Epson 4SX/25 - Manual (Page 5)

EPSON Equity 4SX/25,4DX/33, and 4DX2/50
VGA Feature Connector (CN8)
pin 1 pin 25
pin 2 pin 26
VGA Feature Connector Pin Assignments
8 Not connected
9 PCLK
*Active low
DMA Assignments
Assigned device
DMAO Spare
Spare
DMA2 FDD controller
DMA3 Spare (&bit)
Spare
Spare
DMA7 Spare
Hardware Interrupts
no.
iRQ3
Function
Timer output
Keyboard
Serial port 2
System I/O Address Map
Hex address
040
070 (CMOS)
OAO OBF
OCO ODF
OF0
OF1
OF8 OFF
200 207
278 27F
2DF
and
2FF
378 37F
3A0 3AF
3BF
DCA 3278
PC network
Parallel printer
1
SDLC, bisync 2
Cluster
Bisynchronous 1
Monochrome display and printer adapter
Enhanced graphics adapter
Assigned device
DMA controller
interrupt controller master
Timer, 8254-2
8042 (Keyboard and mouse)
Real-time (non-maskable interrupt mask)
DMA page register,
interrupt controller 2, 8259A
DMA controller
Clear math coprocessor busy
Reset math coprocessor
Math coprocessor
Hard disk
Game
Parallel printer port 2
Alternate enhanced graphics adapter
(adapter 0)
Data acquisition (adapter 0)
Serial port 2
Prototype card
EE2 EE3
iRQ13
iRQ14 Math coprocessor
HDD controller
Avaiiabie
4/1/93 EPSON Equity-5