Tandy 1000 Programmer's Reference Guide

Chapter 1 I System Calls
SeqRead
Sequential Read Function Call 14H
Reads a record sequentially. The record pointed to by the current
block (offset 0CH) and the current record (offset 20H) fields
of
the FCB is loaded at the Disk Transfer Address. The current
block and current record fields are then incremented.
The record size is set
to the value at offset OEH in the FCB.
Entry Conditions:
AH = 14H
DS:DX
= pointer to the opened FCB of the file to read
Exit Conditions:
If AL = 00H, the read was completed successfully.
If AL
= 01H, end of file was encountered; there was no data in
If AL = 02H, there was not enough room at the Disk Transfer
If AL
= 03H, end of file was encountered; a partial record was
Macro Definition:
the record.
Address
to read 1 record; the read was canceled.
read and padded
to the record length with zeroes.
read-seq macro fcb
mov dx,offsetfcb
mov ah,l4H
int 21 H
endm
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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