Tandy 1000 Programmer's Reference Guide

Chawter 1 I System Calls
Keepprocess
Keep Process
Function Call 31H
Terminates the current process and attempts to set the in-
itial allocation block
to the specified size in paragraphs.
No other allocation blocks belonging
to that process are
freed. The exit code passed in
AX is retrievable by the
parent via function call
4DH.
This method is preferred over Interrupt 27H and has the
advantage
of allowing more than 64K to be kept.
Entry Conditions:
AH = 31H
AL
= exit code
DX = memory size in paragraphs
Error Returns: None.
Example:
KeepProce55 eq" 31 H
mov a1,exitcode
mov dx,parasize
mov ah,KeepProce55
int 21 H
95

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