Second Samurai AGA crashes WinUAE

[Radertified]

This was reported on Discord. The exact thing they wrote was:

Second Samurai AGA glitches out on Winuae A1200 + 8MB Fast config, but works fine on real A1200 + Fastram, and has smoother scrolling than Chipmem only config.

I haven't tested on a real A1200, but I tested the IPF on WinUAE 4.4.0 and the latest beta. Once you insert disk 2 and press fire, the audio glitches and then WinUAE crashes.

I'm using the best compatibility A1200 config and giving it 8mb Z2 Fast RAM.

I've attached log and dmp files.

[Zarnal]

Exact.

I managed to reproduce with the IPF. The cracked version is also affected.

Horrible sound during " Loading " screen and crash.

Edit : ExceptionFilter Trap : 809F0000 7FFF4406 00000000

[paraj]

Crashes on this instruction:

        MOVE.L (A0)+,D1 ; A0 = 0x3c9ffffe

Looks like it's doing a long-word read that ends up reading 2 bytes beyond end of fast ram.

        MOVE.L (A0)+,D1 ; A0 = 0x3c9ffffe

 	winuae.exe!do_get_mem_long(unsigned int * a) Line 23	C++
>	winuae.exe!memory_get_long(unsigned int addr) Line 3720	C++
 	winuae.exe!get_long(unsigned int addr) Line 540	C++
 	winuae.exe!mem_access_delay_long_read_ce020(unsigned int addr) Line 7980	C++
 	winuae.exe!get_long_ce030(unsigned int addr) Line 114	C++
 	winuae.exe!op_2018_21_ff(unsigned int opcode) Line 10082	C++
 	winuae.exe!m68k_run_2ce() Line 5919	C++
 	winuae.exe!m68k_go(int may_quit) Line 6456	C++
 	winuae.exe!do_start_program() Line 1052	C++
 	winuae.exe!start_program() Line 1068	C++
 	winuae.exe!real_main2(int argc, wchar_t * * argv) Line 1208	C++
 	winuae.exe!real_main(int argc, wchar_t * * argv) Line 1222	C++
 	winuae.exe!WinMain2(HINSTANCE__ * hInstance, HINSTANCE__ * hPrevInstance, wchar_t * lpCmdLine, int nCmdShow) Line 7156	C++
 	winuae.exe!wWinMain(HINSTANCE__ * hInstance, HINSTANCE__ * hPrevInstance, wchar_t * lpCmdLine, int nCmdShow) Line 8045	C++
 	[Inline Frame] winuae.exe!invoke_main() Line 118	C++
 	winuae.exe!__scrt_common_main_seh() Line 288	C++
 	kernel32.dll!@BaseThreadInitThunk@12()	Unknown
 	ntdll.dll!__RtlUserThreadStart()	Unknown
 	ntdll.dll!__RtlUserThreadStart@8()	Unknown

Can also be reproduced by attached config/exe:

	move.l $3c9ffffe, d0
	rts

[Toni Wilen]

It crashes because Z2 RAM does not have "safety barrier" at the end of RAM which allows unaligned long/word accesses to not hit non-mapped RAM. This got broken when PCMCIA support was improved (memory mapping code thinks PCMCIA is memory mapped immediately after Z2 but PCMCIA is never direct mapped)

EDIT: fixed but this does not affect sound glitch which happens because game goes to infinite loop, reading random memory.

Does this game really work on A1200 with 68EC020 CPU + Z2 RAM? (Which is not common config) 68020 or higher (32-bit address space) is not same config.

[Aardvark]

It does work with one of these Fastmem expansions https://www.ebay.com/itm/164321559017, but not with ACA1233n which has option to turn off 68030 but still use 8mb of acceleration memory (ends up with the same sound glitch).
Tested on 1D4 motherboard with KS3.0

And yes, the game is smoother with Fastmem.

Edit: The ebay link is a 8mb expansion card "designed by edu.arena based on the TF320 by Stephen Leary"

[Zarnal]

Originally Posted by Toni Wilen

EDIT: fixed but this does not affect sound glitch which happens because game goes to infinite loop, reading random memory.

Is this caused by the usual CPU concerns with EC020/Fast ?