[net.micro.pc] Microsoft SystemCard Clock I/O Addresses

papa%USC-CSE@USC-ECL.ARPA (07/25/84)

From:  Marco Papa <papa%USC-CSE@USC-ECL.ARPA>


I would like to know whether anyone on the net has information about the
I/O addresses of the Clock-Calendar chip of the Microsoft SystemCard.  The
documentation that comes with it is absolutely terrible.  It just says that
"the SystemCard clock/calendar is similar to the IBM system clock".  A call
to Microsoft Product Support Department produced nothing since they cannot
disclose this information.  A very different policy from AST that documents
thoroughly everything about its hardware.  I would like to use the
SystemCard with PC/IX as Herm Fisher's astclock program in the info-ibmpc
library.  The I/O addresses I am looking for are as follows:

counter - seconds
counter - minutes
counter - hours
counter - day of the week
counter - day of the month
counter - month
counter - year (-80?)

Thanks for any help.

Marco Papa

ARPA, CSNET: papa.usc-cse@csnet-relay
UUCP: ..!randvax!uscvax!papa