Service manual

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1"-- DOUBLE-DENSITY DISK CONTROLLER
TEST will now ask for the hardware unit number of the drive you want tested. For
example:
WHICH DRIVE (0/1/2)?
At this prompt, enter the hardware unit number of the drive which you want to test and
press RETURN. If this is your first time through the test, we recommend that you test
drive
o. After you have selected a drive number between 0 and 2, TEST will print the
following menu:
FUNCTIONS AVAILABLE:
T - DISPLAY DRIVE ROTATION SPEED
D - GENERAL DRIVE CHECKOUT
M- MEDIA CHECK (SECTOR VALIDITY)
S - PERFORM SEEK TIME CHECKOUT
U - SELECT ANOTHER DRIVE UNIT
E - EXIT TO BOOT PROGRAM
A - ALIGN DRIVE HEAD
F - FORMAT DISK
CTRL-C CANCELS THE TEST IN PROGRESS.
OPTION:
To start any test, type the letter which precedes the name of the test in the TEST menu
and then press RETURN. Since you must format the diskette before performing any tests,
select
menu option F and press RETURN. U
Available Tests and Options
The following sections describe the various tests and the options available. To end any
test or menu option early, hold down the CTRL key and simultaneously type the letter C.
F - FORMAT DISK SURFACE
The Format Disk Surface option prepares a soft-sectored blank diskette for use with the
TEST diagnostics. Use the Format Disk Surface option with any diskette which has not
previously been formatted for TEST.
The format option begins by instructing you to insert a diskette. For example:
Insert a diskette into unit ?
Press the RETURN key to format the diskette.
At this point, insert a soft-sectored diskette into the drive whose hardware number the
program substituted for? in the sample message given above. When you have inserted
the diskette, press RETURN. Be sure the diskette you insert is either blank or does not
contain any valuableinformation, since the format option destroys all information on the
diskette which it formats.