09143: altos5: Regression - difficulties with floppy disks

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
09143	Media Support	Major	Always	Mar 14, 2025, 04:55	3 days ago

Tester	Robbbert	View Status	Public	Platform	MAME (Official Binary)
Assigned To	AJR	Resolution	Fixed	OS
Status [?]	Resolved			Driver	altos/altos5.cpp
Version	0.275	Fixed in Version	0.282GIT	Build	64-bit
		Fixed in Git Commit	be6db9f	Github Pull Request #

Summary	09143: altos5: Regression - difficulties with floppy disks
Description	This system used to be able to boot all the floppies in the software list, but that is no longer the case.
Steps To Reproduce	Try the following: >mame altos5 cpm220so You get: Bdos Err On A: Bad Sector >mame altos5 mpm210so You get: Bdos Err On A: Bad Sector >mame altos5 altdiag This boots, but if you try to run any of the diagnostic programs listed, it will say the file can't be found. All these floppies used to work years ago, back when the software list was created.
Additional Information	I have a number of loose software floppies for this system, but none of them can boot either. The other diagnostic versions do the same thing as the one above.
Github Commit

Flags
Regression Version
Affected Sets / Systems	altos5

Attached Files

No.23736 AJR Developer 4 days ago	Regression appears to be due to Z80 DMA changes in 339bb2758640202e5378a1c2b1c19b2ef46fa1d9.
No.23737 Robbbert Moderator 3 days ago	Thanks, much better now. :)