Tandy 1000 Technical Reference Manual

Tandy 1000
3-2. CIRCUIT DESCRIPTIONS
Technical Reference Manual
The electronics of the FDD is constructed with three sections which are
read write circuit, control circuit, and servo circuit. Read write
circuit and control circuit are mounted on the PCBA MFD control, and servo
circuit is on the PCBA DO motor servo.
3-2-1. Read Write Circuit
The read write circuit is constructed with read circuit, write circuit,
and low voltage sensor. They are mostly packed in a read write LSI
(bipolar) •
Fig.303 shows the block diagram.
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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