Lenovo PC 300PL Techical Information Manual - Page 46

Appendix B. System address maps Figure 36 (Page 3 of 3). I/O address map Address (Hex) Size 0490-0CF7 1912 bytes 0CF8-0CFB 4 bytes 0CFC-0CFF 4 bytes LPTn + 400h 8 bytes 0CF9 1 byte 0D00-FFFF 62207 bytes Description Available PCI Configuration address register PCI Configuration data register ECP port, LPTn base address + hex 400 Turbo and reset control register Available DMA I/O address map The following figure lists resource assignments for the DMA address map. Any addresses that are not shown are reserved. Figure 37 (Page 1 of 2). DMA I/O address map Address (hex) Description 0000 Channel 0, Memory Address register 0001 Channel 0, Transfer Count register 0002 Channel 1, Memory Address register 0003 Channel 1, Transfer Count register 0004 Channel 2, Memory Address register 0005 Channel 2, Transfer Count register 0006 Channel 3, Memory Address register 0007 Channel 3, Transfer Count register 0008 Channels 0-3, Read Status/Write Command register 0009 Channels 0-3, Write Request register 000A Channels 0-3, Write Single Mask register bits 000B Channels 0-3, Mode register (write) 000C Channels 0-3, Clear byte pointer (write) 000D Channels 0-3, Master clear (write)/temp (read) 000E Channels 0-3, Clear Mask register (write) 000F Channels 0-3, Write All Mask register bits 0081 Channel 2, Page Table Address register 2 0082 Channel 3, Page Table Address register 2 0083 Channel 1, Page Table Address register 2 0087 Channel 0, Page Table Address register 2 0089 Channel 6, Page Table Address register 2 008A Channel 7, Page Table Address register 2 008B Channel 5, Page Table Address register 2 008F Channel 4, Page Table Address/Refresh register 00C0 Channel 4, Memory Address register 00C2 Channel 4, Transfer Count register 00C4 Channel 5, Memory Address register 00C6 Channel 5, Transfer Count register 00C8 Channel 6, Memory Address register Bits 00-15 00-15 00-15 00-15 00-15 00-15 00-15 00-15 00-07 00-02 00-02 00-07 N/A 00-07 00-03 00-03 00-07 00-07 00-07 00-07 00-07 00-07 00-07 00-07 00-15 00-15 00-15 00-15 00-15 Byte pointer Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 38 Technical Information Manual