60 lines
1.9 KiB
Plaintext
60 lines
1.9 KiB
Plaintext
|
|
______ ____ ______ _____ ______
|
|
| ____| | _ \| ____| / / _ \| ____|
|
|
| |__ _ __ ___ ___| |_) | |__ / / |_| | |__
|
|
| __| '__/ _ \/ _ \ _ <| __| / /| _ | __|
|
|
| | | | | __/ __/ |_) | |____ / / | | | | |
|
|
|_| |_| \___|\___|____/|______/_/ |_| |_|_|
|
|
|
|
|
|
Avance Logic driver notes
|
|
|
|
|
|
Notes:
|
|
|
|
This is based upon the stub driver implementation, with
|
|
ALG-specific code added bit by bit.
|
|
|
|
Information on the Avance Logic range of cards is taken
|
|
from the VGADOC package.
|
|
|
|
As far as I know, this driver should support the following
|
|
cards:
|
|
|
|
ALG-2101, ALG-2201, ALG-2228, ALG-2301, ALG-2302
|
|
|
|
Some of these cards can provide hardware acceleration on
|
|
blits and lines, and a hardware cursor. Support for these
|
|
features is not yet implemented into this driver.
|
|
|
|
|
|
Special note for ALG-2101 and ALG-2302 users:
|
|
|
|
I'm not quite sure how to tell the difference between
|
|
ALG-2101 and ALG-2302; I have the latter but have found
|
|
no specific documentation about it. The documented
|
|
detection routines return ALG-2101. I have used an
|
|
underdocumented register to try to tell the difference,
|
|
but this might not work. If you have either of these
|
|
and the driver detects the wrong one, please let me know.
|
|
It won't affect the operation of the driver; it's just
|
|
nice when a program detects your hardware correctly.
|
|
|
|
|
|
History:
|
|
13/04/98 -- first version; just a copy of the stub driver.
|
|
|
|
15/04/98 -- removed VESA code, replaced with hardware-
|
|
level code.
|
|
|
|
20/04/98 -- finished implementing DrawScan, started lying
|
|
about supporting hardware acceleration, tested with
|
|
Allegro, corrected big bug in DrawScan.
|
|
|
|
01/11/98 -- Shawn Hargreaves removed hardware acceleration bodge: it
|
|
now admits that it is a dumb framebuffer driver :-)
|
|
|
|
|
|
Author:
|
|
George Foot <george.foot@merton.oxford.ac.uk>
|