Tandy 1000 Programmer's Reference Guide

ChaDter 1 I System Calls
SetVerify
Set/Reset Verify Flag
Function
Call 2EH
Specifies whether each disk write is to be verified or not.
MS-DOS checks this flag each time it writes to a disk.
The verify flag
is normally off.
Entry Conditions:
AH =2EH
AL
= verify Flag
OOH = do not verify
01H = verify
Macro Definition:
verify macro switch
mov a1,switch
mov ah,2EH
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