19 Feb
2001
19 Feb
'01
2:08 p.m.
At 12:29 PM 2/19/01 -0800, you wrote:
I have an HP-85B with I/O ROM, the HP-IB interface and
an 82901M 5 1/4" flexible disk drive unit (there are
address switches on the back of the disk drive - now
set to 000)? I want to access the drive from the 85B,
and believe that I have all the necessary parts, but I
lack the I/O ROM manual which, as I understand it,
describes the extended BASIC commands (such as CONTROL
x,y;a). So, I have a question:
Once I hook all of this up, how do I access the disk
drive, read from it, save to it and format a diskette?
Wayne Smith
For most basic operations you don't even need those ROMS.
Ok, here's some info:
file names have the form: "file:msus", where
msus=mass storage unit specifier. Typical msus are:
":D000" electronic disc
":D700" mass storage on HPIB bus (interface code 7)
with HPIB ID=0, and unit number = 0;
":D910" mass storage on HPIL loop (interface code 9);
with HPIL address 1, and unit number = 0.
":D751" If you have an HP82901M dual HPIB floppy drive
at HPIB address 5, this is the msus for the second
floppy.
":T" The msus for the internal tape drive
Now, some commands
MASS STORAGE IS ":D000" - defines electronic disc as default msus
COPY "MYFILE" TO "MYFILE:D710" - copies "MYFILE" in default
msus to
to an HPIB mass storage device at
HPIB addr = 1.
INITIALIZE "MYLABEL", ":D720" - formats HPIB drive w. addr=2, using
standard LIF directory size and
interleave, and with a volume
label "MYLABEL". You can later refer to
a file in this volume as "MYFILE.MYLABEL"
ERASETAPE - format a tape
MSI ":D710" - equivalent to: MASS STORAGE IS ":D720"
CAT ".MYVOLUME" or CAT ":D720" both work.
DISC FREE S,T, ":D720" stores the number of free records in msus
"D720"
in variable S, and the number of records in the
largest contiguous free area of ":D720" in
variable T.
MSUS$ returns the msus of the current MASS STORAGE IS device
VOL$ returns a six character string indicating the volume label in the
current MSI device; VOL$(":D700") you guess it.
This should be enough for you to play for a while.
Regards,
Carlos.