Page 5 of 6
Posted: Sun Jul 31, 2011 4:30 am
by GARTHWILSON
The most tedious part was hand-converting the program to the bit patterns that had to be set via the switches. Talk about a mistake-prone task...
When I got married, my wife didn't like my dining room furniture and insisted we replace it.
Women never were very good at interior decorating. I can just hear my wife again: "What is that thing in the living room? Can we get rid of it?" 
Posted: Wed Aug 03, 2011 2:51 pm
by RITESH
Here are some pics of my EEPROM programmers......
Posted: Sun Aug 07, 2011 5:25 am
by RITESH
The circuit is being very complex now. because adding so many chip's and i will cure it the counter in series are not working properly
Posted: Sun Aug 07, 2011 12:42 pm
by RITESH
Hello,
After spending so much time I came to know there is some contacting problem arsing between these push buttons.....
when i pull them up the counters move in up ward address, while pushing down they don't count.
i have checked my circuit there is no problem in it, but there is some problem in this white and blue switches, please fig. this out what's that problem....!!
Posted: Tue Aug 09, 2011 4:11 pm
by RITESH
Posted: Tue Aug 09, 2011 5:47 pm
by GARTHWILSON
Ritesh, the forum these pictures are on does not allow access to non-members, so we can't see them.
Edit: You had three empty posts after this, so I deleted them. They had no text or images—totally empty.
Posted: Wed Aug 10, 2011 6:42 pm
by GARTHWILSON
Is there a schematic posted anywhere?
Posted: Thu Aug 11, 2011 2:09 am
by RITESH
No, you can see it data sheet it is very simple...
Posted: Thu Aug 11, 2011 4:06 am
by GARTHWILSON
I mean is there a schematic posted so we can try to help you find out why your counters won't count down, since you wanted help.
Posted: Thu Aug 11, 2011 4:45 am
by RITESH
Sorry, for not getting you exactly.
My counters are working correct but while using these push on/off buttons it count in one direction and other direction count 1 to 2 bits not exactly in order...
pulse _ _Vcc
C up _ _ Count down
_ _
Vcc pulse
_ _ are the terminal of double pole push switches...
Posted: Thu Aug 11, 2011 4:47 am
by RITESH
and you have any idea of 8085 SBC hardware??
Not an 8085 Forum!
Posted: Fri Aug 12, 2011 4:05 pm
by BigDumbDinosaur
and you have any idea of 8085 SBC hardware??
You tried to
start another topic on the 8085, and both BigEd and I have responded. This is a 65xx forum. Please respect that.
Posted: Fri Aug 12, 2011 5:53 pm
by GARTHWILSON
Without my seeing your whole diagram, one possible cause of trouble that comes to mind is that you're using double-pole switches. These definitely will not make contact on the two poles at the same time, and even if they did, there will be bounce (I think you only took care of the bounce problem on one side) and the setup-time requirements on the counters' up/down inputs may not be satisfied. I'm not sure we can spot the problem and give you relevant help without seeing the whole diagram.
I never got into the 8085. The 6502 attracts me for its simple bus structure and the fact that its interrupt performance is much, much better.
Posted: Sat Aug 13, 2011 4:42 am
by RITESH
OK, leave it i will try my self
or use it as it is...
Posted: Sun Aug 14, 2011 1:44 pm
by Nightmaretony
Debounce your switches. Use a cap and reisstor combination, perhaps or a one shot circuit.
