Epson Equity II Product Manual page 3

Multifunction Board
Multifunction Board
Jumper
2 3 4 5 6 -
A
B
A A
A B
B A
B B
AA A
A
B-
I/O Port Addresses
Address
DMA Controller 1
020 - 03F Interrupt Controller 1
040 - 05F
Timer/Counter
060 - 06F
Keyboard controller and Port B
070 -07F CMOS RAM and Non - Maskable Interrupt Mask
OAO - OBF Interrupt Controller 2
OCO -0DF DMA Controller 2
Hard Disk Controller
278 - 27F
Parallel Port 1
378 - 37F
Parallel Port 0
3B0 -3BF Parallel Port 2 (on some video boards)
3F0 - 3F7 Floppy Disk Controller
Equity Series Computers
9
* Primary register set of FDC
Secondary register set of FDC
* Enable FDC register set
Disable FDC register set
A
B Secondary paralle,l I/F, IRQ5
Video adapter parallel I/F. IRQ7
A
Disable parallel I/F
B Secondary serial I/F, IRQ3
Disable serial I/F
Function
1 2 / 1 2 / 8 8
DMA Channels
Channel
Function
Hardware Interrupts
EQUITY II+ (12 MHz)
Function
Spare
Spare
Floppy disk transfers
Spare (Hard disk drive)
Cascade of data from channel 0 -3
Spare
Spare
Spare
FUNCTION
Timer Output 0
Keyboard
Interrupt from CTLRP
Serial port 2
Serial port 1
Parallel port 2
Floppy disk interrupt
Parallel port 1
RTC interrupt
Software redirected to IRQ2
Reserved
Reserved
Reserved
Coprocessor
Hard disk controller
Reserved
E Q l l + - 3