RadiSys EPC - 6A Hardware Reference Manual page 28

Port Functional group
8A
8B
8F
A0 Interrupt controller 2
Port Functional group
A1
C0 DMA
C2
C4
C6
C8
CA
CC
CE
D0
D2
D4
D6
D8
DA
DC
DE
F0 Coprocessor
F1
2F8 COM2 serial port
2F9
2FA
2FB
2FC
2FD
2FE
378 LPT1 parallel port
379
37A
3F8 COM1 serial port
3F9
3FA
3FB
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Chapter 4: Programming Interface
Usage
Channel 7 page register
Channel 5 page register
Refresh page register
Port 0
Usage
Port 1
Channel 4 address
Channel 4 count
Channel 5 address
Channel 5 count
Channel 6 address
Channel 6 count
Channel 7 address
Channel 7 count
Command/status
DMA request
Command register (R)
Single-bit DMA req mask(W)
Mode
Set byte pointer (R)
Clear byte pointer (W)
Temporary register (R)
Master clear (W)
Clear mode reg counter (R)
Clear all DMA req mask (W)
All DMA request mask
Clear coprocessor busy
Reset coprocessor
Receiver/transmitter buffer
Baud rate divisor latch (LSB)
Interrupt enable register
Baud rate divisor latch (MSB)
Interrupt ID register
Line control register
Modem control register
Line status register
Modem status register
Printer data register
Printer status register
Printer control register
Receiver/transmitter buffer
Baud rate divisor latch (LSB)
Interrupt enable register
Baud rate divisor latch (MSB)
Interrupt ID register
Line control register
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