Tandy 1000 Programmer's Reference Guide

ChaDter 1 I System Calls
ResetDisk
Reset Disk Function Call ODH
Ensures that the internal buffer cache matches the disks
in the drives. This call flushes all file buffers. All buffers
that have been modified are written to disk and all buff-
ers in the internal cache are marked as free. Directory
entries are not updated; you must close files that have
changed in order to update their directory entries (see
Function Call 10H, Close File).
This function need not be called before
a disk change if
all files that were written to have been closed. It is gen-
erally used
to force a known state of the system; CON-
TROL-C interrupt handlers should call this function.
Entry Conditions:
AH - ODH
Macro Definition:
reset-disk macro disk
mov ah, 0DH
int 21 H
endm
Example:
mov ah, 0DH
int 21 H
;There are no errors returned by this call.
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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