Tandy 1000 Technical Reference Manual

Tandy 1000 Technical Reference Manual
Stepping
motor
TRACK 00
INDEX
READY
WRITE
PRCYrECT
Index detector
TP2
Track 00 detector
Output
driver
Erase gate
t--t--+--------- Write gate
~+-.....,..---------e ront bezel
indicator
t--t--r----------Spindle motor
Write/erase
gate
Indicator
gate
Ready
detector
Pulse
generator
t---+--lFile protect detector
I
I
I
I
I
I
I
L. __
!--"""'H--l Spindle motor
gate
LVS
Drive
select
gate
Stepping motorl--+--+-_-1
--------+: -+-I g~~~~N
I
DIRECTION
SELECT
STEP
WRITE
GATE
MOTOR 0
IN USE
DRIVE
SELECT
0"'3
(Fig.3081 Control circuit block diagram
- 316 -

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