internal floppy drive works fine under GEOS65, but not in 'normal' mode

Phura · August 6, 2024 at 7:57 AM 13 posts here

Hi folks,

with my MEGA65 (R6) the inetrnal floppy drive can read 30 years old disks when using GEOS65. But the same disks give an error 73 when trying to read in MEGA-mode.

HEADER command works, takes some action and finishes - but still error 73 then.

I was not able to read any disk outside GEOS65. Still clueless!

Any comparable experiences outside there?

++++++++++++++++++++++++++++++++++++++++++++

Bei meinem MEGA65 (R6) kann das interne Diskettenlaufwerk bei Verwendung von GEOS65 30 Jahre alte Disketten lesen. Aber dieselben Disketten geben beim Versuch, sie im MEGA-Modus zu lesen, einen Fehler 73 aus.

Der HEADER-Befehl funktioniert, führt einige Aktionen aus und wird beendet – aber dann kommt immer noch Fehler 73.

Ich konnte keine Diskette außerhalb von GEOS65 lesen.

KR

Phura

FrankyB · August 6, 2024 at 8:55 AM 2 posts here

Hm, kein Plan, bei mir geht das eigentlich - aber ich hab auch ehrlich gesagt keine "alten" Disketten verwendet sondern direkt mal formatiert & dann benutzt.

Hab grad mal ein paar überkommene 3"5 eingelegt, die bringen Fehler "66,Illegal Track or Sector,110,05", oder, auch populär, "27,Read Error,40,00" aber Dein Fehler 73 ist nicht dabei.

Geos65 hängt recht lange an den "Fehler 27", bei Fehler 66 schmeißt es dann den "disk error $02"

--

Not reproducable here, Mega65 formatted disks are working as expected, differently formatted disks throw errors as expected, but not error 73

SkulleateR · August 6, 2024 at 10:57 AM 4 posts here

Maybe a dumb question but : do you do a MOUNT (without additional parameters) in Basic to tell the system you want to access the internal drive ?

Phura · August 6, 2024 at 11:03 AM 13 posts here

Yes Sir, It has been mounted.

BTW: There are no silly questions, but maybe weired answers.

wweicht · August 6, 2024 at 11:03 AM 2 posts here

Quote from FrankyB

Dein Fehler 73 ist nicht dabei.

Bei CBM-Laufwerken ist 73 keine Fehler sondern die Einschaltmeldung ....

Gruß

Werner

Phura · August 6, 2024 at 11:26 AM 13 posts here

Ooops, vvlt. war's doch eine andere Nummer, ich schaue nachher nochmal nach.

Ich Schusselchen, ich.

FrankyB · August 6, 2024 at 11:39 AM 2 posts here

Quote from wweicht

Quote from FrankyB

Dein Fehler 73 ist nicht dabei.

Bei CBM-Laufwerken ist 73 keine Fehler sondern die Einschaltmeldung ....
Gruß
Werner

Jetzt wo Du das so gekonnt sagst hab ich mich an mein schlaues Buch vom Datenbäcker erinnert, da sind ja tatsächlich ganze Seiten mit den Nummern drin...

SkulleateR · August 6, 2024 at 12:01 PM 4 posts here

Quote from Phura

Yes Sir, It has been mounted.
BTW: There are no silly questions, but maybe weired answers.

What kind of disks are you using (DD / HD) ? If HD -> got the second hole covered ?

Phura · August 6, 2024 at 5:15 PM 13 posts here

Also, ich schusselte und korrigiere nun:

Damals (TM) formatierte DD-Disketten von VERBATIM.

MOUNT

DIR

Es kommt die 27, der gemeine READ ERROR.

HEADER "NEU" ,I11

knarrt, brummt, röchelt - fertig

DIR

nix

immer noch nix

Hard Reset

GEOS65: Das ist die leere Diskette "NEU"

SkulleateR · August 6, 2024 at 6:24 PM 4 posts here

Maybe try to write back any D81 Image (with BACKUP) instead of formatting

If that won't work, I'm out of ideas ...

Phura · August 6, 2024 at 8:16 PM 13 posts here

Writing back a D81 image to the physical drive doesn't work as well. Nothing happens. The disc remains untouched.

Phura · August 8, 2024 at 10:19 PM 13 posts here

it is the same story with an external 1581: Does only work with GEOS65:

Please login to see this attachment.

dddaaannn · August 9, 2024 at 5:46 AM 2 posts here

There are some known timing inaccuracies in the IEC serial routines in the MEGA65 KERNAL that noticeably interfere with some external drives and printers, and this may explain the behavior you're seeing. These are getting fixed over the next couple of releases.

It's possible that GEOS is using its own low-level IEC driver that happens to work better. (I don't actually know for sure.) You might see better results in GO64 mode as well.

wweicht · August 9, 2024 at 6:39 AM 2 posts here

Quote from dddaaannn

It's possible that GEOS is using its own low-level IEC driver

yes, Geos use ownn disk drivers.

Phura : No idea , but do you have a RAM expansin in your setup? As far I remember Geos can only work correctly with 2 drives (same type). If you have a RAM expansion and 3 or 4 drives, on drive must be a RAM...

Phura · August 9, 2024 at 7:57 AM 13 posts here

Quote from dddaaannn

You might see better results in GO64 mode as well.

Unfortunately, is the same issue in C64 mode.

Phura · August 9, 2024 at 8:05 AM 13 posts here

Up to now, I have not been able to use a RAM Expansion with GEOS65.

Currently I have no physical RAM device working.

And borrrowing RAM from the MEGA65 by simply using CONFIGURE sends me strictly to the SuperDebugger.

SkulleateR · August 9, 2024 at 10:01 AM 4 posts here

Quote from dddaaannn

There are some known timing inaccuracies in the IEC serial routines in the MEGA65 KERNAL that noticeably interfere with some external drives and printers, and this may explain the behavior you're seeing.

With the internal drive ????

Quote from Phura

with my MEGA65 (R6) the inetrnal floppy drive ...

dddaaannn · August 10, 2024 at 3:54 AM 2 posts here

Quote from SkulleateR

Quote from dddaaannn

There are some known timing inaccuracies in the IEC serial routines in the MEGA65 KERNAL that noticeably interfere with some external drives and printers, and this may explain the behavior you're seeing.

With the internal drive ????

Quote from Phura

with my MEGA65 (R6) the inetrnal floppy drive ...

ah sorry, no not with the internal drive. I missed that bit. I'm not able to reproduce these issues with the internal drive.

Phura · August 10, 2024 at 9:42 AM 13 posts here

So I am the only one beaten with this fate?

Phura · August 10, 2024 at 10:00 AM 13 posts here

BTW: 'FLOPPY/D81 IMAGER V1.7' reads the directory of my internal floppy drive without any problems.

6 users have written here