Tandy 1000 Technical Reference Manual

Tandy 1000
A.C. CHARACTERISTICS
TIMING RESPONSES
iAPX 88/10
Technical Reference Manual
8088 8088·2
Symbol
Parameter Min. Max. Min. Max. Units Test Conditions
TCLML
Command Active Delay (See
10
35
10 35 ns
Note 1)
TCLMH
Command Inactive Delay (See
10
35
10
35 ns
Note 1)
TRYHSH
READYActive
to Status Passive
110
65
(See Note 3)
ns
TCHSV Status Active Delay
10
110
10
60
ns
TCLSH
Status Inactive Delay
10
130 10 70 ns
TCLAV
Address Valid Delay 10 110 10 60
ns
~
Address Hold Time
10
10 ns
TCLAZ
Address Float Delay
TCLAX
80
TCLAX 50
ns
TSVLH
Status Valid
to ALE High (See
15 15
ns
f--------
Note 1)
TSVMCH
Status Valid to MCE High (See
15
15
ns
Note 1)
TCLLH
CLK
Low to ALE Valid (See
15 15
ns
Note 1)
TCLMCH
CLK
Low to MCE High (See
15 15
ns
Note 1)
TCHLL
ALE Inactive Delay (See Note 1)
15 15 ns
TCLMCL MCE Inactive Delay (See Note 1) 15 15
ns
CL ~ 20·100 pF for
TCLDV
Data Valid Delay 10
110 10 60
ns
all 8088
Outputs
in addition to
TCHDX Data Hold Time 10 10
ns
internal loads
TCVNV
Control Active Delay (See
5
45
5
45
ns
Note 1)
TCVNX
Control Inactive Delay (See
10 45
10
45
ns
Note 1)
TAZRL Address Float to Read Active
0 0
ns
TCLRL
RD Active Delay 10
165
10
100
ns
TCLRH
RD Inactive Delay 10 150
10
80
ns
TRHAV
RD Inactive to Next Address
TCLCL-45 TCLCL-40
Active
ns
TCHDTL
Direction Control Active Delay
50 50
ns
(See
Note 1)
TCHDTH
Direction Control Inactive Delay
30
30
ns
(See Note
1)
TCLGL
GTActive Delay
110
50
ns
TCLGH
GT Inactive Delay
85
50
ns
TRLRH
RDWidth
2TCLCL-75
2TCLCL-50
ns
TOLOH
Output Rise Time
20
20
From 0.8V
to
ns
2.0V
TOHOL
Output Fall Time 12
12
From 2.0V to
ns
0.8V
8
AF~28C

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