Tandy 1000 Programmer's Reference Guide

Chapter 1 I System Calls
Example:
The following program copies the contents of a single sided disk
in Drive
A to the disk in Drive B, verifying each write. It uses a
buffer of 32K bytes.
off equ 0
on equ 1
prompt db "Source in A, target in B",13,10
db "Any key to start. $"
start dw 0
buffer db 64 dup (512 dup(7));64 sectors
1nt-26H: display prompt ;see Function 09H
read-kbd ;see Function 08H
verify on ;see Function 2EH
mov CX,~ ;copy 5 groups of 64
; sec t or5
copy: push cx ;save the loop counter
abs_disk_read0,buffer,64,start ;see INT25H
abs-disk-write 1, buffer,64,5tart ;THIS INTERRUPl
add start,64 ;do the next 64 sectors
POP cx
;restore the loop counter
verify off ;see Function ZEH
loop copy
23

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