System i/o address map, Connector pin assignments – Epson ACTIONTOWER 7000 User Manual
Page 8
EPSON ActionPC 7000, ActionTower 7000, Endeavor 486i
System I/O Address Map
Serial port connector pin assignments (J4 and J5)
Pin
Signal
Pin
Signal
1
Data carrier detect
6
Data set ready
2
Receive data
7
Request to send
3
Transmit data
8
Clear to send
4
Data terminal ready
9
Ring indicator
Hex address
000-01F
020-03F
Assigned device
DMA controller 1, 8237
Interrupt controller 1, 8259
022-024
Reserved
Ground
I
I
040-05F
060-06F
070-07F
Timer, 8254
Keyboard controller, 8242PE
Real-time clock NMI (non-maskable Interrupt)
Keyboard and mouse connector pin assignments (J1 and J3)
080-09F
DMA page register, 74LS612
Pin
Signal
Pin
Signal
1
Data
4
V c c
2
N C
5
Clock
3
Ground
6
N C
0A0-0BF
0C0-0DF
0F0
Interrupt controller 2, 8259
DMA controller 2, 8237
Clear math coprocessor
OF1
Reset math coprocessor
VGA port connector pin assignments (J7)
0F8-0FF
1F0-1F8
1E0-1E7
Math coprocessor
Primary hard disk Interface
Secondary hard disk Interface
200-207
Game I/O
278- 27F
2B0-2DF
2E1
Parallel printer port 2
Alternate enhanced graphics adapter
GPIB (adapter 0)
2E2, 2E3
Data acquisition (adapter 0)
2F8-2FF
300-31F
360-363
Serial port 2
Prototype card
Available
LED connector pin assignments (J21)
Pin
Signal
Pin
Signal
1
N C
11
Power LED (yellow)
2
Turbo LED (yellow)
12
N C
3
Turbo LED (white)
13
Power LED (white)
368-36B
Available
378-37F
380-38F
390-393
Parallel printer port 1
Available
Available
4
N C
5
N C
6
N C
7
N C
8
NC
14
N C
15
N C
16
N C
17
Speaker (red)
18
NC
3A0-3AF
Available
3B0-3BF
3C0-3CF
3D0-3DF
Available
Available
Available
3F0-3F7
Diskette drive controller
9
Hardware reset (white)
HDD LED connector pin assignments (J15)
3F8 -3FF
6E2, 6E3
790- 793
Serial port 1
Available
Available
AE2, AE3
Available
B90, B93
EE2, EE3
1390-1393
Available
Available
Available
Pin
Signal
1
Red
Pin
Signal
22E1
Available
Power
supply
connector pin assignments (J9)
2390-2393
42E1
63E1
Available
Available
Available
82E1
Available
A2E1
C2E1
E2E1
Available
Available
Available
Diskette
connector pin
Connector Pin Assignments
Pin* Signal
2
NC
Parallel port connector pin assignments (J6)
4
N C
6
N C
8
Index
10
Motor A
12
Drive B
14
Drive A
16
Motor B
18
Direction
22
Write data
24
Write enable
26
Track 0
28
Write protect
30
Read data
32
Select header 0
34
Disk change
6
Data 4
15
Error *
24
Signal ground
7
Data 5
16
lnit *
25
Signal ground
8
Data 6
17
Selectin *
9
Data 7
18
Signal around
*
All odd-numbered pins are grounds
* Active low logic
8 - ActionPC 7000, ActionTower 7000, Endeavor 486i 5/19/95