Ampro Corporation Single Board Computer 700 - Manual (Page 43)

Chapter 3 Hardware
ReadyBoard 700 Reference Manual 37
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
INDEX*
Parallel Port Data 0 – This pin (0 to 7) provides parallel port data signals.
Index – Sense detects the head is positioned over the beginning of a track
3 PD1
TRK0*
Parallel Port Data 1 – This pin (0 to 7) provides parallel port data signals.
Track 0 – Sensing detects the head is positioned over track 0.
4 PD2
WPRT*
Parallel Port Data 2 – This pin (0 to 7) provides parallel port data signals.
Write Protect – Senses the diskette is write protected.
5 PD3
RDATA*
Parallel Port Data 3 – This pin (0 to 7) provides parallel port data signals.
Read Data – Raw serial bit stream from the drive for read operations.
6 PD4
DSKCHG*
Parallel Port Data 4 – This pin (0 to 7) provides parallel port data signals.
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*
DS1*
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.
Drive Select 1 – Select drive 1.
11 BUSY
MTR1*
Busy – This is a status output signal from the printer. A High State indicates
the printer is not ready to accept data.
Motor Control 1 – Select motor on drive 1.
12 PE
WDATA*
Paper End – This is a status output signal from the printer. A High State
indicates it is out of paper.
Write Data – Encoded data to the drive for write operations.