Tandy 1000 Programmer's Reference Guide

Chapter 1 I System Calls
createmacrofcb
mov dx,offset fcb
mov ah,l6H
int 21
H
endm
rename macra fcb,newname
mov dx,offsetfcb
mov ah,l7H
int 21 H
endm
current-disk macro
mov ah,lSH
int 21
H
endm
set-dtamacrobuffer
mov dx,offsetbuffer
mov ah,lAH
int 21
H
endm
read-ranmacro fcb
mov dx,offsetfcb
mov ah,2lH
int 21 H
endm
write-ranmacrofcb
mov dx,offsetfcb
mov ah,22H
int 21
H
endm
file-sizemacrofcb
mov dx,offsetfcb
mov ah,23H
int 21
H
endm
5et-relative-record macro fcb
mov dx,offsetfcb
mov ah ,24H
int 21
H
endm
;CREATE
;function 16H
;RENAME
;function 17H
;CURRENT-DISK
;function 19H
;SET-DTA
;function 1AH
; READ-RAN
;function 21 H
;WRITE-RAN
;function22H
;FILE-SIZE
;function 23H
;SET-RELATIVE-RECORD
;function24H
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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