03000: tetrisp2j: Random hangs in some places.

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
03000	Crash/Freeze	Major	Random	Mar 5, 2009, 21:09	Dec 23, 2019, 14:43

Tester	Kale	View Status	Public	Platform	MAME (Self-compiled)
Assigned To		Resolution	Fixed	OS
Status [?]	Resolved			Driver	jaleco/tetrisp2.cpp
Version	0.129u6	Fixed in Version		Build	Debug
		Fixed in Git Commit		Github Pull Request #

Summary	03000: tetrisp2j: Random hangs in some places.
Description	Tetris Plus 2 (Japan version only) hangs randomly in some circustances. Happens on either at start-up (black screen) or on the attract mode. I say "randomly" because it's caused by the code at line 208: static READ16_HANDLER( tetrisp2_ip_1_word_r ) { return ( input_port_read(space->machine, "SYSTEM") & 0xfcff ) \| ( mame_rand(space->machine) & ~0xfcff ) \| ( 1 << (8 + (mame_rand(space->machine)&1)) ); } This is a kludge and should be fixed anyway...
Steps To Reproduce
Additional Information
Github Commit

Flags
Regression Version	0.129u6 (added)
Affected Sets / Systems	tetrisp2j

Attached Files

No.13498 Kale Developer Dec 25, 2016, 05:15	bits 8 and 9 are likely to be just h/v-blank bits
No.17277 MetalGod Senior Tester Dec 15, 2019, 22:16	is this fixed? I'm unable to reproduce it.
No.17279 izius Tester Dec 18, 2019, 17:34	Just tested a few old versions. This bug occured up to 0.141u1. In 0.141u2 the clone tetrisp2ja was added, so this was probabily fixed by who added the clone.
No.17280 MetalGod Senior Tester Dec 18, 2019, 20:40	Tested on debug mode, 30 times in 64 bit version and other 30 times in 32 bit version. The first random issue (hang on initial black screen) never happened. I also left the game running 4 times for 10 minutes and it never hanged.