Search found 10 matches

by bc
Mon Sep 13, 2004 4:32 am
Forum: Notebook BIOS and other problems
Topic: Bios Image for AMS TravelPro 185
Replies: 0
Views: 3654

Bios Image for AMS TravelPro 185

Looking for a bios image for this laptop to fix a bad flash that rendered it
useless some time ago. AMS Tech is dead and gone.

Orpah laptops has only this to say about the 185:
http://www.orphanlaptops.com/180.htm
by bc
Sun Aug 01, 2004 3:20 pm
Forum: In-depth High-tech BIOS section
Topic: Hacking Award BIOS to disable onboard video
Replies: 37
Views: 43760

Im using dos debug. I wasnt showing the byte swapped opcode, just the
program listing.
Anyway mov ax,0007 is indeed correct for setting mda mode. ah=0 al=7. Trace a simple program like the following and the registers match.
Sorry if this causes confusion.

B80700 MOV AX,0007
B700 MOV BH,00
B307 MOV ...
by bc
Sat Jul 31, 2004 10:12 pm
Forum: In-depth High-tech BIOS section
Topic: Hacking Award BIOS to disable onboard video
Replies: 37
Views: 43760

CALL FAR C000:0003
MOV AX,0007
INT 10
(now the default card is set to mda mode)
CALL FAR xxxx:0003
MOV AX,0003
INT 10
(pci card/bios is alive in ega)
...

Those last 3 lines are just for experimentation outside the bios, ie in dos.
I suppose nothing really prevents their inclusion. If so, however ...
by bc
Sat Jul 31, 2004 5:05 pm
Forum: In-depth High-tech BIOS section
Topic: Hacking Award BIOS to disable onboard video
Replies: 37
Views: 43760

One trick might be to asap put the onboard vga card into MDA mode,
then initialize the PCI/etc card. If the onboard card does a good job of strictly emulating MDA, coexistence with another vga card should be no problem (port and memory IO wise).

If you can pre-initialize the onboard card into MDA ...
by bc
Mon Jul 26, 2004 6:42 pm
Forum: BIOS Utilities & Flash Programs
Topic: very old Awdflash-Version
Replies: 12
Views: 12116

PCI board but no flash.
AT27C010 is an EPROM.

Time to start digging.
by bc
Mon Jul 26, 2004 5:10 pm
Forum: BIOS Utilities & Flash Programs
Topic: very old Awdflash-Version
Replies: 12
Views: 12116

Could be any one of :
http://drivers.infomaniak.ch/main.php?sDirectory=Drivers/Fic/Utilitaire/

Looks like flash52c is the one of the earliest versions around (if not the earliest).

If your board is one of the later models (ie with PCI slots or VLB that supports bus mastering), you might be in luck ...
by bc
Thu Jul 01, 2004 5:48 pm
Forum: In-depth High-tech BIOS section
Topic: NTSC (TV scanrate) VGA in BIOS success
Replies: 6
Views: 8119

:P woohoo :P
After some bugfixing to the driver, it now works as expected.
The energy* logo now appears as well. The problems I had were due to
the driver forcing mode 03 and clearing the screen on initialization.
Also, mode's 8x were not properly trapped and caused the cmos config screen to jump ...
by bc
Thu Jul 01, 2004 5:46 pm
Forum: In-depth High-tech BIOS section
Topic: NTSC (TV scanrate) VGA in BIOS success
Replies: 6
Views: 8119

8O how simple.

Acutally, it does clear up some things.
It looks like nothing really prevents writing to local data segments
so long as the memory is not explicitly locked.

But then what is the techique to locking memory (making it read-only)?
Is this a chipset-specific thing? Are there well ...
by bc
Tue Jun 29, 2004 7:26 pm
Forum: In-depth High-tech BIOS section
Topic: NTSC (TV scanrate) VGA in BIOS success
Replies: 6
Views: 8119

Sorry, when I said "EPA Procedure", I was moreless referring to the code that
draws the EPA logo on the screen. I may very well have made a modification to
the EPA procedure itself (ie a method within).
For me, however, this is desirable. Since I want the video bios to
initialize and insert its ...
by bc
Mon Jun 28, 2004 10:42 pm
Forum: In-depth High-tech BIOS section
Topic: NTSC (TV scanrate) VGA in BIOS success
Replies: 6
Views: 8119

NTSC (TV scanrate) VGA in BIOS success

I was successful in patching my Award 4.51pg bios to post in an NTSC video mode.

Many old mono monitors, TV's, small LCD's etc are fixed-scan at NTSC
clockrates and have different sync-pulse characteristics. Most, if not all,
VGA cards can drive at these rates, but there was never an "official IBM ...