changes.mach64

linux 下svgalib编的一个界面程序示例

Mach64 driver changes log:
--------------------------
April 11, 1998 (Michael Weller)
 VGA Emulation should be used to avoid MACH64 code in get_lut
    (and elsewhere?)

March 17, 1996 (Asad Hanif)

NON FUNCTIONAL DRIVER sent for inclusion in 1.2.10

It doesn't seem to quite work.  Its hardcoded to 640x480x256@60hz for
a WINTURBO 2mbVRAM and 68860 ramdac - with the 18818 clock.
The screen has vertical bars thru it... each 64k chunk is a little offset
and its full of crap.  I can't seem to track the problem down.  I checked
the CRTC registers, and dac programming.  They are similar to what I got
from ATI and based on what I yanked from XFree86.

Help.

Added dac handling code to vgapal.c.

Didn't work so I stripped it clean.  Removed clock programming... 
fixed  the dac to 68860 and clock to 8 - the default clock setting.
Based code on combination of ATI's SDK and the mach64 x server.

Went from a.out to elf.
Discovered a hell of a lof of segfaults.  Due to my attempts to be nice
and unmap and free any mapped/allocated ram... uncommented worked fine.

Nov 18, 1995 (Asad Hanif)

Re-synced to pre 1.2.9 from 1.2.7

Sept 25, 1995 (Asad Hanif)

So I'm lazy (actually busy)

Well... I got the updated SDK from ATI.  Updated the autodetect function
to reflect the SDK recommendations.  I'm gonna avoid using the Extended
vga registers to try and maintain compatability with the CT/ET.  So all
work will be done with the Mach64 controller thingy.

It now downloads all the necessary data from the rom.


Sept 2, 1995 (Asad Hanif)

Stuck in a register dumper so I know what I see.

It's still a vga driver.



Aug 30, 1995 (Asad Hanif)

This files was created to log all the changes made to svgalib-1.2.7 in 
order to incorporate an ATI Mach 64 driver.

libvga.h:	The Mach64 has 32 bit registers.  The libvga.h doesn't
		have code for inl and outl.  These were added.
vga.h:		Well.. gotta tell it there's a new driver.
		Mach64 = 13 ooohh.. lucky number.  But its actually
		the 14th driver-- if you count from 0. :)
vga.c:		Added the driver to the list. 
config.h:	Added some INCLUDE_MACH64_...
driver.h:	Added the extern driver specs thingy.
Makefile.aout:	stuck a line in their about mach64.c

mach64.regs:	Named register list.
mach64.h:	Header file.
mach64.c:	Driver.
mach64.CHANGES:	You're look at it.	

Genesis