Agilent Technologies 35670-90066 manual Dir, Hdsel, SEL0 SEL1, Wdata, Wgate

	Agilent 35670A	Voltages and Signals
		A100 Disk Drive
DIR	Direction — This line sets the direction for the disk head. A high on this line sets the direction
	away from the spindle. A low on this line sets the direction toward the spindle.
DISKINn	Disk In — This line goes low when a flexible disk is inserted in the A100 Disk Drive assembly.
DRIVESELn	Drive Select — A low on this line selects the A100 Disk Drive assembly.
DSKCHGn	Disk Change — This line goes low when a flexible disk is removed from the A100 Disk Drive
	assembly. This line remains low until a flexible disk is installed and STEPn goes low.
HDSEL	Head Select — A low on this line selects the lower disk drive head. A high on this line selects
	the upper disk drive head.
HIDENSn	High Density Select — This line goes low when a high density flexible disk is inserted in the
	A100 Disk Drive assembly.
INDEXn	Index — This line pulses low with each revolution of the flexible disk.
MTRn	Motor On — A low on this line turns on the disk drive motor.
ReDATAn	Read Data — This line pulses low for each bit detected on the flexible disk.
SEL0 - SEL1	Drive Select — When SEL0 and SEL1 are low, the A100 Disk Drive assembly is enabled.
STEPn	Step — A low on this line moves the disk drive head. When STEPn and DIR are low, the head
	moves toward the disk spindle. When STEPn is low and DIR is high, the head moves away
	from the disk spindle.
T00n	Track 00 — This line is low when the head is positioned over track 0 on the flexible disk.
WDATA	Write Data — When WGATE is low, a low pulse on this line writes a bit to
	the disk.
WGATE	Write Gate — When this line is low, information may be written to the A100 Disk Drive
	assembly under control of the WDATA line.
WRIPROTn	Write Protect — This line is low when a write-protected disk is installed in the A100 Disk
	Drive assembly.

9-35