Tandy 1000 Technical Reference Manual

Tandy 1000
4-2-4-4. Level disk calibration
Technical Reference Manual
Setting of the following calibration value is required for accurate
measurement before the check of the read level or the resolution.
Use a level disk with a calibration value (100\ center) written on the
label. The setting will be maintained until the main DC power (for SKA)
is turned off or unitl the RESET switch of the SKA is depressed.
If the calibration value is the same as the initial value (100\) of thE
SKA, the initial setting of the following is not required.
(1) Innermost track read level
(a) Key in "DO". (CALIBRATION READ LEVEL)
(b) Calibration value set at that time is indicated in the latter three
digits of the DATA indicator CIJ[IJ (\).
(c) Key in a new calibration value written on the level disk label
(three digits, Max.)
(d) Key in "F". (STOP)
Note: If there is no calibration change in item (b), omit item (c) and
depress "F" key.
(2) Innermost track resolution
(a) Key in "Dl". (CALIBRATION RESOLUTION)
(b) Calibration value set at that time is indicated in the latter
three digits of the DATA indicator CIJ:IJ (\).
(c) Key in a new calibration value written on the level disk label
(three digits, Max.)
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Tandy 1000 Specifications

General

Processor	Intel 8088
Processor Speed	4.77 MHz
RAM	128 KB (expandable to 640 KB)
Operating System	MS-DOS 2.11
Manufacturer	Tandy Corporation
Release Year	1984
Storage	Single or double 5.25" floppy disk drive (360 KB), optional hard drive
Sound	Tandy 3-voice sound
Ports	Parallel, Serial
Graphics	CGA (Color Graphics Adapter)
Graphics Modes	320x200, 640x200