Tektronix 4024 |
---|
|
Manufacturer |
Tektronix |
---|
Model |
4024 |
---|
Lifetime |
---|
Introduced |
November, 1977 |
---|
Introductory Price |
$2,995 |
---|
Discontinued |
1982 |
---|
Communication |
---|
Interfaces |
RS-232C, 20 mA current loop |
---|
Baud Rates |
75, 110, 150, 300, 600, 1200, 2400, 4800, 9600 |
---|
Display |
---|
Size |
12-inch |
---|
Phosphor |
P39 green |
---|
Refresh Rate |
60 Hz |
---|
Character Modes |
---|
Resolution |
80x34 |
---|
Matrix |
7x9 |
---|
Cell |
8x14 |
---|
Firmware |
---|
CPU |
Intel 8080 |
---|
RAM |
4 KB to 32 KB |
The Tektronix 4024 terminal was introduced in 1978 at a price of $2,995.[1][2]
Options
Part Number
|
Price
|
Description
|
Option 2
|
$230
|
Current Loop Interface
|
Option 3
|
$300
|
RS-232 Peripheral Interface
|
Option 10
|
$250
|
Polling Interface
|
Option 20
|
$250
|
8 KB Display RAM
|
Option 21
|
$750
|
16 KB Display RAM
|
Option 22
|
$1,750
|
32 KB Display RAM
|
Option 32
|
$150
|
Ruling Characters
|
Option 48
|
No Charge
|
220 Volt Power
|
Memory Map
Start
|
End
|
Description
|
0x0000 |
0x00FF |
Power-Up/Interrupt ROM
|
0x0100 |
0x07FF |
Unused (1792 bytes)
|
0x0800 |
0x0BFF |
I/O Address
|
0x0801 |
Processor-Initiated Reset (Not used.)
|
0x0810 |
Display Memory Status Register
|
0x0811 |
Display Memory VDRIVE Detector Reset
|
0x0820 |
Host Port Status Word
|
0x0822 |
Host Port USART Data Word
|
0x0823 |
Host Port USART Command/Status Word
|
0x0830 |
Keyboard Port Status Word
|
0x0830 |
Keyboard Port Reset Line
|
0x0830 |
Keyboard Port Data Word
|
0x0C00 |
0x0FFF |
Fix-It ROM
|
0x1000 |
0x4FFF |
System Firmware
|
0x5000 |
0x7FFF |
Unused (12 KB)
|
0x8000 |
0xEFFF |
Additional Display Memory
|
0xF000 |
0xFFFF |
Primary Display Memory
|
The boards in the system are connected via a motherboard with 2x36 edge card connectors.
Motherboard Bus Signals
Flip Side
|
Pin
|
Pin
|
Component Side
|
GND |
1- |
-2 |
GND
|
-5V |
3- |
-4 |
-5V
|
SPARE |
5 |
6 |
SPARE
|
-12V |
7- |
-8 |
-12V
|
SPARE |
9 |
10 |
SPARE
|
12V |
11- |
-12 |
12V
|
SPARE |
13 |
14 |
SPARE
|
+5V |
15- |
-16 |
+5V
|
RDIS |
17@ |
18 |
SPARE
|
BA0 |
19# |
#20 |
BA1
|
BA2 |
21# |
#22 |
BA3
|
BA4 |
23# |
#24 |
BA5
|
BA6 |
25# |
#26 |
BA7
|
BA8 |
27# |
#28 |
BA9
|
BA10 |
29# |
#30 |
BA11
|
BA12 |
31# |
#32 |
BA13
|
BA14 |
33# |
#34 |
BA15
|
WACK |
35# |
$36 |
RESET
|
PWDN |
37- |
%38 |
IOADR
|
READ |
39# |
#40 |
WRITE
|
WAIT |
41@ |
@42 |
BRQ
|
BGIN |
43* |
*44 |
BGOUT
|
IA0 |
45% |
%46 |
IA1
|
IA2 |
47% |
@48 |
IRQ
|
LCLK |
49% |
%50 |
HCLK
|
PB0 |
51* |
*52 |
PB1
|
PB2 |
53* |
*54 |
PB3
|
PB4 |
55* |
*56 |
PB5
|
PB6 |
57* |
*58 |
PB7
|
PB8 |
59* |
*60 |
PB9
|
PB10 |
61* |
*62 |
PB11
|
BD0 |
63# |
#64 |
BD1
|
BD2 |
65# |
#66 |
BD3
|
BD4 |
67# |
#68 |
BD5
|
BD6 |
69# |
#70 |
BD7
|
GND |
71- |
-72 |
GND
|
Pin numbers are be annotated with a designation indicating their electrical characteristics as follows:
- |
Power supply pin
|
% |
Pin driven by the processor board with no pull up resistor
|
$ |
Pin driven by the processor board with a pull up through a 2.7K resistor to +4.3V
|
# |
Tri-state pin with a pull up through a 2.7K resistor to +4.3V
|
@ |
Open collector pin with a pull up through a 1K resistor to +4.3V
|
* |
Non-bused signals which are not necessarily the same at every connector.
|
Images
References