Lenovo NetVista A40 (Danish) User guide - Page 89

Tabel 2. I/O-adresser (fortsat) Adresse (hexværdi) Størrelse (byte) Beskrivelse 03F0 - 03F5 6 Diskette channel 1 03F6 1 Primary IDE channel command port 03F7 (Write) 1 Diskette channel 1 command 03F7, bit 7 1 bit Diskette disk change channel 03F7, bits 6:0 7 bits Primary IDE channel status port 03F8 - 03FF 8 COM1 0400 - 047F 128 Available 0480 - 048F 16 DMA channel high page registers 0490 - 0CF7 1912 Available 0CF8 - 0CFB 4 PCI configuration address register 0CFC - 0CFF 4 PCI configuration data register LPTn + 400h 8 ECP port, LPTn base address + hex 400 OCF9 1 Turbo and reset control register 0D00 - FFFF 62207 Available DMA I/O-adresser Tabellen nedenfor viser, hvilke ressourcer der er tilknyttet DMA-adresserne. Adresser, der ikke er vist, er reserveret. Tabel 3. DMA I/O-adresser Adresse Beskrivelse Bit (hex-værdi) 0000 Channel 0, memory address register 00 - 15 0001 Channel 0, transfer count register 00 - 15 0002 Channel 1, memory address register 00 - 15 0003 Channel 1, transfer count register 00 - 15 0004 Channel 2, memory address register 00 - 15 0005 Channel 2, transfer count register 00 - 15 0006 Channel 3, memory address register 00 - 15 0007 Channel 3, transfer count register 00 - 15 0008 Channels 0-3, read status/write command register 00 - 07 0009 Channels 0-3, write request register 00 - 02 000A Channels 0-3, write single mas register bits 00 - 02 000B Channels 0-3, mode register (write) 00 - 07 000C Channels 0-3, clear byte pointer (write) A 000D Channels 0-3, master clear (write)/temp (read) 00 - 07 000E Channels 0-3, clear mask register (write) 00 - 03 000F Channels 0-3, write all mask register bits 00 - 03 0081 Channel 2, page table address register 00 - 07 0082 Channel 3, page table address register 00 - 07 Bytepointer Ja Ja Ja Ja Ja Ja Ja Ja Tillæg D. Oversigt over systemadresser 79