Tandy 1000 Programmer's Reference Guide

Chapter 1 I System Calls
Wait
Retrieve the Function Call 4DH
Return Code of a Child
Returns the Exit code specified by a child process. It returns
this Exit code only once. The low byte of this code is sent by the
Keep Process function call (31H). The high byte indicates the
circumstances that caused the child
to terminate, and is one of
the following:
0- Terminate/abort
2- Hard error
3- Terminate and stay resident
1- CONTROL-C
Entry Conditions:
AH = 4DH
Exit Conditions:
AH = exit code
Error Returns: None.
Example:
Wait =qu 4DH
mov ah, Wait
int 21 H
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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