Search found 54 matches
- Mon Mar 25, 2013 9:40 pm
- Forum: Development
- Topic: timing interrupt routine
- Replies: 10
- Views: 4030
Re: timing interrupt routine
What is the physical address of "FRAMES"?
- Mon Mar 25, 2013 12:17 pm
- Forum: Development
- Topic: timing interrupt routine
- Replies: 10
- Views: 4030
Re: timing interrupt routine
ok, that is a lot more than I initially thought . I found a clock program, I think it will use the same trick so I will disassemble that and see what is exactly there. Is there any way to do a smart kind of disassembling of some machine code in a REM statement?
- Mon Mar 25, 2013 4:06 am
- Forum: Development
- Topic: timing interrupt routine
- Replies: 10
- Views: 4030
Re: timing interrupt routine
I think I found the answer already. If I understand correctly, the IX register contains an interrupt vector that will be called 50 or 60 times per second. By changing this vector to my own routine and ending with a jump to the original vector that should then exactly do what I want. Is it that simpl...
- Mon Mar 25, 2013 3:41 am
- Forum: Development
- Topic: timing interrupt routine
- Replies: 10
- Views: 4030
timing interrupt routine
Hi All, I cleaned out the garage last weekend and bumped into my good old ZX81! I couldn't dare to throw it out so I thought maybe I can use it for "something", not sure yet what to use it for though! The problem I ran into long time ago is that I couldn't figure out how to get an interrupt at const...