[comp.sys.ibm.pc] PC/AT Questions

bhilden@drutx.ATT.COM (HildenbrandBE) (05/24/87)

I have a friend who has a PC/AT clone and he has a couple
of burning questions.

1) Tom has a Tseng Laboratories ULTRA PAK copy of the Hercules
card and is trying to use the card to put his Microsoft mouse
in graphics mode(using Turbo Pascal).

It is his understanding that the "display mode address" is
at 0040:0049(segment:offset) and the mode he would like to
program is a "6" to get graphics mode.

OK, so when he puts a 4, 5, or 6 at this address, the whole
screen locks up.

The questions I have is:

Basically, how do you turn on the graphics cursor for the
Microsoft mouse with Turbo Pascal?

What is the correct address for the "display mode"?

What is the correct mode value top be put at this address to get
graphics mode?


Next problem.  How do you program the PC/AT "time-of-day" clock
to keep the correct time even when the PC/AT is powered down?

Tom and I would appreciate any information, please E-mail replies.

Thanks in advance,

Bruce Hildenbrand
ihnp4!druhi!bhilden
AT&T ISL Denver
(303)538-4687