23 Feb
1998
23 Feb
'98
2:17 p.m.
They'd be extremely handy as a diagnostic tool,
especially when there's
a
problem with a video card or memory, and instead of
having to count a
bunch of stupid beeps to determine what the error code is, you can just
read it off the front panel.
Those front panels had value that was overlooked when the modern
machines
were ushered in.
I wouldn't say that! Some
of the PS/2s, A popular WYSE 286 machine and
so one have had LCD diagnostic panels
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23 Feb
23 Feb
9:41 a.m.
They'd be extremely handy as a diagnostic
tool, especially when there's
a
problem with a video card or memory, and instead
of having to count a
bunch of stupid beeps to determine what the error code is, you can just
read it off the front panel.
Those front panels had value that was overlooked when the modern
machines
were ushered in.
I wouldn't say that!
Some of the PS/2s, A popular WYSE 286 machine and
so one have had LCD diagnostic panels
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email: jpero(a)cgo.wave.ca
Pero, Jason D.
2:54 p.m.
On Mon, 23 Feb 1998 jpero(a)cgo.wave.ca wrote:
Early high end Dell series (I think!) had this dot
matix that glows
yellow and rare motherboards that had POST display built in.
That reminds me of a product idea. I'm pretty sure I won't get around to
this one, but if you do, mention me in the prospectus :-)
If I'm not mistaken, all modern Pentium CPUs have a secret ICE mode. You
need an NDA from Intel to get the info, but this capability allows things
like in-circuit emulators to get all sorts of good information about the
chip, disable caching, stop the CPU while the clock keeps clocking, etc.
It even gives you access to microcode (which is one reason why Intel
doesn't tell you about it).
All of the smarts are on the chip, so all you need is a relatively simple
debug port on the mobo to get to this stuff. I don't know of anybody that
has actually built this port into a standard PC mobo, but I would buy one
if they did. You could use another PC as the "front-panel", so the
expense burden of such a diagnostic tool would be shifted to those that
needed this capability.
-- Doug
1:13 p.m.
On Mon, 23 Feb 1998 jpero(a)cgo.wave.ca wrote:
I think this have changed recently and you can
search for that info
and one guy who fought intel for long time on the appendiz H issue
and partly won. I could be mistaken on this.
BTW on the floppy drives issues I found the drive I was looking for!
It's Teac model FD-235HF-117-U. Blown IC in question is stepper
driver type and it's labeled Teac, 3479-00B, 86.1 "6" with a line on
top. Is this relabeled IC or teac's custom ic? If anyone have a
worn out or dud teac, dig that out and send on to my way is mucho
appreciated! That floppy drive is also over 10 years old so this
rule fits too. :)
Jason D.
Early high end Dell series (I think!) had this
dot matix that glows
yellow and rare motherboards that had POST display built in.
That reminds me of a product idea. I'm pretty sure I won't get around to
this one, but if you do, mention me in the prospectus :-)
If I'm not mistaken, all modern Pentium CPUs have a secret ICE mode. You
need an NDA from Intel to get the info, but this capability allows things
like in-circuit emulators to get all sorts of good information about the
chip, disable caching, stop the CPU while the clock keeps clocking, etc.
It even gives you access to microcode (which is one reason why Intel
doesn't tell you about it).
All of the smarts are on the chip, so all you need is a relatively simple
debug port on the mobo to get to this stuff. I don't know of anybody that
has actually built this port into a standard PC mobo, but I would buy one
if they did. You could use another PC as the "front-panel", so the
expense burden of such a diagnostic tool would be shifted to those that
needed this capability.
-- Doug
email: jpero(a)cgo.wave.ca
Pero, Jason D.
7:13 p.m.
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