PC-3000 Forum

In this Pinout it shows me 2 Times D0 to D7 with different marker 0/1.
What does it mean?
Use 0 or 1 or both? Card has only 8-bit as I know.

Hello.

It's 16-bit chip, there are two lines of bus.

D0-D7 are equal to I/O 0-7

D0-1 - D7-1 are equal to I/O 8-15;

For example:

D5 = I/O 5;

D4 = I/O 4;

D5-1 = 5+8 = I/O 13;

D0-1 = 0+8 = I/O 8;

D7-1 = 7+8 - I/O 15;


But if your card is 8-bit only, then use D0 - D7.

Thanks so much Roman!
I was not sure about it.