05791: bigboard: Use of any floppy from software causes crash

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
05791	Crash/Freeze	Critical (emulator)	Always	Dec 8, 2014, 20:10	Mar 30, 2021, 17:10

Tester	demotester	View Status	Public	Platform	MESS (Official Binary)
Assigned To		Resolution	Open	OS	Windows XP
Status [?]	Confirmed			Driver	xerox/xerox820.cpp
Version	0.156	Fixed in Version		Build	Normal
		Fixed in Git Commit		Github Pull Request #

Summary	05791: bigboard: Use of any floppy from software causes crash
Description	The bigboard crashes if started as mentioned in steps below!
Steps To Reproduce	mess bigboard -flop1 diag
Additional Information	Stack crawl (from 0.156) ----------------------------------------------------- Exception at EIP=00000000016FE041 (floppy_image_format_t::generate_track_from_levels(int, int, unsigned int, int, int, floppy_image)+0x0151): ACCESS VIOLATION While attempting to write memory at 0000000000000018 ----------------------------------------------------- RAX=0000000000000000 RBX=0000000000000090 RCX=0000000009B3A030 RDX=00000000000186A0 RSI=0000000000000000 RDI=00000000500003E8 RBP=0000000000226930 RSP=00000000002268B0 R8=0000000000000000 R9=000000000D519100 R10=000000000D549E40 R11=0000000000226C94 R12=0000000000000000 R13=0000000000000D80 R14=000000000000C350 R15=000000000000BB10 ----------------------------------------------------- Stack crawl: 00000000002268B0: 00000000016FE041 (floppy_image_format_t::generate_track_from_levels(int, int, unsigned int, int, int, floppy_image)+0x0151) 0000000000226A00: 00000000017042E2 (floppy_image_format_t::build_pc_track_fm(int, int, floppy_image, int, int, floppy_image_format_t::desc_pc_sector const, int, int, int, int)+0x11a2) 0000000000228320: 00000000016D9A71 (imd_format::load(io_generic, unsigned int, floppy_image)+0x0351) 00000000002283C0: 00000000014B9C75 (floppy_image_device::call_load()+0x00e5) 0000000000228400: 00000000014D7CF7 (device_image_interface::finish_load()+0x00e7) 00000000002284C0: 0000000001550B3C (image_postdevice_init(running_machine&)+0x008c) 0000000000228520: 0000000001444F55 (driver_device::device_start()+0x0085) 00000000002285E0: 000000000143E708 (device_t::start()+0x0168) 0000000000228640: 00000000014D1557 (running_machine::start_all_devices()+0x0067) 0000000000228780: 00000000014D25FD (running_machine::start()+0x0b0d) 00000000002287E0: 00000000014D5345 (running_machine::run(bool)+0x00c5) 000000000022F420: 00000000014CB74A (machine_manager::execute()+0x022a) 000000000022F610: 0000000001559460 (cli_frontend::execute(int, char)+0x0b60) 000000000022FDF0: 00000000009384C8 (utf8_main(int, char)+0x01a8) 000000000022FE50: 00000000018291BE (wmain+0x007e) 000000000022FF20: 00000000004013CA (__tmainCRTStartup+0x024a) 000000000022FF50: 00000000004014F8 (mainCRTStartup+0x0018) 000000000022FF80: 0000000076F159ED (BaseThreadInitThunk+0x000d) 000000000022FFD0: 000000007704C541 (RtlUserThreadStart+0x0021) </blockqoute>
Github Commit

Flags
Regression Version	0.155
Affected Sets / Systems	bigboard

Attached Files

No.11420 Robbbert Senior Tester Jan 27, 2015, 23:31	This isn't happening for me. The clone x820 crashes though. However the bigboard and mk82 (another clone) do not boot from the disk, instead giving a 'Disk error 10000000' when B is pressed.
No.11700 Duke Developer May 31, 2015, 14:38	Use "mess bigboard -u109:0 sa450 -flop1 diag" to prevent the crash. I'll leave this open though since there should be a warning and not a crash.
No.15870 shattered Tester Dec 5, 2018, 20:04	Crash happens because disk image has 40 tracks, but default floppy device only supports 35.
No.18619 Osso Moderator Mar 30, 2021, 17:10	Since 0.209 this isn't crashing anymore, but since 0.220 it gives only a black screen, while between 0.209 and 0.220 it loaded.