Difference between revisions of "SYMBiFACE II:IDE registers"

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The Symbiface 2 operates the IDE device in 16-bit data transfer mode. 16-bits of data is buffered at a time within the Symbiface 2 and read via the Data port below 8 bits at a time.
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The Symbiface 2 operates the ATA/IDE device in 16-bit data transfer mode. 16-bits of data is buffered at a time within the Symbiface 2 and read/written via the Data port I/O address 8 bits at a time. The device was designed when devices didn't support ATA CFA command set and 8-bit PIO data transfer so this is why it buffers 16-bit of data. (16-bits is the "native" data transfer of an ATA device).
  
 
The I/O ports operate in a "pass-through" like mode where the registers directly reflect those of the connected ATA device.
 
The I/O ports operate in a "pass-through" like mode where the registers directly reflect those of the connected ATA device.
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The [[X-MASS]] is a more modern ATA/IDE device which is compatible with the Symbiface 2 IDE registers and uses the same I/O ports.
  
 
This is the documentation about the '''IDE registers''' of the [[SYMBiFACE II]] expansion card.  
 
This is the documentation about the '''IDE registers''' of the [[SYMBiFACE II]] expansion card.  

Revision as of 12:24, 20 February 2016

The Symbiface 2 operates the ATA/IDE device in 16-bit data transfer mode. 16-bits of data is buffered at a time within the Symbiface 2 and read/written via the Data port I/O address 8 bits at a time. The device was designed when devices didn't support ATA CFA command set and 8-bit PIO data transfer so this is why it buffers 16-bit of data. (16-bits is the "native" data transfer of an ATA device).

The I/O ports operate in a "pass-through" like mode where the registers directly reflect those of the connected ATA device.

The X-MASS is a more modern ATA/IDE device which is compatible with the Symbiface 2 IDE registers and uses the same I/O ports.

This is the documentation about the IDE registers of the SYMBiFACE II expansion card.

Port Read Write
#FD06 Alternate Status Digital Output
#FD07 Drive Address (Not Used)
#FD08 Data Register Data Register
#FD09 Error Register Features Register/(Write Precomp Reg.)
#FD0A Sector Count Sector Count
#FD0B Sector Number Sector Number
#FD0C Cylinder Low Cylinder Low
#FD0D Cylinder High Cylinder High
#FD0E Device/Head Register Device/Head Register
#FD0F Status Register Command Register

See also