Ampro Corporation LITTLE BOARD 5001451A - Manual (Page 38)

2-20
The ROM-BIOS scans I/O addresses for parallel ports in the following order: 3BCh, 378h, 278h.
DMA Channels
In ECP enhancement mode, the parallel port can send and receive data under control of an on-
board DMA controller. On the Little Board P6d module, select a DMA channel in Setup. You can
configure the parallel port to use either DMA channel 1 or DMA channel 3. If you will not be using
DMA with the parallel port, leave it disabled. This makes the DMA channel available to other
peripherals installed on the expansion buses.
Parallel Port Connector (J9)
The parallel port appears on J9. Its pinout is arranged so that a 26-pin ribbon cable can be directly
connected to a 25-pin DB-25 connector to match the PC standard pinout.
Table 2-20 gives the connector pinout and signal definitions for the parallel port. In addition, the
table indicates the pins to which each signal must be wired for compatibility with a standard DB25
connector. Normally the PC parallel port uses a female “DB“ connector.