Showing posts with label RAM. Show all posts
Showing posts with label RAM. Show all posts

Sunday, June 24, 2007

Problem in Eden

When trying to do serial IO using Rx interrupts I noticed a design flaw in my schematic. This was the first patch on my PCB which isn't to bad, considering its me =)

I also found one unsoldered ground connection on one of the 6116 SRAMs.

So after extensive testing of the board I am quite convinced that all subsystems are working as expected. During the debug process I have decided that the board needs a few tweaks for the final revision. Nothing major but still......

Tuesday, June 19, 2007

New 6502 based system

The CPU board for the retro system I am working on is coming along just fine. The chip selects for the 6116 SRAMs has been confirmed to work as expected. The control signals for the FLASH memory also works as expected (since the test program can execute =). I have not tested the VIA's or the ACIA yet.

Next step is to port in a monitor software and EhBasic in order to fully verify the functionality of the CPU board.

More to follow......