Hello from Gregg C Levine A POST card? How to explain simply... A POST card, was created, (Or designed), to display the activities of the computer, through Port 80, while it works from power on, the final prompt. The term POST means, Power On Self Test. It descends from the original IBM-PC world. They are very useful, in this world, because we are creating the next generation BIOS from the ground, or bare metal, up. There are a preset sequence of events, numbered 00 to FF to go through. Each of them, properly documented, can tell a designer why his new system isn't working. And then there are a specific series of POST codes that can be useful to designers, when running supplied diagnostics.
At least that was the case, about ten years ago. It's been that long since I did that kind of work. The repairing of such systems, that is.
Okay, Ron, Richard, how did I do? ------------------- Gregg C Levine hansolofalcon@worldnet.att.net ------------------------------------------------------------ "The Force will be with you...Always." Obi-Wan Kenobi "Use the Force, Luke." Obi-Wan Kenobi (This company dedicates this E-Mail to General Obi-Wan Kenobi ) (This company dedicates this E-Mail to Master Yoda )
-----Original Message----- From: linuxbios-admin@clustermatic.org [mailto:linuxbios- admin@clustermatic.org] On Behalf Of Frank Sent: Thursday, May 15, 2003 1:55 PM To: jarcher; linuxbios@clustermatic.org Subject: Re:debugger
I don't mind getting dirty. as a matter of fact i prefer to work in the dirt. That's why I'm looking at linuxbios.:-) I come from a ppc and mips world where debuuger's are a lot more plentiful and cheaper. What is a "POST card"... --- jarcher jarcher@pobox.com wrote:
To add to Ron's message.
It varies a lot with your experience and how dirty you want to get.
A simple POST card and a lot of creative POST code bread crumbs is the cheap and dirty way to go, until you get the serial port debugger up and running. But it requires you to be really creative in crawling through the code. And takes a lot of time.
But you can move up the a logic analyzer looking at bus cycles or an ICE (in circuit emulator) looking at CPU activity These two are expensive (lots of $10K), but you can often rent them. Setup is usually the time burner here. But with a LA you can take selective pictures of events chained together in time. I don't know if SIS has an ICE for their SOC products.
Jordan
PS: Has anyone done a USB interface low level debugger? Early BIOS or at least just prior to payload decompress.
At 12:00 PM 5/15/2003 -0400, you wrote:
Message: 10 Date: Thu, 15 May 2003 08:50:44 -0700 (PDT) From: Frank frannk_m1@yahoo.com Subject: Re: debugger To: ron minnich rminnich@lanl.gov Cc: linuxbios@clustermatic.org
sis55x SOC x86 based --- ron minnich rminnich@lanl.gov wrote:
On Thu, 15 May 2003, Frank wrote:
Can anyone recommend a debugger for bringing up
LinuxBios on
an
x86 system...
what kind of chip? and how much money can you spend?
ron
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