Ampro Corporation 700 manual Floppy/Parallel Interface J20

Chapter 3 Hardware

Floppy/Parallel Interface (J20)

The Southbridge (VT82C686B) chip provides the floppy controller and the parallel port controller. The floppy controller and the parallel port controller share the same output connector (J20) on the board and the device selection is made in the BIOS Setup Utility. Refer to Table 4-2 for floppy configurations.

•Floppy Port Controller supports two floppy drives (34-pin & USB), in the standard formats, such as 360k, 720k, 1.2M, 1.44M, or 2.88M drives.

•Parallel Port controller supports standard parallel, Bi-directional, ECP and EPP protocols.

NOTE	Due to the multiplexed nature of the signals for the floppy and parallel ports,
	you can only connect one of these devices at a time. Refer to Chapter 4, BIOS
	Setup later in this manual when selecting the floppy or parallel device in the
	BIOS Setup Utility. A reboot is necessary for a change in the BIOS settings to
	take affect.

The floppy/parallel ports use a 26-pin connector listed in the following table.

Table 3-11. Floppy/Parallel Interface Pin/Signal Descriptions (J20)

Pin #	Signal	Description
1	Strobe*	Strobe* – This is an output signal used to strobe data into the printer. I/O pin
		in ECP/EPP mode.
2	PD0	Parallel Port Data 0 – This pin (0 to 7) provides parallel port data signals.
	INDEX*	Index – Sense detects the head is positioned over the beginning of a track
3	PD1	Parallel Port Data 1 – This pin (0 to 7) provides parallel port data signals.
	TRK0*	Track 0 – Sensing detects the head is positioned over track 0.
4	PD2	Parallel Port Data 2 – This pin (0 to 7) provides parallel port data signals.
	WPRT*	Write Protect – Senses the diskette is write protected.
5	PD3	Parallel Port Data 3 – This pin (0 to 7) provides parallel port data signals.
	RDATA*	Read Data – Raw serial bit stream from the drive for read operations.
6	PD4	Parallel Port Data 4 – This pin (0 to 7) provides parallel port data signals.
	DSKCHG*	Disk Change – Senses the drive door is open or the diskette has been changed
		since the last drive selection.
7	PD5	Parallel Port Data 5 – This pin (0 to 7) provides parallel port data signals.
8	PD6	Parallel Port Data 6 – This pin (0 to 7) provides parallel port data signals.
9	PD7	Parallel Port Data 7 – This pin (0 to 7) provides parallel port data signals.
10	ACK*	Acknowledge * – This is a status output signal from the printer. A Low State
		indicates it has received the data and is ready to accept new data.
	DS1*	Drive Select 1 – Select drive 1.
11	BUSY	Busy – This is a status output signal from the printer. A High State indicates
		the printer is not ready to accept data.
	MTR1*	Motor Control 1 – Select motor on drive 1.
12	PE	Paper End – This is a status output signal from the printer. A High State
		indicates it is out of paper.
	WDATA*	Write Data – Encoded data to the drive for write operations.

ReadyBoard 700 Reference Manual 37