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Forums > C64 Coding > Safe zeropage addresses
2008-04-21 12:30
Shadow
Account closed

Registered: Apr 2002
Posts: 355
Safe zeropage addresses

Which zeropage addresses are safe for use?
I've checked through a C64-memory map, and it seems like most zeropage locations with the exception of $00 and $01 are mostly for BASIC stuff, meaning that they should be OK when coding demos that doesn't use ase any BASIC or Kernel stuff?

 
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2008-04-22 06:58
Cruzer

Registered: Dec 2001
Posts: 1048
The ideal music player should be configurable so you could set parameters like how many zp-adrs it can use, whether it should be optimized for cycle or memory consumption, whether it's the max or average rastertime that counts, etc. and then it should generate the player based on these criteria. Just an idea for next version, Jeff! ;)
2008-04-22 07:15
Zyron

Registered: Jan 2002
Posts: 2381
It should also create the music by itself, automagically. :)
2008-04-22 07:24
HCL

Registered: Feb 2003
Posts: 716
Ahh, you're f**kedup, and you know it. This is the kind of stuff that is really motivating for the composers.. Cryptic, meaningless settings that doesn't affect the sound of your music at all. I guess *every* musician would start to fiddle with the ZeroPage-ramp and the Optimize-button at once, yeah right.. ;)
2008-04-22 07:39
Dane
Account closed

Registered: May 2002
Posts: 421
Quote: The ideal music player should be configurable so you could set parameters like how many zp-adrs it can use, whether it should be optimized for cycle or memory consumption, whether it's the max or average rastertime that counts, etc. and then it should generate the player based on these criteria. Just an idea for next version, Jeff! ;)


This pretty much describes my relationship with HCL
2008-04-22 09:09
Quetzal

Registered: Jul 2002
Posts: 71
Quote: @Oswald: registers are just like girls. you can load them as much as you want but you will still miss another one ;) tax, tay, tya, txa are all lesbians...

lax = two at same time?!
2008-04-22 10:32
Skate

Registered: Jul 2003
Posts: 490
this explains why lax is illegal ;)
2008-04-22 11:38
Mace

Registered: May 2002
Posts: 1799
Quote:
This pretty much describes my relationship with HCL
LOL! :-D
2008-04-22 15:40
Frantic

Registered: Mar 2003
Posts: 1627
Well, the 6510 never gets closer to sex than SAX, so don't worry.
2008-04-22 16:19
Cruzer

Registered: Dec 2001
Posts: 1048
How about:

sec
sec

Get it? SECs ;D And it's not even illegal 0:)
2008-04-22 17:23
Frantic

Registered: Mar 2003
Posts: 1627
Sure, but this just proves the point. Two SECs in a row is just so unnatural to the 6510. It is never used.
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