68000 minimal list of opcodes to know

kamelito · 14 September 2013, 18:50

Hi, Is there a minimal list of 68000 opcodes to know available ? I don't know if WinUAE is able to display opcodes used by a given program to build such list if it doesn't exist. That way maybe it can be easier to learn 68000, avoiding learning unecessary opcodes, like Link or others. I remember having posted here a Sega games list but the game was not played. I also found this but it seems pretty low. http://dfsmith.net/Historic/dfsmith/...notes/68000.ps I also found this pretty low number too. http://www.mactech.com/articles/mact...ion/index.html Kamelito

PeterK · 15 September 2013, 10:36

The minimum is 4E75

StingRay · 15 September 2013, 14:10

While PeterK's answer is spot on

here are some more opcodes that you should learn when starting with 68k:

move/moveq
lea
add/sub/mulu/muls/divu/divs
rts

These should get you going I think.

kamelito · 15 September 2013, 15:33

RTS ?
Thanks I already know some of them at least I did back in the day.
I've been watching Photon Hardware programming tutorials (youtube) pretty nice, I'll play around with hardware banging for the fun of it.

Kamelito

StingRay · 15 September 2013, 15:41

Quote:

Originally Posted by kamelito

RTS ?

It's the instruction you definitely need to know to write the shortest possible program, $4e75 mentioned in PeterK's post = rts.

Lonewolf10 · 15 September 2013, 16:32

RTS ($4E75) is the only one I know, because I often use it in the WinUAE debugger to jump out of my subroutines that are either bugged (and heading for crashville if I don't RTS) or stuck in a loop (which I suppose is a bug...

)

modrobert · 17 September 2013, 20:31

Quote:

Originally Posted by kamelito

I've been watching Photon Hardware programming tutorials (youtube) pretty nice, I'll play around with hardware banging for the fun of it.

Yes, thanks for the videos Photon, besides the coding, really liked the (last) DPaint and IFFconv session. Was hypnotized by your line drawing stuff, true talent there.

Joe Maroni · 24 January 2014, 20:15

found this thread and this might be useful for you..

ok, its all binary but not hard to translate them into hex..

http://goldencrystal.free.fr/M68kOpcodes.pdf

kamelito · 28 January 2014, 21:43

Not entirely the same topic but interesting

http://gendev.spritesmind.net/forum/...8aa8b01c6567be

14 September 2013, 18:50	#1
kamelito Zone Friend Join Date: May 2006 Location: France Posts: 1,801	68000 minimal list of opcodes to know Hi, Is there a minimal list of 68000 opcodes to know available ? I don't know if WinUAE is able to display opcodes used by a given program to build such list if it doesn't exist. That way maybe it can be easier to learn 68000, avoiding learning unecessary opcodes, like Link or others. I remember having posted here a Sega games list but the game was not played. I also found this but it seems pretty low. http://dfsmith.net/Historic/dfsmith/...notes/68000.ps I also found this pretty low number too. http://www.mactech.com/articles/mact...ion/index.html Kamelito Last edited by kamelito; 14 September 2013 at 20:05.

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15 September 2013, 10:36	#2
PeterK Registered User Join Date: Apr 2005 Location: digital hell, Germany, after 1984, but worse Posts: 3,377	The minimum is 4E75

15 September 2013, 14:10	#3
StingRay move.l #$c0ff33,throat Join Date: Dec 2005 Location: Berlin/Joymoney Posts: 6,863	While PeterK's answer is spot on here are some more opcodes that you should learn when starting with 68k: move/moveq lea add/sub/mulu/muls/divu/divs rts These should get you going I think.

15 September 2013, 15:33	#4
kamelito Zone Friend Join Date: May 2006 Location: France Posts: 1,801	RTS ? Thanks I already know some of them at least I did back in the day. I've been watching Photon Hardware programming tutorials (youtube) pretty nice, I'll play around with hardware banging for the fun of it. Kamelito

15 September 2013, 16:32	#6
Lonewolf10 AMOS Extensions Developer Join Date: Jun 2007 Location: near Cambridge, UK Age: 44 Posts: 1,924	RTS ($4E75) is the only one I know, because I often use it in the WinUAE debugger to jump out of my subroutines that are either bugged (and heading for crashville if I don't RTS) or stuck in a loop (which I suppose is a bug... )

24 January 2014, 20:15	#8
Joe Maroni Moderator Join Date: Feb 2003 Location: Germany Age: 44 Posts: 1,303	found this thread and this might be useful for you.. ok, its all binary but not hard to translate them into hex.. http://goldencrystal.free.fr/M68kOpcodes.pdf

28 January 2014, 21:43	#9
kamelito Zone Friend Join Date: May 2006 Location: France Posts: 1,801	Not entirely the same topic but interesting http://gendev.spritesmind.net/forum/...8aa8b01c6567be

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