Tandy 1000 Programmer's Reference Guide

Chapter 1 I System Calls
CurrentDir
Return Text of
Current Directory
Function Call
47H
Returns the current directory for a particular drive. The direc-
tory
is root-relative and does not contain the drive specifier or
leading path separator.
Entry Conditions:
AH = 47H
DS:SI = pointer to 64-byte memory area to receive directory
DL = drive (0 = default, 1 = A, 2 = B, etc.)
Exit Conditions:
Carry set:
Carry not set:
Error Returns:
AX = 15
AX = error code
DS:DI = pointer to 64-byte area containing directory
Invalid drive. The drive specified in DL was invalid.
Example:
CurrentDir equ 47H
Ids 51, area
mov
dl, drive
mow ah, CurrentDir
int
21 H
122

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