Thread Starter

keiichicom

Joined Apr 26, 2022
74
Hi, I think that this looks correct, please confirm. I am ONLY showing my connection to the 62256 32k x 8 ram CE pin that I added to the web page picture, slide 15: When A13,A14,A15 are all low, the 2764 should be selected. When A15 is high, the 62256 should be selected.

8085 2764A 62256.png

Keiichicom
 

ericgibbs

Joined Jan 29, 2010
18,865
hi k,
I see that you are using a 32K byte RAM. ie: A0 thru A14 address lines, so why the decode on A13/A14.

Use A15 as ROM / RAM select.
E

Edit: do you have a complete circuit diagram to post, we can then give more defined help.?
EG57_ 668.png
 
Last edited:
Top