Tandy 1000 Programmer's Reference Guide

Chapter 1 I System Calls
Example:
The following program verifies the existence of the file
named in reply to the prompt.
fcb db
prompt db
reply db
Ye5 db
no db
f unc-29H : display
get-string
parse
search-first 1
CmP
Je
display
J mP
not-there: display
continue:
37 dup (7)
"Filename: 0"
17 dup(7)
"F I LE EX I STS" , 1 3,l E , "0 "
"F I LE DOES NOT EX I ST" , 1 3,l B , "0"
prompt ;see Function E9H
15 ,reply ;see Function EAH
reply[2l ,fcb ;THIS FUNCTION
'cb ;see Function 11H
a1,BFFH ;dir. entry found?
not-there ;no
Ye5 ;see Function E9H
continue
no
84

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