Tandy 1000 Programmer's Reference Guide

Chapter 1 I System Calls
Macro Definition:
search-first macro fcb
mov dx,offsetfcb
mov ah,llH
int 21
H
endm
Example:
The following program verifies the existence of a file named RE-
PORT.ASM on the disk in Drive B.
Yes
no
fcb
buffer
crlf
func-1
1 H:
not-there:
continue:
db "FILE EXISTS.
0"
db "FILEDOESNOTEX1ST.O"
db 2,"REPORT
ASM"
db 25 dup (7)
db 128 dup (7)
db 1 3 ,I 0 , " S "
set-dtabuffer
search-first fcb
cmp al,0FFH
le not-there
display yes
JmP continue
display no
display crlf
;see Function 1AH
;THIS FUNCTION
;directoryentry found?
;no
;seeFunctionE9H
;seeFunction 09H
;seeFunction 09H
53

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