and see what happens.
Thanks, are there any good VAX references on the WWW? All manuals I've been
able to find are ULTRIX manuals, no hardware references.
--
En ligne avec Thor 2.6.
G? med i SUGA, Swedish Usergroup of Amiga!
WWW: http://swedish.usergroup.amiga.tm/
BBS: 08-6582572, telnet sua.ath.cx, port 42512.
8717
days inactive
8717
days old
7 comments
7 participants
participants (7)
-
alex＠linuxhacker.org -
brian＠sigh.mse.jhu.edu -
cmcmanis＠mcmanis.com -
edick＠idcomm.com -
John.Allain＠Donnelley.InfoUSA.Com -
mikeford＠socal.rr.com -
optimus＠canit.se