Tandy 1000 Programmer's Reference Guide

Chapter 1 I System Calls
SearchNext
Search for Next Entry
Function Call
12H
Used after Function Call 1lH (Search for First Entry) to find
additional directory entries that match a filename that contains
wildcard characters. The
? wildcard character in the filename
matches any character. This call searches the disk directory for
the next matching name.
To search for hidden or system files,
DS:DX must point to the
first byte of the extended FCB prefix.
If a directory entry for the filename in the FCB is found, an un-
opened FCB of the same type (normal or extended)
is created at
the Disk Transfer Address.
Entry Conditions:
AH = 12H
DS:DX
= pointer to the unopened FCB of the file for which to
search
Exit Conditions:
If AL = BBH, a directory entry was found.
If AL
= FFH, no directory entry was found.
Macro Definition:
search-next macro fcb
mov dx,offset fcb
mOV ah,l2H
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