EPoX Computer EP-6VBA specifications Timer & DMA Channels MAP

Appendix	EP-6VBA
[3B0-3BF]	MONOCHROME & PARALLEL port adapter.
[3C0-3CF]	EGA adapter.
[3D0-3DF]	CGA adapter.
[3F0-3F7]	FLOPPY DISK controller.
[3F8-3FF]	SERIAL port 1.
A-3 TIMER & DMA CHANNELS MAP
TIMER MAP:
TIMER Channel 0	System timer interrupt.
TIMER Channel 1	DRAM REFRESH request.
TIMER Channel 2	SPEAKER tone generator.
DMA CHANNELS:
DMA Channel 0	Available.
DMA Channel 1	Onboard ECP (Option).
DMA Channel 2	FLOPPY DISK (SMC CHIP).
DMA Channel 3	Onboard ECP (default).
DMA Channel 4	Cascade for DMA controller 1.
DMA Channel 5	Available.
DMA Channel 6	Available.
DMA Channel 7	Available

A-4 INTERRUPT MAP

NMI :

Parity check error.

IRQ (H/W):

0System TIMER interrupt from TIMER 0.

1KEYBOARD output buffer full.

2Cascade for IRQ 8-15.

3SERIAL port 2.

4SERIAL port 1.

5PARALLEL port 2.

6FLOPPY DISK (SMC CHIP).

7PARALLEL port 1.

8RTC clock.

9Available.

10Available.

11Available.

A-2