EPoX Computer EP-3VWM specifications Timer & DMA Channels MAP

Appendix		EP-3VWM
[2F8-2FF]		SERIAL port 2.
[360-36F]		NETWORK ports.
[378-37F]		PARALLEL port 1.
[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.

1 KEYBOARD output buffer full.

2 Cascade for IRQ 8-15.

3 SERIAL port 2.

4 SERIAL port 1.

5 PARALLEL port 2.

A-2