EPOX EP-3VCA2 Specifications download pdf (Page 54)

Appendix EP-3VCA2

A-2

[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):

0 System 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.

1 2 ... 49 50 51 52 53 54 55 56 57 58 59 ... 70 71

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EPOX EP-3VCA2 Specifications Page 54