Tandy 1000 Technical Reference Manual

Tandy 1000
(2) SKA method
Technical Reference Manual
(a) Connect the SKA according to item 4-2-4 and set the FD PWR switch to
the PSA side.
(b) Start the spindle motor by key "5". (MON indicator turns on).
Install a work disk and execute drive select by key "0". (DSO
indicator turns on).
(c;) Key in "CO" and confirm that the TRACK indicator becomes "00".
( RECALIBRATE)
(d) Key in "Cl" (SEEK TMAX)
(e) Key in "D3". (WRITE/READ LEVEL PRE 2F)
(f) Write 2F and read operations are repeated.
The DATA indicator [JJ[lJ (mV) indicates the average read level
of TP7 and TPB (Pre-amp.) after each cycle of operation (one rotation
of write and one rotation of read) is finished.
(g) Observe the DATA indicator [JJ[JJ (mV) with a slight depression
(very slight depression easy to release: 10 ~ 20g) by a finger on
the top of the upper head (double sided) or of the pad arm (single
sided).
(h) Confirm that the read level measured in item (f) is more than 80\ of
that in item (g).
(i) For a double sided FDD, depress "F" key to stop and then depress
"4" key to execute items (e) through (h) for the side ° and the side
1 heads respectively. The side is changed alternately by a depression
of "4" key. If side 1 is selected, SIDE 1 indicator of the SKA turns
on.
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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