Hi all,
in theory, a C1571 drive can read MFM 360K ms-dos disks, so does a C64 (no C128 here) program exist for reading/writing such disks? Thanks Frank |
Am Dienstag, 24. Juli 2018, 15:54:37 CEST schrieb Francesco Messineo:
> Hi all, > in theory, a C1571 drive can read MFM 360K ms-dos disks, so does a C64 > (no C128 here) program exist for reading/writing such disks? > Thanks big blue reader (or little red reader, which is the "free" version) -- http://hitmen.eu http://ar.pokefinder.org http://vice-emu.sourceforge.net http://magicdisk.untergrund.net Perhaps there should be a new 'quantum' datatype; you would be able to take its address or value, but not both simultaneously. <Michael Shields> |
In reply to this post by Francesco Messineo
There is a program called BlueReader that could read certain kinds of datafiles. (I did not test this, but iit's worth a try) Bill On Tue, Jul 24, 2018 at 9:56 AM Francesco Messineo <[hidden email]> wrote: Hi all, |
Thanks, I'll try it :)
On Tue, Jul 24, 2018 at 4:03 PM, Bill Degnan <[hidden email]> wrote: > There is a program called BlueReader that could read certain kinds of > datafiles. > > http://www.vintagecomputer.net/commodore/64/d64_library/utilities/big_blue_reader_64.d64 > > (I did not test this, but iit's worth a try) > > Bill > > On Tue, Jul 24, 2018 at 9:56 AM Francesco Messineo > <[hidden email]> wrote: >> >> Hi all, >> in theory, a C1571 drive can read MFM 360K ms-dos disks, so does a C64 >> (no C128 here) program exist for reading/writing such disks? >> Thanks >> >> Frank >> > |
GEOS had GeoDos app can also read MS-Dos 😁 Terry Raymond On Tue, Jul 24, 2018, 8:12 AM Francesco Messineo <[hidden email]> wrote: Thanks, I'll try it :) |
Am 24. Juli 2018 8:23:24 PM schrieb Terry Raymond <[hidden email]>: > GEOS had GeoDos app can also read MS-Dos 😁
But wasn't the question about the C64? IIRC the MFM disk access was only working with fast IEC, which the C64 only supports with some additional hardware connecting the CIA shift registers from the userport with IEC. Or did I miss anything? André
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Am Dienstag, 24. Juli 2018, 21:37:01 CEST schrieb André Fachat:
> Am 24. Juli 2018 8:23:24 PM schrieb Terry Raymond <[hidden email]>: > > GEOS had GeoDos app can also read MS-Dos 😁 > > As can BDOS http://www.6502.org/users/andre/misc/index.html > > But wasn't the question about the C64? IIRC the MFM disk access was only > working with fast IEC, which the C64 only supports with some additional > hardware connecting the CIA shift registers from the userport with IEC. > > Or did I miss anything? na, why would it only work in burst mode? -- http://hitmen.eu http://ar.pokefinder.org http://vice-emu.sourceforge.net http://magicdisk.untergrund.net A critic is a man who knows the way but can't drive the car. <Kenneth Tynan> |
In reply to this post by André Fachat
On Tue, Jul 24, 2018 at 3:40 PM André Fachat <[hidden email]> wrote:
Nope, that's why I suggested the LittleBlueReader. This program is limited though. I'd stick with the uIEC |
In reply to this post by André Fachat
> On 2018-07-24, at 21:37, André Fachat <[hidden email]> wrote: > > > Am 24. Juli 2018 8:23:24 PM schrieb Terry Raymond <[hidden email]>: > > > GEOS had GeoDos app can also read MS-Dos 😁 > > As can BDOS http://www.6502.org/users/andre/misc/index.html > > But wasn't the question about the C64? IIRC the MFM disk access was only working with fast IEC, which the C64 only supports with some additional hardware connecting the CIA shift registers from the userport with IEC. > > Or did I miss anything? Memory may not serve well but I would still bet with reasonable confidence that I did read PC-DOS disks with C64, without any add-ons for "fast IEC". -- SD! - http://e4aws.silverdr.com/ |
On Wed, Jul 25, 2018 at 9:22 AM, <[hidden email]> wrote:
> >> On 2018-07-24, at 21:37, André Fachat <[hidden email]> wrote: >> >> >> Am 24. Juli 2018 8:23:24 PM schrieb Terry Raymond <[hidden email]>: >> >> > GEOS had GeoDos app can also read MS-Dos 😁 >> >> As can BDOS http://www.6502.org/users/andre/misc/index.html >> >> But wasn't the question about the C64? IIRC the MFM disk access was only working with fast IEC, which the C64 only supports with some additional hardware connecting the CIA shift registers from the userport with IEC. >> >> Or did I miss anything? > > Memory may not serve well but I would still bet with reasonable confidence that I did read PC-DOS disks with C64, without any add-ons for "fast IEC". Don't worry, I'll report what are the results, once I repair the 1571 (currently isn't willing to work). It just takes some time to be stolen from the rest of life. Frank |
In reply to this post by André Fachat
André Fachat wrote:
> IIRC the MFM disk access was only working with fast IEC Definitely not. I wrote a program 20 years ago that accessed MFM disks on a 1570 from the C64. I did not have enough expertise to read standard Pc disks, but it updated the first sectors with disk layout information and appropriate FAT so that MS-DOS could use the disk with 128 byte sectors. Regards, Michau. |
Hallo Michał,
> ... so that MS-DOS could use the disk with 128 byte sectors. Why 128 bytes? I rather would have expected 256 bytes instead of the original 512. Met vriendelijke groet / With kind regards, Ruud Baltissen www.Baltissen.org De informatie in dit e-mailbericht is vertrouwelijk en uitsluitend bestemd voor de geadresseerde. Wanneer u dit bericht per abuis ontvangt, verzoeken wij u contact op te nemen met de afzender per kerende e-mail. Verder verzoeken wij u in dat geval dit e-mailbericht te vernietigen en de inhoud ervan aan niemand openbaar te maken. Wij aanvaarden geen aansprakelijkheid voor onjuiste, onvolledige dan wel ontijdige overbrenging van de inhoud van een verzonden e-mailbericht, noch voor daarbij overgebrachte virussen. APG Groep N.V. is gevestigd te Heerlen en is ingeschreven in het handelsregister van de Kamer van Koophandel Limburg onder nummer 14099617 The information contained in this e-mail is confidential and may be privileged. It may be read, copied and used only by the intended recipient. If you have received it in error, please contact the sender immediately by return e-mail; please delete in this case the e-mail and do not disclose its contents to any person. We don't accept liability for any errors, omissions, delays of receipt or viruses in the contents of this message which arise as a result of e-mail transmission. APG Groep N.V. is registered in the trade register of the Chamber of Commerce Limburg, The Netherlands, registration number: 14099617 |
Baltissen, GJPAA (Ruud) wrote:
> Why 128 bytes? I rather would have expected 256 bytes instead of the original 512. If I remember correctly, CP/M disks have 128-byte sectors. But it was long time ago, so I might be wrong here and it might have been indeed 256 bytes. However, the point was that the format was different from standard 512-byte sectors so a custom Disk Parameter Block was necessary in the first sector. I did not know how to format the disk with 512-byte sectors, nor how to read such disks. Regards, Michau. |
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