07053: osbexec: Stuck on PERFORMING SELF TEST

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
07053	Crash/Freeze	Critical (emulation)	Always	Jul 25, 2018, 12:16	Jul 25, 2018, 20:11

Tester	Robbbert	View Status	Public	Platform	MAME (Self-compiled)
Assigned To	AJR	Resolution	Fixed	OS	Windows Vista/7/8 (64-bit)
Status [?]	Resolved			Driver	osborne/osbexec.cpp
Version	0.200	Fixed in Version	0.201	Build	32-bit
		Fixed in Git Commit		Github Pull Request #

Summary	07053: osbexec: Stuck on PERFORMING SELF TEST
Description	Machine will not go beyond self test
Steps To Reproduce
Additional Information	Although machine is marked as not working, this is a regression.
Github Commit

Flags
Regression Version	0.192
Affected Sets / Systems	osbexec

Attached Files

No.15291 Tafoid Administrator Jul 25, 2018, 13:07	Specifically, changes to the z80sio has caused this, but where other failing sets were resolved rather quickly (ccs300, jgz80, uts20), this one fell through the cracks and was not reported here when the next release happened. https://github.com/mamedev/mame/commit/6407707ccc3445af120e5f7429392d4d344321e9 https://github.com/mamedev/mame/commit/711d7b490e48b4dd4bbaae46cbde6b8f87788be1 https://github.com/mamedev/mame/commit/3166f52c3fa865449879e08f8c62b832babb2ac0
No.15292 AJR Developer Jul 25, 2018, 20:11	This was really my mistake for not having originally understood how MAME's RS232 emulation worked. I thought that inversions were necessary since the 1488/1489 line drivers and receivers are technically inverters, but MAME uses the logical levels rather than the signal levels.

No.15291

Tafoid

Administrator

Jul 25, 2018, 13:07

Specifically, changes to the z80sio has caused this, but where other failing sets were resolved rather quickly (ccs300, jgz80, uts20), this one fell through the cracks and was not reported here when the next release happened.

https://github.com/mamedev/mame/commit/6407707ccc3445af120e5f7429392d4d344321e9
https://github.com/mamedev/mame/commit/711d7b490e48b4dd4bbaae46cbde6b8f87788be1
https://github.com/mamedev/mame/commit/3166f52c3fa865449879e08f8c62b832babb2ac0

No.15292

AJR

Developer

Jul 25, 2018, 20:11

This was really my mistake for not having originally understood how MAME's RS232 emulation worked. I thought that inversions were necessary since the 1488/1489 line drivers and receivers are technically inverters, but MAME uses the logical levels rather than the signal levels.