Tandy 1000 Technical Reference Manual

Tandy 1000
0378
Bit
o
1
2
3
4
5
6
7
0379
Bit
o
1
2
3
4
5
6
7
Address
12
0370
0371
0372
0373
0374
0375
0376
0377
0378
0379
037A
037B
037C
0370
037E
037F
Technical Reference Manual
Description
Data Bit 0 - LSB
Data Bit 1 -
Data Bit 2 -
Data Bit
3 -
Data Bit 4 -
Data Bit 5 -
Data Bit 6 -
Data Bit 7 - MSB
Description
Not used
Not used
Not used
o Error
1 = Printer Selected
o = End Of Form
o = Acknowledge
o = Busy
Description
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Printer - Data Latch
Printer - Read Status
Printer - Control Latch
Printer - Not used
Printer - Data Latch
Printer - Read Status
Printer - Control Latch
Printer - Not used
12. AO and A1 are decoded by printer logic. The assigned addresses are 0378 - 0378. A2 = X,
and X = don't care.
Detailed Memory Map--Continued
67

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