HP Vectra Technical Reference Manual page 251

FLEXIBLE
DISC ONLY
SYSTEM
Figure 8.1
FLEXIBLE & HARD
DISC SYSTEM
HARD
DISC
DRIVER
FLEXIBLE
DISC
DRIVER
DISKETIE
PARAMETER
TABLE
HARD DISC
PARAMETER
TABLE FOR
DEVICE 80H
HARD DISC
PARAMETER
TABLE FOR
DEVICE 81H
"'~"----------Il
INT 41 H
1
Flexible and hard disc code modules
• The hard disc driver calculates and saves its own starting device number. The device number
is
SOH
+
In' where In' is the current number of drives determined in the previous step.
• If this is the first hard disc configured in the system then the flexible disc driver address in
INT
13H (O:04CH) must be moved to INT 40H (0: 1OOH). If this is not the first hard disc driver then
the address of the previously added hard disc driver in INT 13H is saved in RAM for future
calls to that previously linked driver.
242 Disc