Specifications

EPC-3305 Hardware Reference
70
x2FC R/W Modem control register
x2FD R Line status register
x2FE R/W Modem status register
Table A-22. Serial I/O (COM 2) port
I/O Addr Functional group R/W Usage
Table A-23. Secondary IDE
I/O Addr Functional group R/W Usage
0374 Secondary IDE Reserved
0375 Reserved
0376 R/W Alt status/device control
Table A-24. Parallel I/O (LPT1) port
I/O Addr Functional group R/W Usage
x378 LPT1 parallel port R/W Printer data register
x379 R
W
Printer status register
Printer status register (EPP only)
x37A R/W Printer control register
Table A-25. EPP port
I/O Addr Functional group R/W Usage
x37B EPP R/W EPP address port
x37C R/W EPP data port 0
x37D R/W EPP data port 1
x37E R/W EPP data port 2
x37F R/W EPP data port 3
Table A-26. VGA controller
I/O Addr Functional group R/W Usage
x3B4 VGA controller R/W CRT controller index (mono)
x3B5 R/W CRT controller data (mono)
x3BA R
W
Input status register 1 (mono)
Feature control output (mono)
Table A-27. EGA controller
I/O Addr Functional group R/W Usage
x3C0 EGA controller W Attribute controller index/data
x3C1 R Attribute controller index/data
x3C2 R
W
Input status register 0
Miscellaneous output
x3C3 R/W Motherboard sleep