ACT apricot - Page 291

CONTROL DEVICE
COM=4
Format the disk using the parameters set up above.
h.
Cache/Graphics/IBM configuration
This choice selects how the memory area used for Cache,
Graphics, or IBM
PC emulation is to be used by the BIOS.
DEV-42H
COM-Oto3
DAT-Oto2
COM=O
Return the status in DA T. If 0 is returned, then the user is
free
to change the usage factor of the memory. IF OFFFH is
returned the user is still free to change the usage factor,
however,
the BIOS may still be using the memory.
COM=l
Switch the Disk CACHE on or off:
DAT=O-On
DAT= I-Off
COM=2
Set the Graphics on/off flag in the parallel driver:
DAT=O-On
DAT=I-0ff
COM=3
Set/Reset the IBM PC emulation flag:
DAT=O-On
DAT= I-Off