Keith A Grider (kgrider@magnus.acs.ohio-state.edu)
reported (12/5/93) that
I have seen many postings concerning this with exit from X as well as
exiting from a graphic dos screen. it seems to be prevalent among ATI
graphic card users as well as a few others. The problem is that the
font information for the vga text screen is not being saved. The only
way I have been able to fix it is to download the
vgalib-090.tar.gz file from sunsite.unc.edu. It is (I
believe) in the pub/Linux/GCC directory. You get a lot of
stuff that is not directly used to solve this problem, but in the
fonts directory that is created when you untar the file, there are 2
files of interest, runx and restorefont. Read the README file in this
directory. Copy runx and restorefont to a directory in your path.
when runx is used, for example, it saves the font information in
tmp/fontdata. I use a file called fix which consists of the line:
restorefont -r /tmp/fontdataso that it is easy to 'fix' a vt when I go there from X (i.e.
ctrl-alt-f2). This should also work for dosemu. I
think the XFree86 people know about the problem and are working on a
solution as this is a bit of a kluge.
[The screen flickers violently, displays the video BIOS startup
message, and hangs.]
Andrew Tridgell (tridge@nimbus.anu.edu.au) reported (1/29/94)
that
I found with early versions it would work if I used:
ports { 0x42 }
but that sometimes my machine would crash when it was cycling the
video bios in dosemu. This is because you're allowing the VGA bios to
re-program your clock, which severely stuffs with Linux.
This prompted me to write the readonly and masking patches for dosemu, which I believe are still in the latest version. I now use:
ports { readonly 0x42 }
and it boots dosemu more slowly, but more reliably.
---------------------
Tim Shnaider (tims@kcbbs.gen.nz) also reported (1/18/94) that
One way of fixing this is to use the GETROM program to dump your video
bios to a file and edit the config file in the /etc/dosemu
directory There will be a few video lines. Here is my video line
video { vga console graphics chipset trident memsize 1024 vbios_file
/etc/dosemu/vbios }
where vbios is the file generated by typing
getrom > vbios
---------------------
Douglas Gleichman (p86884@tcville.edsg.hac.com) reported
(9/1/94) that (with the ATI Graphics Ultra)
For DOSEMU 0.52 you need to add this line to your dosemu.conf file:
ports { 0x1ce 0x1cf 0x238 0x23b 0x23c 0x23f 0x9ae8 0x9ae9 0x9aee 0x9aef }
The board self test will list a failure but graphics programs will
run fine.
Hannu Savolainen (hsavolai@cs.Helsinki.FI) reported
(3/21/94) that
The DOSEMU and any DOS program with it run under control of a protected mode operating system. This means that the memory is not mapped as the program expects. If it somehow manages to start DMA based recording with SB, the recorded sound doesn't find it's way to the application. It just destroys some data in the memory.
James B. MacLean (jmaclean@fox.nstn.ns.ca) reported
(6/19/94) that
Sorry to disappoint, but at this time DOSEMU does not support directly the necessary interception of interrupts or DMA generally required for sound card access via DOSEMU :-(.
It's bound to happen at some future date though :-),
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