Kaypro 2 - 16-13.TIFF

Use
System:
Port#
(hex)
14 - 17
Device
74 373
74 244
Function
System output port.
Bit functions.
o 0=Select floppy A (C on Kl0).
1 0=Select floppy B (Hard disk
on Kl0).
2 0=Select side 2.
3 PSTROB
4
0=Floppy motor on (48 tpi
drives) .
l=Select high speed (High
density drive). * see note
5 fZ'=8elect double-density.
6 0=Select normal character set.
7 0=Select 64K RAM.
l=Select RCM (RAM 8fZ'00-FFFF).
System input port.
Bit functions.
12' 0=floppy A selected (C on KlfZ').
1 0=floppy B selected
(Hard disk on KlfZ').
2 0=Side 2 selected.
3 PSTROO.
4 0=rcotor is on (48 tpi floppy).
5 0=Double-density is selected.
6 0=Parallel printer is busy.
7 0=641< RAM is selected.
l=RCM (RAM 8000-FFFF) selected.
* Note on high-density drives:
A 1 in bit position 4 will select high speed on the high-density diskette
drive. To reset the drive to low speed it is necessary to change this bit to a
12' AND open the drive door, then close it.
16-13