8 Mar
2005
8 Mar
'05
9:21 a.m.
Hi,
Has anyone successfully built one of the PS/2 -> Indigo adapters off of
the following page?
http://rshockley.dyndns.org/indigo.htm
I'm having a devil of a time getting the mouse portion of things to
work.
When I hook my scope up to the clock and/or data PS/2 lines, I see no
data being received from the mouse.
I'm wondering if the mouse init code is not liking any of the PS/2 mice
I've got around. (I've tried 4 different ones.)
If you've got one working, what sort of mouse do you have?
I freely admit, I'm not a PIC expert, as this is my first project w/
them. :-> So any clue's anyone cares to beat me about the head and
shoulders w/ will be appreciated.
I do know the PIC's are "running", as the dozen test program I wrote
toggles the pins on PortA, and the keyboard side of things appears to be
working. I'm also pretty certain that my config word is right,
particularly external oscillator, and watchdog timer is off.
Anyone got one working? Or do I get to experience the joy's of reverse
engineering the code?
Thanks,
David
8 Mar
8 Mar
10:38 a.m.
Why bother? The origianl SGI stuff is going for almost nothing on E-bay.
Joe
At 09:21 AM 3/8/05 -0500, you wrote:
Hi,
Has anyone successfully built one of the PS/2 -> Indigo adapters off of
the following page?
http://rshockley.dyndns.org/indigo.htm
I'm having a devil of a time getting the mouse portion of things to
work.
When I hook my scope up to the clock and/or data PS/2 lines, I see no
data being received from the mouse.
I'm wondering if the mouse init code is not liking any of the PS/2 mice
I've got around. (I've tried 4 different ones.)
If you've got one working, what sort of mouse do you have?
I freely admit, I'm not a PIC expert, as this is my first project w/
them. :-> So any clue's anyone cares to beat me about the head and
shoulders w/ will be appreciated.
I do know the PIC's are "running", as the dozen test program I wrote
toggles the pins on PortA, and the keyboard side of things appears to be
working. I'm also pretty certain that my config word is right,
particularly external oscillator, and watchdog timer is off.
Anyone got one working? Or do I get to experience the joy's of reverse
engineering the code?
Thanks,
David
10:51 a.m.
Joe has obviously never attempted to find an Indigo keyboard on eBay! :P
I ended up buying one of these convertors because the keyboards either
don't come up, or they go for some $60 :P
On Tue, 8 Mar 2005, Joe R. wrote:
Why bother? The origianl SGI stuff is going for
almost nothing on E-bay.
Joe
At 09:21 AM 3/8/05 -0500, you wrote:
Hi,
Has anyone successfully built one of the PS/2 -> Indigo adapters off of
the following page?
http://rshockley.dyndns.org/indigo.htm
I'm having a devil of a time getting the mouse portion of things to
work.
When I hook my scope up to the clock and/or data PS/2 lines, I see no
data being received from the mouse.
I'm wondering if the mouse init code is not liking any of the PS/2 mice
I've got around. (I've tried 4 different ones.)
If you've got one working, what sort of mouse do you have?
I freely admit, I'm not a PIC expert, as this is my first project w/
them. :-> So any clue's anyone cares to beat me about the head and
shoulders w/ will be appreciated.
I do know the PIC's are "running", as the dozen test program I wrote
toggles the pins on PortA, and the keyboard side of things appears to be
working. I'm also pretty certain that my config word is right,
particularly external oscillator, and watchdog timer is off.
Anyone got one working? Or do I get to experience the joy's of reverse
engineering the code?
Thanks,
David
11:30 a.m.
On Tue, 08 Mar 2005 10:38:50 -0500, Joe R. <rigdonj at cfl.rr.com> wrote:
Why bother? The origianl SGI stuff is going for
almost nothing on E-bay.
Even if they are, I can think of one reason - sticking SGI equipment
off of a KVM.
-ethan
P.S. - sorry I can't help with the original question. I don't have
any SGI gear and haven't tried making my own adapter.
12:45 p.m.
On Tue, 2005-03-08 at 11:30 -0500, Ethan Dicks wrote:
Even if they are, I can think of one reason - sticking SGI equipment
off of a KVM.
Cybex, now Avocent, used to have a "workstation" card you could put into
one of their slot-based KVMs like the Autoboot Commander 4XP. With the
right cables it would connect a DEC, Sun, SGI, <whatever> workstation
into the KVM. These are an older line of products, but they are widely
deployed in large datacenters, so these cable sets might still be
available new from Avocent. I used one of these with three PC cards in
the four slot Commander 1XP I bought in the mid-90s.
The cables won't be cheap, but they'd do what you need. OTOH I've seen a
fair bit of Cybex/Avocent stuff fly by on eBay over the years.
Side note, doesn't help with SGIs, but the newer line of Cybex Autoview
KVMs will take a Sun keyboard/mouse for input. This lets me use a Type
5c on my commodity PC desktops - actually, I use it with a PS/2 mouse.
I'm using the Autoview 400 model, if anyone's curious.
FYI,
--Steve.
1:37 p.m.
One reason: Learning experience.
I can now say I've dinked w/ Eagle, designed, and etched my own PCB
boards, played around w/ PIC's, and I've now got a PIC programmer should
I feel the urge to play w/ them again.
I've also got a deskside Crimson, I should theoretically be able to use
the adapter with. (With the appropriate cable adapter of course.)
I suppose I could of wired up an adapter for my Crimson keyboard to work
w/ the Indigo, but then I'd still not have the challenge of building the
things myself.
(That and the Crimson's mouse is a optical jobby that's in pretty rough
shape, barely usable, and in dire need of replacement.)
David
On Tue, 2005-03-08 at 10:38 -0500, Joe R. wrote:
Why bother? The origianl SGI stuff is going for
almost nothing on E-bay.
Joe
At 09:21 AM 3/8/05 -0500, you wrote:
>Hi,
>
>Has anyone successfully built one of the PS/2 -> Indigo adapters off of
>the following page?
>
>http://rshockley.dyndns.org/indigo.htm
>
>
>I'm having a devil of a time getting the mouse portion of things to
>work.
>
>When I hook my scope up to the clock and/or data PS/2 lines, I see no
>data being received from the mouse.
>
>I'm wondering if the mouse init code is not liking any of the PS/2 mice
>I've got around. (I've tried 4 different ones.)
>
>If you've got one working, what sort of mouse do you have?
>
>I freely admit, I'm not a PIC expert, as this is my first project w/
>them. :-> So any clue's anyone cares to beat me about the head and
>shoulders w/ will be appreciated.
>
>I do know the PIC's are "running", as the dozen test program I wrote
>toggles the pins on PortA, and the keyboard side of things appears to be
>working. I'm also pretty certain that my config word is right,
>particularly external oscillator, and watchdog timer is off.
>
>Anyone got one working? Or do I get to experience the joy's of reverse
>engineering the code?
>
>Thanks,
>
>David
>
>
>
10:41 a.m.
On Tue, 2005-03-08 at 09:21 -0500, David Holland wrote:
Hi,
Has anyone successfully built one of the PS/2 -> Indigo adapters off of
the following page?
No, but I've seen that page before - lack of a PIC programmer has
stopped me building one (or two). We've got a 4D/25 and two Indigos, but
only one SGI keyboard between the three...
When I hook my scope up to the clock and/or data PS/2
lines, I see no
data being received from the mouse.
Obvious one: have you checked that the mouse is getting power?
I don't actually know whether the PIC is supposed to generate the mouse
clock or whether the mouse does though... if the former then you'd
presumably see something on the clock line if the PIC was running.
Looking at the schematic, how the heck do PICs reset at power-on?
Presumably it's internal - I'm suprised reset isn't under user control
on one of the pins though...
cheers
Jules
1:55 p.m.
On Tue, 2005-03-08 at 15:41 +0000, Jules Richardson wrote:
Yup. Mouse is getting power. One of the first things I verified.
On Tue, 2005-03-08 at 09:21 -0500, David Holland
wrote:
I built this thing:
http://www.bobblick.com/techref/projects/picprog/picprog.html
Component cost is pretty low, and the propic2 software off that page
(while Windows based) programs the 16F628's well enough.
(Verify doesn't work however. - Just read the device, and eyeball it.)
Hi,
Has anyone successfully built one of the PS/2 -> Indigo adapters off of
the following page?
No, but I've seen that page before - lack of a PIC programmer has
stopped me building one (or two). We've got a 4D/25 and two Indigos, but
only one SGI keyboard between the three... When I hook my scope up to the clock and/or data
PS/2 lines, I see no
data being received from the mouse.
Obvious one: have you checked that the mouse is getting power?
I don't actually know whether the PIC is supposed to generate the mouse
clock or whether the mouse does though... if the former then you'd
presumably see something on the clock line if the PIC was running.
According to the data I found on the PS/2 spec, it depends. If the
mouse is talking, it twiddles the clock line. If the "host" is talking,
it twiddles the clock line.
I _think_ I see a little initialization data pass down the line, to the
mouse, when I first power up the device, but my o'scope isn't a memory
type, so it might just be power up noise.
Hence my suspicion that it might be a initialization issue.
Looking at the schematic, how the heck do PICs reset at power-on?
Internal reset @ power-on circuitry.
You also need to tie ~MCLR to VDD via a resistor.
(Which is an error in the schematic. - And my PIC's wouldn't "run" till
I did so.)
I used a couple of 4.7K, as it was what I had lying around.
Presumably it's internal - I'm suprised reset
isn't under user control
on one of the pins though...
If I understand the datasheet, its a function of ~MCLR, and the config
bits, and if you were to drop it to ground, it'd reset the device.
cheers
Jules
7072
days inactive
7072
days old
7 comments
6 participants
participants (6)
-
classiccmp＠crash.com -
dholland＠woh.rr.com -
ethan.dicks＠gmail.com -
jplist＠kiwigeek.com -
julesrichardsonuk＠yahoo.co.uk -
rigdonj＠cfl.rr.com