Toshiba MK1032GAX manual I/O

CSEL	O	28	If jumper pins B through D are assigned, Drive0/Drive1 setting with this pin is
			valid. When grounded, the drive recognizes itself as a Drive0. When not
			grounded, the drive recognizes itself as a Drive1.
- DMACK	O	29	Responding to DMARQ, this signal indicates that the host is ready to receive or
			send the data.
INTRQ	I	31	Interrupt to the host system, enabled only when the drive is selected and the host
			activates the - IEN bit in the Device Control register. When the - IEN bit is inactive
			or the drive is not selected, this output is in a high impedance state, whether an
			interrupt is set or not.
			The interrupt is set when the IRQ bit is set by the drive CPU. IRQ is reset to zero
			when host reads the Status register or a write to the command register or when
			DRQ is negated.
- IOCS16	I	32	Indication to the host system that the 16 bit data register has been addressed and
			that the drive is ready to send or receive a 16 bit data word (open drain).
DA 1	O	33	Address line from the host system to select the registers of the drive.
- PDIAG	I/O	34	In Drive0/Drive1 mode, this signal reports the presence of Drive1 drive to Drive0
／- CBLID			and enables transmitting of diagnostic result between Drive0 and Drive1
DA 0	O	35	Address line from the host system to select the registers of the drive.
DA 2	O	36	Address line from the host system to select the registers of the drive.
- CS0	O	37	Chip select signal generated from the host address bus. This signal is used to
			select one of the two groups of host accessible registers.
- CS1	O	38	Chip select signal generated from the host address bus. This signal is used to
			select one of the two groups of host accessible registers.
- DASP	I	39	This is a signal from the drive used either to drive an external LED whenever the
			drive is being accessed, or to report presence of the Drive1 to the Drive0 when the
			drive is in Drive0/Drive1 mode.
RESERVED		27,44	Reserved for future use. No connection.
+ 5V		41, 42	5V power line. 41pin and 42pin are connected within the drive.
GROUND		2,19	Ground between the drive and the host system.
		22,24
		26,30
		40,43

(*1) ‘I’ is from the drive to the host system, ‘O’ is from the host system to the drive, and ‘I/O’ is bi-directional.

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