Difference between revisions of "FAQ"

From coreboot
Jump to navigation Jump to search
m (mere postcard reorder)
Line 139: Line 139:
* http://www.uxd.com/trio.html
* http://www.uxd.com/trio.html
* http://www.soyousa.com/products/proddesc.php?id=261
* http://www.soyousa.com/products/proddesc.php?id=261
=== What is this POST card thing? ===
A POST card will save your life: it's the only output device (beside beeper) you have during the boot process. The term POST means Power On Self Test and comes from the original IBM specifications for the BIOS. Port 80 is a pre-defined port to which programs can output a byte. The POST card displays the byte in hex on its 2 digit display. We use a lot of POST codes in LinuxBIOS, so if you can tell us the POST code you see, we will have some idea of what happened.
If your LinuxBIOS machine is working properly, you will see it count up from 0xd0 to 0xd9 (while it is gunzipping the kernel) and then display 0x98 (Linux idle loop). There are POST cards with ISA bus, PCI bus, USB und parallel port connectors (the latter for laptops).
PCI POST cards can be found in various places.
[http://www.linuxbios.org/index.php/FAQ#Developer POST Cards]


==== Compact Flash IDE adaptor ====
==== Compact Flash IDE adaptor ====
Line 202: Line 214:


The reason is the complexity of the problem. We support a lot of hardware, and a given chip on a given board will most likely not be configured quite the same as the same chip on some other board. To help make code navigation easier, pick a target and build that target. Then, in the build directory, type make tags or make etags to get your favorite tags file.  
The reason is the complexity of the problem. We support a lot of hardware, and a given chip on a given board will most likely not be configured quite the same as the same chip on some other board. To help make code navigation easier, pick a target and build that target. Then, in the build directory, type make tags or make etags to get your favorite tags file.  
=== What is this POST card thing? ===
A POST card will save your life: it's the only output device (beside beeper) you have during the boot process. The term POST means Power On Self Test and comes from the original IBM specifications for the BIOS. Port 80 is a pre-defined port to which programs can output a byte. The POST card displays the byte in hex on its 2 digit display. We use a lot of POST codes in LinuxBIOS, so if you can tell us the POST code you see, we will have some idea of what happened.
If your LinuxBIOS machine is working properly, you will see it count up from 0xd0 to 0xd9 (while it is gunzipping the kernel) and then display 0x98 (Linux idle loop). There are POST cards with ISA bus, PCI bus, USB und parallel port connectors (the latter for laptops).
PCI POST cards can be found in various places.
[http://www.linuxbios.org/index.php/FAQ#Developer POST Cards]


=== How do I contribute my changes? ===
=== How do I contribute my changes? ===

Revision as of 23:02, 6 March 2007