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EPSON Equity 4SX/25,4DX/33, and 4DX2/50
VGA Feature Connector (CN8)
pin 1
‘Yeeaeeeeoeaaw
pin 25
pin 2
’
,feooooooooooo~,
’
pin 26
VGA Feature Connector Pin Assignments
8
IData
I17
1
ENDATA’
I26
1
Not connected
9
1
PCLK
118
1
ENSYNC’
*Active low
logic
DMA Assignments
Level
Assigned device
DMAO
Spare
@-bit)
DMAl Spare
(&bit)
DMA2
FDD controller (&bit)
DMA3
Spare (&bit)
DMAS
Spare
(16~bit)
DMAG
Spare
(16~bit)
DMA7
Spare
(16~bit)
Hardware Interrupts
IRQ
no.
IRQO
IRQl
iRQ3
Function
Timer output
Keyboard
Serial port 2
System I/O Address Map
Hex address
000-OlF
020-03F
040
-
05F
060-06F
070
-
07F
(CMOS)
080-09F
OAO
-
OBF
OCO
-
ODF
OF0
OF1
OF8 - OFF
lFO-
lF8
200
-
207
278
-
27F
280
-
2DF
2El
2E2
and
2E3
2F8
-
2FF
300-31F
1348’357
360-36F
378
-
37F
380-38F
390-393
3A0
-
3AF
3BO
-
3BF
X0-3CF
DCA 3278
PC network
Parallel printer
port
1
SDLC, bisync 2
Cluster
Bisynchronous
1
Monochrome display and printer adapter
Enhanced graphics adapter
Assigned device
DMA controller
1,8237A-5
interrupt controller
1,
8259A, master
Timer, 8254-2
8042 (Keyboard and mouse)
Real-time
clock
NMI
(non-maskable interrupt mask)
DMA page register, 74LS612
interrupt controller 2, 8259A
DMA controller
2,8237A-5
Clear math coprocessor busy
Reset math coprocessor
Math coprocessor
Hard disk
Game
IK)
Parallel printer port 2
Alternate enhanced graphics adapter
GPIB (adapter 0)
Data acquisition (adapter 0)
Serial port 2
Prototype card
1
B90-893
1
EE2
-
EE3
82El
A2El
C2El
E2El
iRQ13
iRQ14
iRQ15
Math coprocessor
HDD controller
Avaiiabie
4/1/93
EPSON Equity-5