06189: All sets in trs80.cpp: Current disk emu supports only SSSD !

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
06189	Misc.	Minor	Always	Apr 26, 2016, 12:54	Apr 30, 2019, 11:06

Tester	demotester	View Status	Public	Platform	MESS (Unofficial Binary)
Assigned To	Robbbert	Resolution	Fixed	OS	Windows XP
Status [?]	Resolved			Driver	trs/trs80.cpp
Version	0.172	Fixed in Version	0.174	Build	Normal
		Fixed in Git Commit		Github Pull Request #

Summary	06189: All sets in trs80.cpp: Current disk emu supports only SSSD !
Description	Older version of mess (like 0.161) supported 200k disks, i.e. SSDD or single sided double density (or 80 tracks). In newer versions this is changed to only SSSD or single sided single density (or 40 tracks), so 200k disks not boot anymore! Note: I found that this has been already discussed on forum (see link below) but the problem is "double density or 80 track disks" and not "double sided disks"! I am not sure is double sided disks supported on other emus, but on "ht1080z1.6.6" emu double sided disks are not supported, only SSSD and SSDD works. forum - support for double sided drives: http://forums.bannister.org/ubbthreads.php?ubb=showflat&Number=104182&page=3 I guess this can be easily fixed! EDIT: Hmm, seems "TRSTools1.12" also not support double sided disks! (at least the one called "dick-smith-system-80-diagnostic" ... hmm, but "sdltrs_win32_1_1_0" emu boot it fine!) Btw. used disk format (40 or 80 tracks / single or double density) can be easily checked on tool like "HxCFloppyEmulator" in Track Analyzer / Disk View ! Maybe the best solution would be if DSDD drive (double sided double density) is supported! NEW: hmm, or maybe not... http://www.trs-80.com/wordpress/hardware-replacement-floppy/#svd on above link for replacement floppy says: (see quote below and my notes on right side) ------------------------------------------------------------------------------------------------------------ Current features of the SVD are: Up to three diskette images can be loaded at once (drive 0, 1, and 2) up to 256k single-sided single density (SS SD) ................................................................................ <--- (note this !!!!) double density (SS DD) .......................................................................................................<--- (note this !!!!) reading/booting the diskette image writing the diskette image LEDs for power, drive0/1/2, track0, and write Supports Model I, III, 4, 4P and CoCo. DOES NOT SUPPORT DOUBLE SIDED DISKS. ...........................................................<--- (and note this !!!!) ------------------------------------------------------------------------------------------------------------ So, according to above, maybe the "double sided disks" is not necessary to emulate!?
Steps To Reproduce
Additional Information	Common File Formats for Emulated TRS-80 Floppy Disks http://tim-mann.org/trs80/dskspec.html EDIT: According to above Model 3/4 should use the JV3 disk format ! (but it seems that current mess uses JV1 disk format for Model 3/4, what is wrong) The disk format JV1 should be used for Model 1 and JV3 for Model 3/4 only! Here is an example for JV3 disk format: http://www.sol20.org/vmedia/sol20_clones.zip (Note: TRSTools reports for this JV3 format) Above is bootable on Model3 (tested) in other emu, but not in mess Model 3/4 driver !? (and of course, it does not work on Model 1)
Github Commit

Flags
Regression Version
Affected Sets / Systems	All sets in trs80.cpp

Attached Files

No.12558 demotester Tester Apr 26, 2016, 19:25 edited on: Apr 27, 2016, 12:09	Interesting, the "trs80l2" driver while running basic in older mess 0.161 on my PC system uses some 30% in Task-Manager, and in mess 0.172 it uses some 80% !? (and both versions are MESS (Unofficial Binary) tested from the same folder... wonder what could be a reason?) EDIT: Ok, found it... by default I had Videomode set on Auto, but if set it on OpenGL it will use only some 30% in Task-Manager ! (so, it seems the OpenGL works the best on my system)
No.12564 Robbbert Senior Tester Apr 30, 2016, 01:18	JV3 was never supported. Double Density broke when the floppy code was converted to the new wd-fdc. The driver hasn't been otherwise touched in ages and needs a rewrite, which I will do ... some time.
No.12573 Robbbert Senior Tester May 1, 2016, 05:40	Added back support for 200k JV1 disks.
No.12575 demotester Tester May 1, 2016, 09:24	Thanks for fixing the problem! :)
No.16393 star2root Viewer Apr 29, 2019, 01:47	Update on the disk issues: The TRS-80 Model I still only supports single density disks and I can't get the model I to boot TRS-DOS, just L-DOS and NEWDOS. The TRS-80 Model II seems to boot all Z80 based OS disks. The 68000 CPU is not yet supported. The TRS-80 Model III is actually working pretty well and is booting most DOS's in IMD format and seems to support double density disks. The TRS-80 Model IV boots the same disks as the model III, but I can't get it to load any model IV OS in any format. Of all these systems the Model III and Model II seem to work the best right now in MAME. If anyone wants to test and work on these issues, I have disk images that work in other Model I/III/IV emulators.
No.16395 Robbbert Senior Tester Apr 30, 2019, 11:06	Model 1 - no support for 219kB disks.