Re: Emulators that can read .edd or .nib files?

Newsgroups	comp.sys.apple2
Date	2016-01-18 11:57 -0800
References	(3 earlier) <3c0c4f62-c411-44b8-8926-c8338c999822@googlegroups.com> <058767c7-a84f-4ee4-9be2-7d19016463a1@googlegroups.com> <946901cc-4eb3-4a00-b93e-d965f14893a8@googlegroups.com> <9b48c8d0-00ae-44dc-b313-2d7a19b716c4@googlegroups.com> <78bfdac9-5de8-423a-86f7-2f4643b08a0e@googlegroups.com>
Message-ID	<e2e907fe-4a7f-4f46-aa8a-aebcbb663ab1@googlegroups.com> (permalink)
Subject	Re: Emulators that can read .edd or .nib files?
From	Tom Greene <tom@cowgod.org>

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On Monday, January 18, 2016 at 12:55:20 PM UTC-5, Michael 'AppleWin Debugger Dev' wrote:
> On Thursday, January 14, 2016 at 11:05:55 AM UTC-8, Antoine Vignau wrote:
> > At 300 RPM, with a bit every 4us, you can write around 6656 bytes.
> > With a 6*2 encoding, with a few sync nibbles, you can write the equivalent of around 19 sectors, 18 for sure.
> > 
> > For the nb of tracks, some drives go up to 40 tracks, the disk II can go to 36 with no troubles.
> > 
> > The RWTS can be patched to format more than 35 tracks, but not more than 16 sectors.
> > 
> > Antoine
> 
> Doesn't this get into the whole CAV / CLV (constant Angular Velocity vs Constant Linear Velocity) thing?
> 
> * https://en.wikipedia.org/wiki/Constant_angular_velocity
> * https://en.wikipedia.org/wiki/Constant_linear_velocity
> 
> Sure, 6656 bytes is for track 0, but what is it for track 34 ?
> 
> No, seriously, I'm actually curious because did anyone actually do this on the Apple 2 ??  I mean it would be total PITA, but theoretically we should be able to easily store 19+ sectors on track 34.
> 
> On the C64 apparently they had 20 sectors!?  (684*324) !?
> http://www.pagetable.com/?p=656

I can't think of any way this would be possible with the Disk II hardware. The amount of data that can be written in one revolution of the drive is constant regardless of what track the head is on because the drive speed is fixed and so is the data rate between the controller and drive.

Tom

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Emulators that can read .edd or .nib files? cbeust@gmail.com - 2016-01-11 21:46 -0800
  Re: Emulators that can read .edd or .nib files? Steve Nickolas <usotsuki@buric.co> - 2016-01-12 07:16 +0100
    Re: Emulators that can read .edd or .nib files? qkumba <peter.ferrie@gmail.com> - 2016-01-12 07:50 -0800
  Re: Emulators that can read .edd or .nib files? BLuRry <brendan.robert@gmail.com> - 2016-01-12 09:09 -0800
    Re: Emulators that can read .edd or .nib files? qkumba <peter.ferrie@gmail.com> - 2016-01-13 07:59 -0800
      Re: Emulators that can read .edd or .nib files? BLuRry <brendan.robert@gmail.com> - 2016-01-13 12:19 -0800
        Re: Emulators that can read .edd or .nib files? Antoine Vignau <antoine.vignau@laposte.net> - 2016-01-14 08:23 -0800
          Re: Emulators that can read .edd or .nib files? BLuRry <brendan.robert@gmail.com> - 2016-01-14 09:06 -0800
            Re: Emulators that can read .edd or .nib files? Antoine Vignau <antoine.vignau@laposte.net> - 2016-01-14 11:05 -0800
              Re: Emulators that can read .edd or .nib files? BLuRry <brendan.robert@gmail.com> - 2016-01-14 11:15 -0800
                Re: Emulators that can read .edd or .nib files? Michael J. Mahon <mjmahon@aol.com> - 2016-01-14 15:28 -0600
                Re: Emulators that can read .edd or .nib files? BLuRry <brendan.robert@gmail.com> - 2016-01-14 13:36 -0800
                Re: Emulators that can read .edd or .nib files? fadden <thefadden@gmail.com> - 2016-01-14 14:35 -0800
                Re: Emulators that can read .edd or .nib files? Cedric Beust <cbeust@gmail.com> - 2016-01-15 06:56 -0800
                Re: Emulators that can read .edd or .nib files? Steve Nickolas <usotsuki@buric.co> - 2016-01-15 16:33 +0100
                Re: Emulators that can read .edd or .nib files? Antoine Vignau <antoine.vignau@laposte.net> - 2016-01-15 08:53 -0800
                Re: Emulators that can read .edd or .nib files? Michael J. Mahon <mjmahon@aol.com> - 2016-01-15 11:22 -0600
                Re: Emulators that can read .edd or .nib files? Don Bruder <dakidd@sonic.net> - 2016-01-15 09:58 -0800
                Re: Emulators that can read .edd or .nib files? qkumba <peter.ferrie@gmail.com> - 2016-01-15 19:56 -0800
                Re: Emulators that can read .edd or .nib files? gids.rs@sasktel.net - 2016-01-15 22:33 -0800
                Re: Emulators that can read .edd or .nib files? Michael J. Mahon <mjmahon@aol.com> - 2016-01-16 03:02 -0600
                Re: Emulators that can read .edd or .nib files? qkumba <peter.ferrie@gmail.com> - 2016-01-16 08:27 -0800
                Re: Emulators that can read .edd or .nib files? gids.rs@sasktel.net - 2016-01-14 15:49 -0800
                Re: Emulators that can read .edd or .nib files? ian kim <quick09@gmail.com> - 2016-01-19 03:43 -0800
                Re: Emulators that can read .edd or .nib files? BLuRry <brendan.robert@gmail.com> - 2016-01-19 08:11 -0800
              Re: Emulators that can read .edd or .nib files? "Michael 'AppleWin Debugger Dev'" <michael.pohoreski@gmail.com> - 2016-01-18 09:55 -0800
                Re: Emulators that can read .edd or .nib files? "Michael 'AppleWin Debugger Dev'" <michael.pohoreski@gmail.com> - 2016-01-18 11:02 -0800
                Re: Emulators that can read .edd or .nib files? Tom Greene <tom@cowgod.org> - 2016-01-18 11:57 -0800
                Re: Emulators that can read .edd or .nib files? "Michael 'AppleWin Debugger Dev'" <michael.pohoreski@gmail.com> - 2016-01-18 12:02 -0800
                Re: Emulators that can read .edd or .nib files? Tom Greene <tom@cowgod.org> - 2016-01-18 12:36 -0800
                Re: Emulators that can read .edd or .nib files? Howard Poe <hojopo@gmail.com> - 2016-01-18 13:19 -0800
                Re: Emulators that can read .edd or .nib files? qkumba <peter.ferrie@gmail.com> - 2016-01-18 20:49 -0800
                Re: Emulators that can read .edd or .nib files? gids.rs@sasktel.net - 2016-01-19 08:30 -0800
                Re: Emulators that can read .edd or .nib files? Antoine Vignau <antoine.vignau@laposte.net> - 2016-01-19 14:02 -0800
                Re: Emulators that can read .edd or .nib files? qkumba <peter.ferrie@gmail.com> - 2016-01-20 08:48 -0800
            Re: Emulators that can read .edd or .nib files? scott@alfter.diespammersdie.us (Scott Alfter) - 2016-01-21 17:12 +0000
  Re: Emulators that can read .edd or .nib files? D Finnigan <dog_cow@macgui.com> - 2016-01-12 19:48 +0000

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