Am 11. April 2026 10:41:54 schrieb Francesco Messineo <francesco.messineo_at_gmail.com>: > The first fast format routine I've seen in the old days was the > "speeddos plus" one that was a very popular 1541/C64 hardware mod in > Italy since 1984 (if memory works). I think the speeddos plus > modification originated in Germany.. > I seem to remember that it would just write each track without reading > back the sectors but I may be very well wrong after all these years. I > still have two speeddos plus systems, one is my original C64 and one > is an SX-64 donated from a local friend. Both were modified around mid > 1985. > Frank IZ8DWF I think all the routines do away with the verify. What my routine - IIRC - also removed was the measurement of the drive speed and thus track length in bytes that the original does (every track?). That's probably why it failed on other drives. My guess is, without having looked at the code yet, that the working routine measures it on the first track and then just calculates the gaps for all the other tracks. André > > On Sat, Apr 11, 2026 at 10:27 AM André Fachat <afachat_at_gmx.de> wrote: >> >> >> >> Am 11. April 2026 03:27:33 schrieb Jesus Cea <jcea_at_jcea.es>: >> >>> You could be interested in this: >>> >>> https://x.com/commodoreihs/status/2040555413326672219 >>> >>> """ >>> It took over a minute and a half to format a new disk using the native >>> Commodore 64 / 1541 disk drive commands. Mike J. Henry of Starpoint >>> Software and Basement Boys Software (Fast Hack-'em) fame wrote a 15 >>> second format routine, which was apparently at some point modified by >>> Alf Maier. I don't know exactly what Alf modified, but I think this was >>> widely distributed on QuantumLink in the mid-to-late 80s. >>> You can download the program from Bo Zimmerman's site here: >>> https://zimmers.net/anonftp/pub/cbm/c64/diskutil/routines/Format%2015%20seconds.prg >>> I disassembled the code and uploaded the result to GitHub: >>> https://github.com/commodoreihs/15_second_format/tree/main >>> Does anyone know the precise history of 15 second format? >>> """ >>> >>> https://github.com/commodoreihs/15_second_format/tree/main >>> >>> https://zimmers.net/anonftp/pub/cbm/c64/diskutil/routines/Format%2015%20seconds.prg >> >> >> Very cool work by Dave! >> >> That reminds me of the 12s format routine I once submitted to the German >> 64er magazin. >> >> It came back a remark on the paper 'bringen wenn funktioniert' which means >> publish it if it works. Which it didn't of course. I only had a single 1541 >> to test on, so it was a classic 'works on my machine'. >> >> I will certainly look into that routine! >> >> André >>> >>> >>> -- >>> Jesús Cea Avión _/_/ _/_/_/ _/_/_/ >>> jcea_at_jcea.es - https://www.jcea.es/ _/_/ _/_/ _/_/ _/_/ _/_/ >>> Twitter: _at_jcea _/_/ _/_/ _/_/_/_/_/ >>> jabber / xmpp:jcea_at_jabber.org _/_/ _/_/ _/_/ _/_/ _/_/ >>> "Things are not so easy" _/_/ _/_/ _/_/ _/_/ _/_/ _/_/ >>> "My name is Dump, Core Dump" _/_/_/ _/_/_/ _/_/ _/_/ >>> "El amor es poner tu felicidad en la felicidad de otro" - LeibnizReceived on 2026-04-11 10:00:25
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