Tandy 1000 Programmer's Reference Guide

Chapter 1 I System Calls
Example:
The following program sets the system clock to 0 and
continuously displays the time. When a character is typed,
the display freezes; when another character
is typed, the
clock is reset to 0 and the display starts again.
time db "00: 00: 00 I 00", 13,10 ,"$"
ten db 10
f unc-2DH : 5et-time 0,0,0,0
read-clock: get-time
convert ch,ten,time
convert cl,ten,time[31
convert dh,ten,time[61
convert dl,ten,time[91
display time
TH15 FUNCTION
5ee Function 2CH
5ee end of chapter
5ee end of chapter
5ee end of chapter
5ee end of chapter
5ee Function 09H
dir-console-io EFFH ;see Function 06H
CmP al,00H ;wa5 a char. typed?
1ne 5tOP ;yes, 5top the timer
Imp read-clock ;no keep timer on
stop: read-k bd ;5ee Function 08H
Imp f unc-2DH ;keep displaying time
90

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