Epson Equity 4 Manual de información del producto - Página 5
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VGA Feature Connector (CN8)
pin 1
pin 2 '
VGA Feature Connector Pin Assignments
8
9
*Active low logic
DMA Assignments
Assigned device
DMAO
Spare @-bit)
Spare (&bit)
DMA2
FDD controller (&bit)
DMA3
Spare (&bit)
Spare (16~bit)
Spare (16~bit)
DMA7
Spare (16~bit)
Hardware Interrupts
Function
Timer output
Keyboard
iRQ3
Serial port 2
iRQ13
Math coprocessor
iRQ14
HDD controller
Avaiiabie
EPSON Equity 4SX/25,4DX/33, and 4DX2/50
System I/O Address Map
Hex address
pin 25
040 - 05F
070 - 07F (CMOS)
OAO - OBF
OCO - ODF
OF0
OF1
OF8 - OFF
200 - 207
278 - 27F
378 - 37F
3A0 - 3AF
4/1/93
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
Data acquisition (adapter 0)
Serial port 2
Prototype card
DCA 3278
PC network
Parallel printer port 1
SDLC, bisync 2
Cluster
Bisynchronous 1
Monochrome display and printer adapter
Enhanced graphics adapter
EPSON Equity-5