Specifications

EPC-33/34 Hardware Reference
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Parallel Port
The parallel port is located in a user-definable I/O address range (278, 3BC, or 378).
Parallel port interrupts are signaled using IRQ7. Connection to this port is made via
a header connector on the board that is shared with the COM2 serial port. The
parallel port is bi-directional and since it conforms to IEEE 1284-I, the parallel port
supports ECP modes.
Floppy Disk Controller
The floppy disk controller is fully PC-compatible, supporting one or two floppy
drives. It occupies I/O addresses 0x3F2, 0x3F4, 0x3F5, and 0x3F7. It uses bus
interrupt IRQ6 and the 8-bit DMA channel corresponding to DRQ2 and ~DACK2
on the AT-bus. Connection to a floppy disk drive is made via a standard 34-pin
ribbon cable header mounted on the PCB. Power for the drive must be provided
externally. Note that you must use a straight-through cable to drive A (no twist);
drive B gets the twist.
IDE Interface
The IDE hard disk interface is provided by the PicoPower PC/AT chipset. The IDE
hard disk is mapped to I/O addresses 0x1F0 - 0x1F7, 0x3F6, and 0x3F7. Note that
I/O address 0x3F7 is shared with the floppy disk controller as required for PC
compatibility. The IDE hard disk uses AT-bus interrupt IRQ14. Connection to an
IDE hard disk is made through a 44-pin 0.079" [2.0 mm] pitch ribbon cable header
(the standard for 2.5" and 1.8" HDD's) mounted on the PCB. As part of the CPU
chipset, this interface exists on the 486 local bus and can therefore support the
higher throughput requirements of the Enhanced IDE specification. Up to two drives
are supported by the IDE interface including IDE CD-ROM drives. If the onboard
IDE controller is disabled in the Advanced Menu of the BIOS setup, you can use
your own IDE controller card on the AT-bus.