Specifications

I/O Map
F0 Coprocessor Clear coprocessor busy
F1 Reset coprocessor
Port Functional group Usage
BB
1F0 IDE disk controller Data register
1F1 Error / write precompensation
1F2 Sector count
1F3 Sector number
1F4 Cylinder low register
1F5 Cylinder high register
1F6 SDH register
1F7 Status/command register
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
340 SCSI controller Sequence control register
341 Transfer control 0 register
342 Transfer control 1 register
343 Signal out register
344 Rate control register
345 Selection/reselection ID register
346 Latched data register
347 Data bus register
348 Count 0 register
349 Count 1 register
34A Count 2 register
34B Interrupt status 0 register
34C Status 1 register
34D Status 2 register
34E Status 3 register
34F Status 4 register
350 Interrupt mode 0 register
351 Interrupt mode 1 register
352 DMA control 0 register
353 DMA control 1 register
354 DMA status register
355 FIFO status register
356 Data port register
358 Burst control register
35A Port A register
35B Port B register
35C Revision register
35D Stack register
35E Test register
Port Functional group Usage
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