Tandy 1000 Programmer's Reference Guide

Chapter 1 I System Calls
SetTime
Set Time Function Call 2DH
Sets the time to a valid time in binary given in CX and
DX.
Entry Conditions:
AH = 2DH
CH
= hour (0-23)
CL = minutes (0-59)
DH = seconds (0-59)
DL = hundredths of a second (0-99)
E xi t Conditions :
If AL = 00H, the time specified on entry is valid.
If AL = FFH, the time was not valid; the function was
canceled.
Macro Definition:
set-t ime macro hour,m~nutes,seconds,hundredths
mov ch,hour
mov cl,minute5
mov dh,seconds
mov d1,hundredths
mov ah,2DH
Int
21 H
endm
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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