Specifications

Appendix A - Chip Set & I/O Map
Page A-3
A A
Serial I/O (COM2:) Port:
SMC FDC37C665 emulates 8250 of PC/AT
I/O Addr Functional group Usage
2F8 COM2: serial port Receiver/transmitter buffer
Baud rate divisor latch (LSB)
2F9 Interrupt enable register
Baud rate divisor latch (MSB)
2FA Interrupt ID register
2FB Line control register
2FC Modem control register
2FD Line status register
2FE Modem status register
Super I/O Controller:
SMC FDC37C665
I/O Addr Functional group Usage
3F0, 3F1 Super I/O Controller Configuration
Floppy disk drive controller :
SMC FDC37C665
I/O Addr Functional group Usage
3F2 Floppy disk controller Digital output register
3F4 Main status register
3F5 Data, status 0-3 registers
3F7 Data rate / digital in registers
Parallel I/O (LPT1 :) Port:
SMC FDC37C665
I/O Addr Functional group Usage
378 LPT1: parallel port Data port
379 Status port
37A Control port
37B EPP address port
37C EPP data port 0
37D EPP data port 1
37E EPP data port 2
37F EPP data port 3
778 Parallel port FIFO
Configuration register A
779 Configuration register B
77A Extended control register