EPSON NX
Hardware Interrupts
System l/O Address Map
Hex address’ Aeelgned
device
000-OlF
DMA controller
1,8237A-5
020
-
021
Interrupt controller 1,8259A, master
022
-
024 Epson reserved function
040-043
1
Timer, 8254-2
080-081,084
I8042
(Keyboard and mouse)
070
-
071 (CMOS)
1
Real-time clock
NMI
(non-ma&able interrupt mask)
080-08F
OAO-OAl
OCO
-
ODF
OF0
OF1
OF8
-
OFF
1
lFO-
lF8
200-207
278
-
27A
j
DMA page register,
74LS812
1
Interrupt controller 2,8259A
DMA controller 2,8237A-5
Clear math coprocessor busy
j
Reset math coprocessor
1
Math coprocessor
1
Hard disk drive
IGameWO
1
Parallel printer port 3
I
1280
-
2DF
1
Alternate enhanced graphics adapter
2El
2E2
and
2E3
[
GPIB
(adapter 0)
I
Data aafukition (adapter 0)
I2F8
-
2FF
ISelialport2
I
300-31F
LAN adapter
348-357
DCA 3278
380-383
PC network (low address)
384-387
Resewed
p-368
38C-38F
378
-
37A
1
PC network (high address)
1
Resewed
I
Parallel printer port 2
380-38F
390-393
SDLC, bisync 2
Cluster
3A0
-
3AF
3BO-3BA
I
Bisynchronous 1
I
Monochrome display and printer adapter
3BC-3BE
3C0
-
3CF
3D0
-
3DF
3F0
-
3F7
3F8
-
3FF
8E2
and
8E3
790
-
793
AE2 and AE3
B90-893
EE2
-
EE3
1390
-
1393
Parallel printer port 1
Enhanced graphics adapter
Color/graphics monitor adapter
Floppy disk drfve controller
Serialport
Data acquisttiin (adapter 1)
Cluster (adapter
1)
Data acquisttiin (adapter 2)
Cluster (adapter 2)
J
Data acquisition (adapter 3)
1
Cluster (adapter 3)
Hex address*
22El
1
Asslgned
device
j
GPIB
(adapter 1)
FO80
-
F085
Epson reserved function
F089
-
FO8D
Epson resewed function
*
Recommended addresses for installing devices
Jumper Settings
See the illustration on page 3 for the location of the jumpers
on the main system board.
CPU Speed Jumper Settings*
CPU speed
Jl
J2
53
J4
DW88
A
A
B A
l
Factory settings
CPU Type Jumper Settings’
CPU type J5
J6
57
J6
ODP488DX88
A A
B
B
l
This table shows the factory settings for jumpers
J5-J8.
You need to change
these settings only if you install a future CverDrfve processor.
Other ]umper Settings
JlO
I
A‘
B
Jll
I
A*
Function
Enables the built-in mouse connector
Dtsables the built-in mouse connector
Enables the built-in VGA display adapter
Disables the built-in VGA dlsptay adapter
A color monitor is Installed
A monochrome monitor is installed
Enables a mouse or other polnting device
connected to an opt&n card
Disables a mouse or other pointing device
connected to an option card
Disables the password
Enables the password
Reserved
l
Factory setting
“To use a mouse connected to a port on an option card, set J9 to B and J12 to
A.
lf
you connect another type of pointing device (such as a joy stick) to the
option card port, set both jumpers to A.
EPSON NX-6
6/30/93
(6 pages)
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