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Search: Posts Made By: meynaf
Forum: Coders. Tutorials 09 December 2018, 11:13
Replies: 111
Views: 29,686
Posted By meynaf
Why not the obvious : moveq #3,d0 and.w...

Why not the obvious :

moveq #3,d0
and.w data,d0
bne label
Forum: Coders. Tutorials 08 December 2018, 12:19
Replies: 111
Views: 29,686
Posted By meynaf
Tell that to people who got happy with my game...

Tell that to people who got happy with my game ports :cheese
Forum: Coders. Tutorials 08 December 2018, 11:39
Replies: 111
Views: 29,686
Posted By meynaf
Well, it's a real pain to disassemble (and to...

Well, it's a real pain to disassemble (and to debug).
This program (http://eab.abime.net/showthread.php?t=95240) was just full of this and if i could kick the author's ass i'd have done it. :mad
Forum: Coders. Tutorials 07 December 2018, 10:18
Replies: 111
Views: 29,686
Posted By meynaf
On 68020+ there is a barrel shifter so ROL/ROR...

On 68020+ there is a barrel shifter so ROL/ROR timing is no longer a problem. Having added an extra instruction for byte swapping in words would have led to duplicates.
Forum: Coders. Tutorials 06 December 2018, 22:52
Replies: 111
Views: 29,686
Posted By meynaf
There are faster ways to do that (for 68000).

There are faster ways to do that (for 68000).
Forum: Coders. Tutorials 06 December 2018, 20:41
Replies: 111
Views: 29,686
Posted By meynaf
You haven't coded on Windows to say that !

You haven't coded on Windows to say that !
Forum: Coders. Tutorials 02 December 2018, 11:49
Replies: 111
Views: 29,686
Posted By meynaf
Mixing direct hardware access with OS code is...

Mixing direct hardware access with OS code is calling for trouble, and you've just got it...
Forum: Coders. Tutorials 02 December 2018, 11:47
Replies: 111
Views: 29,686
Posted By meynaf
Or, with an even greater chance of success (due...

Or, with an even greater chance of success (due A2 not being trashed, as trashing registers is quite bad upon exiting an interrupt) :

move.l level2_vector,-(a7)
rts

Sorry i just couldn't...
Forum: Coders. Tutorials 01 December 2018, 14:17
Replies: 111
Views: 29,686
Posted By meynaf
Rather than Forbid(), try Disable(). Interrupts...

Rather than Forbid(), try Disable(). Interrupts may read the port and so your code won't get anything meaningful out of it.
Forum: Coders. Tutorials 01 December 2018, 12:43
Replies: 111
Views: 29,686
Posted By meynaf
A full screen program still needs a window,...

A full screen program still needs a window, exactly like a directx windows program in full screen mode, or even a sdl program.
You need to first setup the screen (I use OpenScreenTagList for that),...
Forum: Coders. Tutorials 01 December 2018, 10:18
Replies: 111
Views: 29,686
Posted By meynaf
You can either : - use input.device, - kill...

You can either :
- use input.device,
- kill the OS and peek keyboard directly.

But i am not sure if accessing the kbd at a low level is a good idea.



It's not missing, it's just to be...
Forum: Coders. Tutorials 30 November 2018, 20:21
Replies: 111
Views: 29,686
Posted By meynaf
Call this a failed theory if you want, but the...

Call this a failed theory if you want, but the carry on the 68k has been made so that the flag for testing isn't the same as for multi-precision.
Therefore any data move will change C (usually...
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