Amiga emulator for 64 bit ARM?

rsn8887 · 31 October 2018, 18:08

Is there any working Amiga emulator that runs natively on 64Bit ARM, compiled as true 64Bit elf?

rsn8887 · 31 October 2018, 18:20

Would Amiberry work compiled as a 64bit executable? I have run into a roadblock trying to port UAE4ALL2 to Switch because the toolchain only supports 64bit elf, and the famec core does all kinds of pointer gymnastics that crash when compiled as 64bit app.

plasmab · 31 October 2018, 19:14

Quote:

Originally Posted by rsn8887

Would Amiberry work compiled as a 64bit executable? I have run into a roadblock trying to port UAE4ALL2 to Switch because the toolchain only supports 64bit elf, and the famec core does all kinds of pointer gymnastics that crash when compiled as 64bit app.

You can probably compile fs-uae for ARM64. I need to ask why you'd want to though? Do you suspect the ARM64 instructions might make it run faster?

rsn8887 · 31 October 2018, 20:47

I am just trying to get an emulator to run on a 64bit system without crashing.

I think I understand it now. The problem was that the famec core did a bunch of pointer gymnastics. I used -fpermissive when compiling that code. So what should have been compilation errors just returned warnings. Those errors led to crashing.

Now that I understand the problem, I think I might be able to fix the code, so it becomes 64 bit compatible.

rsn8887 · 31 October 2018, 21:50

I tried to make famec, as used by UAE4All2, 64bit compatible. At least as long as emulated memory is located in the lower 32bits it might work.

I have zero knowledge about 68k emulation details. Maybe someone with more experience could look over my commit and tell me if this is an ok approach, or if it will never work this way?

Here is my commit:
https://github.com/rsn8887/uae4all2/...261a55d541a57e

I simply tried to elevate all pointers to 64bit, and make sure all the other uae* types have the correct widths.

Something in my gut tells me that this will never work. But I don't know why?

If it will never work this way, I'd rather not waste more time on it.

twenty90seven · 02 November 2018, 12:40

An Amiga emulator for Switch would be very cool! Glad it is being looked into (nice work with the one on the Vita!)

31 October 2018, 18:08	#1
rsn8887 Registered User Join Date: Oct 2006 Location: USA Posts: 1,058	Amiga emulator for 64 bit ARM? Is there any working Amiga emulator that runs natively on 64Bit ARM, compiled as true 64Bit elf?

31 October 2018, 21:50	#5
rsn8887 Registered User Join Date: Oct 2006 Location: USA Posts: 1,058	I tried to make famec, as used by UAE4All2, 64bit compatible. At least as long as emulated memory is located in the lower 32bits it might work. I have zero knowledge about 68k emulation details. Maybe someone with more experience could look over my commit and tell me if this is an ok approach, or if it will never work this way? Here is my commit: https://github.com/rsn8887/uae4all2/...261a55d541a57e I simply tried to elevate all pointers to 64bit, and make sure all the other uae* types have the correct widths. Something in my gut tells me that this will never work. But I don't know why? If it will never work this way, I'd rather not waste more time on it. Last edited by rsn8887; 31 October 2018 at 22:30.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
64-bit WinUAE doesn't work on 64-bit Windows XP	mark_k	support.WinUAE	6	24 December 2017 21:17
UAE4ARM, actually for ARM?	Enverex	support.OtherUAE	3	08 June 2016 11:58
REQ: 17-Bit Artwork 2 (1988-04)(17-Bit Software)	Sea7	request.Demos	5	13 May 2011 01:07
8 bit to optimized 6 bit palette histogram improvements needed	NovaCoder	Coders. General	0	14 April 2011 02:13
Amiga 600 (16 BIT), Amiga 1200 (??? BIT)?	etheridge	support.Hardware	9	20 May 2002 02:25

31 October 2018, 18:20	#2
rsn8887 Registered User Join Date: Oct 2006 Location: USA Posts: 1,058	Would Amiberry work compiled as a 64bit executable? I have run into a roadblock trying to port UAE4ALL2 to Switch because the toolchain only supports 64bit elf, and the famec core does all kinds of pointer gymnastics that crash when compiled as 64bit app.

31 October 2018, 20:47	#4
rsn8887 Registered User Join Date: Oct 2006 Location: USA Posts: 1,058	I am just trying to get an emulator to run on a 64bit system without crashing. I think I understand it now. The problem was that the famec core did a bunch of pointer gymnastics. I used -fpermissive when compiling that code. So what should have been compilation errors just returned warnings. Those errors led to crashing. Now that I understand the problem, I think I might be able to fix the code, so it becomes 64 bit compatible.

02 November 2018, 12:40	#6
twenty90seven twenty90seven Join Date: Jun 2012 Location: Brisbane, Australia Posts: 196	An Amiga emulator for Switch would be very cool! Glad it is being looked into (nice work with the one on the Vita!)

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)