Tandy 1000 Technical Reference Manual

Tandy 1000
Technical Reference Manual
iAPX 88/10
WAVEFORMS
(Continued)
WRITE CYCLE
51.S!, so (EXCEPT HALT)
BUS TIMING-MAXIMUM
MODE SYSTEM
(USING 8288)
AO,-AO
o
MWTC DR lowe
AMWC OR AIOWC
~~I
"""''''j
1-)
I_TCLMH
,'-----
A'5-
A
e RESERVED FOR
(SEE NOTES J,4}
CASCADEADOR
.,: // f.- TDVel-
-~I ~~~~)t-t -=~C
TSVMCH~r!~-// \ r--
~_ --TCHD~--------I--+-----+-_/
~
\'----T----~-+-_T
. I
--+----~- ~
\( ..,
-:\ I--TCVNV
I
M_~
POEN
OT/R
8288CXJTPUTS ,
SEE NOTES 5,6 INTA
- ~I
SOFTWARE
HALT -(DEN = vOl;Ab,QlrnC,IOlfC,MWTC . .urwc.Towe,AJOWC.INfA.DTIA '" VOH
: ~----
TCLAV~ I--
~ j'----------,-' -- -- ---
\~---~ \_-----
1, :~~C~~;;lS SWITCH BETWEEN VOH AND VOL UNLESS OTHERWISE
2. ROY IS SAMPLED NEAR THE END OF T2. T]. Tw TO DETERMINE IF Tw
MACHINES STATES ARE TO BE INSERTED
J ~~~~:~E AODRESS IS VAUO BETWEEN FIRST AND SECOND INT'"
4. TWO INT'" CYCLES RUN BACK· TO· BACK. THE 8086 LOCAL AOOR/DATA
BUS
IS FLOATING DURING BOTH INTA CYCLES. CONTROL FOR
POINTER ADDRESS IS SHOWN FOR SECOND INTA CYCLE
5. SIGNALS AT 8284 OR 8288 ARE SHOWN FOR REFERENCE ONLY
6. THE ISSUANCE OF THE 8288 COMMAND AND CONTROl SIGNALS
(UlmC, UWTC,,(MWC, roJft,IOWr:,~, TNTA AND DEN) LAGS THE
ACTIVE HIGH 8288 CEN
7. ~~~~~MING MEASUREMENTS ARE MADE AT 1.5V UNLESS OTHERWISE
8. STATUS INACTIVE IN STATE JUST PRIOR TO T
4
•
10
AFN-00826C

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