Tandy 1000 Programmer's Reference Guide

Chapter 1 I System Calls
reset-di5t macrodisk
mov ah, EDH
int 21
H
endm
select-di5kmacrodisk
mov dl,dlsk[-651
mov ah,EEH
int 21
H
endm
openmacrofcb
mov dx,offsetfcb
mow ah,EFH
int 21
H
endm
closemacrofcb
mov dx,offset fcb
mov ah,llH
int 21
H
endm
search-first macrofcb
mov dx,offsetfcb
mov ah,llH
int 21
H
endm
search-nextmacrofcb
mow dx,offsetfcb
mov ah,l2H
int 21
H
endm
deletemacrofcb
mov dx,offsetfcb
mov ah,l3H
int 21
H
endm
read-seq macro fcb
mov dx,offsetfcb
mov ah,l4H
int
21 H
endm
write-seqmacrofcb
mov dx,offsetfcb
mov ah,l5H
int 21
H
endm
;RESETDISK
;function EDH
;SELECT-DISK
;functionEEH
;OPEN
;functionEFH
;CLOSE
;function
IEH
;SEARCH-FIRST
;Function 11H
;SEARCH-NEXT
:function 12H
;DELETE
:function 13H
;READ-SEQ
;function 14H
;WRITE-SEQ
:function 15H
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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