WinUae 68k emulation question.

Thorham · 29 June 2009, 22:04

Hi guys,

I was wondering how easy/difficult it would be to get WinUae's 68k emulation to work as a stand alone program. I'm just asking out of curiosity, because some people on the Easy68k site want '020 support for Easy68k.

Perhaps Toni could offer some pointers, so that I can pass them on to the Easy68k forum. The guy who made the Easy68k package is a professor who teaches 68000, amongst other things, and he's going to try to get some of his students to get the Uae 68k emulation to work in Easy68k. That's why I'm asking.

Thank you

Rabbit80 · 29 June 2009, 22:10

Wasn't this already done in one of the Atari emulators?

alexh · 30 June 2009, 09:53

WinUAE's 68k core has been used in several other programs including UADE & Hatari

Toni Wilen · 30 June 2009, 11:08

I don't know, I have never needed to have separate 680x0 emulation..

It shouldn't be too difficult. 99% of emulation code is in single big .c-file which is autogenerated by gencpu.c. This file includes all 680x0 instructions and can be configured (without recompiling) to any UAE supported CPU model. (not including 68000 prefetch and cycle-exact modes that have separate big .c-file)

Model selection then simply configures 16-bit jump table (one for each possible instruction opcode). Empty slot = unknown instruction/not supported by current configured CPU, select correct exception, filled slot = pointer to instruction emulation code.

Very simple

Note that UAE/WinUAE sources do not come with those big .c-files. They need to be regenerated by running gencpu.

Thorham · 01 July 2009, 21:37

Quote:

Originally Posted by Rabbit80

Wasn't this already done in one of the Atari emulators?

I have no idea

Quote:

Originally Posted by alexh

WinUAE's 68k core has been used in several other programs including UADE & Hatari

Nice to know it's been done before

Quote:

Originally Posted by Toni Wilen

I don't know, I have never needed to have separate 680x0 emulation..

It shouldn't be too difficult. 99% of emulation code is in single big .c-file which is autogenerated by gencpu.c. This file includes all 680x0 instructions and can be configured (without recompiling) to any UAE supported CPU model. (not including 68000 prefetch and cycle-exact modes that have separate big .c-file)

Model selection then simply configures 16-bit jump table (one for each possible instruction opcode). Empty slot = unknown instruction/not supported by current configured CPU, select correct exception, filled slot = pointer to instruction emulation code.

Very simple

Note that UAE/WinUAE sources do not come with those big .c-files. They need to be regenerated by running gencpu.

Okay, that sounds perfectly possible. As you said: 'Very simple '

Thank you

gilgamesh · 12 July 2009, 17:04

Aranym uses UAE's core.

Thorham · 14 July 2009, 22:25

Quote:

Originally Posted by gilgamesh

Aranym uses UAE's core.

Interesting, but isn't WinUaes cpu core more advanced?

gilgamesh · 15 July 2009, 10:31

Well, I don't think so, but then I can't tell when it forked.

Aranym has MMU support, which UAE has not. In that respect Aranym is more advanced.

29 June 2009, 22:04	#1
Thorham Computer Nerd Join Date: Sep 2007 Location: Rotterdam/Netherlands Age: 47 Posts: 3,806	WinUae 68k emulation question. Hi guys, I was wondering how easy/difficult it would be to get WinUae's 68k emulation to work as a stand alone program. I'm just asking out of curiosity, because some people on the Easy68k site want '020 support for Easy68k. Perhaps Toni could offer some pointers, so that I can pass them on to the Easy68k forum. The guy who made the Easy68k package is a professor who teaches 68000, amongst other things, and he's going to try to get some of his students to get the Uae 68k emulation to work in Easy68k. That's why I'm asking. Thank you

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29 June 2009, 22:10	#2
Rabbit80 Its hard being famous! Join Date: Aug 2008 Location: Gateway to the dales, UK Age: 43 Posts: 633	Wasn't this already done in one of the Atari emulators?

30 June 2009, 09:53	#3
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,414	WinUAE's 68k core has been used in several other programs including UADE & Hatari

30 June 2009, 11:08	#4
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,540	I don't know, I have never needed to have separate 680x0 emulation.. It shouldn't be too difficult. 99% of emulation code is in single big .c-file which is autogenerated by gencpu.c. This file includes all 680x0 instructions and can be configured (without recompiling) to any UAE supported CPU model. (not including 68000 prefetch and cycle-exact modes that have separate big .c-file) Model selection then simply configures 16-bit jump table (one for each possible instruction opcode). Empty slot = unknown instruction/not supported by current configured CPU, select correct exception, filled slot = pointer to instruction emulation code. Very simple Note that UAE/WinUAE sources do not come with those big .c-files. They need to be regenerated by running gencpu.

12 July 2009, 17:04	#6
gilgamesh Linux snob Join Date: Sep 2008 Location: Monkey Island Posts: 997	Aranym uses UAE's core.

15 July 2009, 10:31	#8
gilgamesh Linux snob Join Date: Sep 2008 Location: Monkey Island Posts: 997	Well, I don't think so, but then I can't tell when it forked. Aranym has MMU support, which UAE has not. In that respect Aranym is more advanced.

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