Seagate ST612712DEG, ST680712DEG, ST610712DEG, ST660712DEG manual Iord

Table 8:	35-way ZIF (IDE interface) connector signals
		I/O Read
22	IORD-	DMA ready during Ultra DMA data-in bursts
		DMA strobe during Ultra DMA data-out bursts
23	CS1-	Chip select 1
24	CS0-	Chip select 0
25	D15	Data bus bit 15
26	D07	Data bus bit 07
27	D14	Data bus bit 14
28	D06	Data bus bit 06
29	D13	Data bus bit 13
30	D05	Data bus bit 05
31	D12	Data bus bit 12
32	D04	Data bus bit 04
33	D11	Data bus bit 11
34	D03	Data bus bit 03
35	GND	Ground

Note. For ST1.3 Series, drive is operating in master-mode only, and the DASP# (Drive Active/Slave Present) that is commonly used to drive LED light to indicate drive activity is not available.

26 ST1.3 Series Product Manual, Rev. C