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User Comment
Submitted by Scout on 8 February 2013
Heh, just might as well respond to this, although it is 3 years later ;)
@Skate: this release was part of a tv noise meme on Pouet a few years ago.
It was in no way a size-coding competition.
Besides that, to enable the DTV advantages you have to poke some extra addresses.
You can't avoid suffering those extra bytes, from a size optimizing point of view.
The source code is included in the zip, for educational purposes.
Too bad only a handful of C64 coders explored the DTV.
It's a fun machine to code for. |
User Comment
Submitted by Mr. SID on 20 November 2010
| This is still quite lame, can we have fullscreen all-border TV noise, please? |
User Comment
Submitted by Skate on 20 November 2010
160 bytes for a tv noise is too big for my taste. I don't know anything about DTV and I don't have one to test but if Vice's DTV emulation is accurate, something like this should work.
http://www.akaydin.com/c64/codes/skate/tvnoise96.zip
this 96b version has some glitches but effect is noise after all. ;) |
User Comment
Submitted by tlr on 19 November 2010
Correct, though a bra takes 4 cycles if it crosses a page.
Note that in skip cycle mode a bra takes 2 cycles always, but a jmp takes 3.
In burst mode they take even less dependent on the alignment. |
User Comment
Submitted by daison on 19 November 2010
I think branches and jmp's always use 3 cycles (when actually branching, which both bra and jmp always seem to do).
Correct?
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User Comment
Submitted by Scout on 19 November 2010
@Mace: regarding the cycles, that too.
From the Van Halen JMP lyrics: "Might as well jump".
To be honest, if you can use BRA use it instead of JMP ;)
*guitarsolo* |
User Comment
Submitted by Mace on 19 November 2010
Didn't check, but my guess is that BRA also uses less cycles than JMP.
Van Halen on the other hand, often played JMP when girls started throwing their BRAs at them. |
User Comment
Submitted by Scout on 19 November 2010
BRA lets you jump 127 bytes forward or 128 bytes backward (just like the other branch (BNE, BEQ...) opcodes.
A BRA instruction is also 2 bytes big. A JMP instruction is 3 bytes.
Ideal for size coding :) |
User Comment
Submitted by daison on 19 November 2010
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