Welcome, Guest. Please login or register.

Author Topic: Move16 to chipmem ...  (Read 3374 times)

Description:

0 Members and 1 Guest are viewing this topic.

Offline JoseTopic starter

  • Hero Member
  • *****
  • Join Date: Feb 2002
  • Posts: 2871
    • Show all replies
Move16 to chipmem ...
« on: March 17, 2004, 10:48:12 PM »
I read sometime ago, don't remember where, that one should take special precautions when using the Move16 instruction to chipmem. What are they?
Is there any benefit or the bandwith is not enouph, and maybe that's where the problem is, the processor halting till the instruction is finished (till all bytes are copied) ?
\\"We made Amiga, they {bleep}ed it up\\"
 

Offline JoseTopic starter

  • Hero Member
  • *****
  • Join Date: Feb 2002
  • Posts: 2871
    • Show all replies
Re: Move16 to chipmem ...
« Reply #1 on: March 18, 2004, 07:17:54 PM »
Thx for the info..
With the stuff I've read I think I should've  started coding some stuff earlier ... :-D
\\"We made Amiga, they {bleep}ed it up\\"
 

Offline JoseTopic starter

  • Hero Member
  • *****
  • Join Date: Feb 2002
  • Posts: 2871
    • Show all replies
Re: Move16 to chipmem ...
« Reply #2 on: March 19, 2004, 09:54:41 PM »
knowing only some 68k asm stuff I checked around on what's this rolled/unrolled stuff is...

Woulddn't unrolled be similar to writting all the instructions that would be executed in a loop one after the other, avoiding the condition checking and jumps each time the loop is executed? This occupies a BIG space for some things no?

Ok, what da hell is duff's device by the way? I need to know now :-o  8-)
\\"We made Amiga, they {bleep}ed it up\\"
 

Offline JoseTopic starter

  • Hero Member
  • *****
  • Join Date: Feb 2002
  • Posts: 2871
    • Show all replies
Re: Move16 to chipmem ...
« Reply #3 on: March 19, 2004, 11:29:15 PM »
Cool. I think I got the idea (at least the goal), though I don't udnerstand the code. Maybe later when I also learn C, wich I plan to, but I'm only into asm now!! :-D
So was my idea of unrolled correct?
It's allways cool that you guys are here to talk about this stuff by the way. This is what every long Amiga user should be into  :-)
\\"We made Amiga, they {bleep}ed it up\\"