Tandy 1000 Technical Reference Manual

Tandy 1000
Technical Reference Manual
8272A
Table 4. 8272A Command Set (Continued)
r
SHASE- l~05 o:;_A ~s 0-" 0, 0"- REMARKS_~_ ~I P~
READ A TRACK
-- -----
Command: ~ M~M s; ~ ~ H~S D~l D~O Command Codes command:
W C _ Sector 10 Informahon W
W
H pnor to Command W
W R _ elecutlon W
WNW
W EOT W
W GPL W
W OTL W
DATA IUS
MT MFM 5K 1 1 0 0 1
o 0 0 0 0 HPS OSl PSO
C
H
A _
_ N _
EOT
GPL
STP
Command Codes
Sector 10 intormation
prior Command
8ll:8cution
~~!,.!" __ EC~UAl
MT MFM SI< , 0 0 0 , Command Codes
o 0 0 a 0 HOS OS1 050
C Sector 10 In!ormalion
H pnor to Command
R eKecutlon
N
EaT
GPL
STP
READ 10
o 1 0 1 0 I Commands
o 0 HOS OS, OSO
The flfSI correct lO
mformatlon on the
Cylinder IS stored In
Da1a Register
SeClOr 10 informahon
alter Command
execution
Command Codes
Sector 10 Information
pnor Command
execu1ion
Status Inlormallon
after Command
eKeculton
Data compared
bet ..... een lhe FOD
and main-system
Status informallon
after Command
execution
Sector 10 In!ormaiion
alIef Command
eKecu!ion
Data compared
between the FOO
and main-system
STO
ST 1
ST2
C
R
N
STO
__ ST 1
ST 2
C
H
A
__ N
SCAN HIGH OR EQUAL
MT MFM SK 1 1 a 1
a 0 0 0 0 HOS OS1 OSO
C
H
A
N
EaT
GPL
STP _
W
W
W
W
W
W
W
W
W
AECil-IIi"RATi-
-0-0-~-'-'----1-1o~~and Codea
o 0 0 0 OS1 OSO
Head retracted to
fracllO
----- ---------- - ------._----
SENSE INTERRUPT STATUS
commandf ] 0--0 0- o-~,o--o 0 ]Gomma~;d Code.
AeSUI'~~ . ~ = -=-~__ _ -~-~_ ~~~ =- __ ~:==~-_ ~~:t~~;~~:::~i~~a~
operation about the
FoC
-- - ------ .- ------ -- -----------
SPECIFy
_
comma~~~.~l~~W j~·.-o---- 0 0- -0 ---o--o----~~ ; r~;m~~C~d~;
SRT _ _... HUT _
_ Hl T . NO
----------- -- ---- -------
SENSE DRIVE STATUS
o 0 1--0 0lcommandCOd;S-
o 0 HOS OS1 OSO
ST 3 _ _ Status Information
about FOO
-- - ---
SEEK
0- 1 1 1 I r~omma-.;oGOdes
o 0 HOS OS1 OSO
NCN
Head IS POSit oned
o ... er proper Cylinder
on Olslo:,elle
Command W
Command W
W
W
INVALID
--I-~v~l;"dC~des ~-- -----~~ - r~.~~;-~nfDC
goes lnlD Standby
Stale)
STO __ _ STO=80
(16)
L-_--'-_-'-- _
Slalusm/ormalion
alIef Command
execution
Sector 10 Informallon
alter Command
elleCU!lon
Sector 10 informalton
aller Command
execution
Dala transfer
bet ..... een lhe FDD
and main-system
FOe reads all ot
cylinders contents
from inde) hole 10
EDT
In thiS case, the 10
Inlormatlon has no
meaning
Data compared
bet ..... een ttle FDD
and main· system
Status information
allerGommand
eKecutlon
ST 0
ST1
512
C
R
N
ST 0
ST 1
ST2
C
H
A
N
>.4F>.4
o
STO
S1 ,
ST2
C
H
A
N
STO
ST,
5T2
C
A
N
FORMAT A TRACK
MFM 0 1 , 0 1
o a a HOS 051 OSO
N
SC
GPL
D
Command W
W
W
W
W
W
W
W
W
Result
Result
W
W
W
W
W
W
Execution
Command I w
I
W
6-229
AFH-01259C

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