Groups | Search | Server Info | Login | Register
Groups > comp.emulators.apple2 > #2270
| Newsgroups | comp.emulators.apple2 |
|---|---|
| Date | 2017-02-23 18:29 -0800 |
| References | <7c4f51c8-ebec-401c-9b17-5a8b89f5d768@googlegroups.com> <e029d0bd-4cd3-4104-ba2a-3b46659e0390@googlegroups.com> <bc36ba00-c65f-46ce-b961-e5fb8c8b04cd@googlegroups.com> <73b17e3e-c1cc-4512-9885-b8c5cef9fc62@googlegroups.com> <907fb263-d80c-4483-80cc-2b59cec96a05@googlegroups.com> |
| Message-ID | <7ce58a3f-80d0-4d5b-a87b-4baeca686faf@googlegroups.com> (permalink) |
| Subject | Re: Clues tracking down an emulator bug (San inc crack of Airheart) |
| From | John Brooks <jbrooks@blueshiftinc.com> |
On Tuesday, February 21, 2017 at 7:56:07 AM UTC-8, Michael AppleWin Debugger Dev wrote: > On Monday, February 20, 2017 at 10:19:11 AM UTC-8, Peter Ferrie wrote: > > > > After chatting with qkumba on twitter, I tried the prodos port (using an emulated CFFA card) and it appeared to work correctly. So, unclear. It may be the decompression routine or something. > > > > The problem is in my floppy-drive code, that works in AppleWin because it's not cycle-exact. > > I should have checked MAME at the time - it clearly doesn't work there. > > I will fix it. > > > > Since the "ProDOS" version works (it's really not using ProDOS at all once the game starts loading - it's all ProRWTS code), then it's not the decompression code. > > Peter, before you fix this -- can you send us currently non-cycle-exact code? > > i.e. We can add this to AppleWin as a test case to detect when/if the disk cycle timing emulation is fixed. > > Thanks, > Michael That reminds me, the ProDOS RWTS routines allow data coming in every 28 cycles which is 10% faster than normal 300RPM and the worst-case limit for a drive which is within-spec. Ideally emulators would allow running in a config where .po & .dsk bitstreams arrive 10% faster (disk nibble every 28.8usec as a result of 5% slow writing drive + 5% fast reading drive). Nibble & bitstream images (.nib & .edd) can arrive +5% faster and be within spec. Allowing these drive speed variations in the emulators would likely catch more failure cases in both emulators and disk routines. -JB @JBrooksBSI
Back to comp.emulators.apple2 | Previous | Next — Previous in thread | Next in thread | Find similar
Clues tracking down an emulator bug (San inc crack of Airheart) Zellyn <zellyn@gmail.com> - 2017-02-19 14:51 -0800
Re: Clues tracking down an emulator bug (San inc crack of Airheart) Zellyn <zellyn@gmail.com> - 2017-02-19 17:15 -0800
Re: Clues tracking down an emulator bug (San inc crack of Airheart) BLuRry <brendan.robert@gmail.com> - 2017-02-19 21:16 -0800
Re: Clues tracking down an emulator bug (San inc crack of Airheart) Peter Ferrie <peter.ferrie@gmail.com> - 2017-02-20 10:19 -0800
Re: Clues tracking down an emulator bug (San inc crack of Airheart) BLuRry <brendan.robert@gmail.com> - 2017-02-20 13:59 -0800
Re: Clues tracking down an emulator bug (San inc crack of Airheart) Zellyn <zellyn@gmail.com> - 2017-02-20 14:42 -0800
Re: Clues tracking down an emulator bug (San inc crack of Airheart) Michael AppleWin Debugger Dev <michael.pohoreski@gmail.com> - 2017-02-21 07:56 -0800
Re: Clues tracking down an emulator bug (San inc crack of Airheart) Zellyn <zellyn@gmail.com> - 2017-02-21 08:11 -0800
Re: Clues tracking down an emulator bug (San inc crack of Airheart) BLuRry <brendan.robert@gmail.com> - 2017-02-21 10:00 -0800
Re: Clues tracking down an emulator bug (San inc crack of Airheart) Zellyn <zellyn@gmail.com> - 2017-02-21 10:10 -0800
Re: Clues tracking down an emulator bug (San inc crack of Airheart) sicklittlemonkey <nick.westgate@gmail.com> - 2017-02-21 19:11 -0800
Re: Clues tracking down an emulator bug (San inc crack of Airheart) gids.rs@sasktel.net - 2017-02-22 09:28 -0800
Re: Clues tracking down an emulator bug (San inc crack of Airheart) Zellyn <zellyn@gmail.com> - 2017-02-22 09:33 -0800
Re: Clues tracking down an emulator bug (San inc crack of Airheart) sicklittlemonkey <nick.westgate@gmail.com> - 2017-02-23 01:46 -0800
Re: Clues tracking down an emulator bug (San inc crack of Airheart) BLuRry <brendan.robert@gmail.com> - 2017-02-23 06:19 -0800
Re: Clues tracking down an emulator bug (San inc crack of Airheart) gids.rs@sasktel.net - 2017-02-23 08:44 -0800
Re: Clues tracking down an emulator bug (San inc crack of Airheart) Michael AppleWin Debugger Dev <michael.pohoreski@gmail.com> - 2017-02-23 21:03 -0800
Re: Clues tracking down an emulator bug (San inc crack of Airheart) Steve Nickolas <usotsuki@buric.co> - 2017-02-24 07:14 -0500
Re: Clues tracking down an emulator bug (San inc crack of Airheart) Zellyn <zellyn@gmail.com> - 2017-02-24 06:07 -0800
Re: Clues tracking down an emulator bug (San inc crack of Airheart) John Brooks <jbrooks@blueshiftinc.com> - 2017-02-24 07:56 -0800
Re: Clues tracking down an emulator bug (San inc crack of Airheart) Zellyn <zellyn@gmail.com> - 2017-02-24 09:55 -0800
Re: Clues tracking down an emulator bug (San inc crack of Airheart) BLuRry <brendan.robert@gmail.com> - 2017-02-24 12:45 -0800
Re: Clues tracking down an emulator bug (San inc crack of Airheart) gids.rs@sasktel.net - 2017-02-24 14:56 -0800
Re: Clues tracking down an emulator bug (San inc crack of Airheart) BLuRry <brendan.robert@gmail.com> - 2017-02-24 18:37 -0800
Re: Clues tracking down an emulator bug (San inc crack of Airheart) Richard Thiebaud <thiebauddick2@aol.com> - 2017-02-24 22:01 -0500
Re: Clues tracking down an emulator bug (San inc crack of Airheart) BLuRry <brendan.robert@gmail.com> - 2017-02-24 21:09 -0800
Re: Clues tracking down an emulator bug (San inc crack of Airheart) Richard Thiebaud <thiebauddick2@aol.com> - 2017-02-25 19:42 -0500
Re: Clues tracking down an emulator bug (San inc crack of Airheart) Richard Thiebaud <thiebauddick2@aol.com> - 2017-02-25 19:48 -0500
Re: Clues tracking down an emulator bug (San inc crack of Airheart) Peter Ferrie <peter.ferrie@gmail.com> - 2017-02-21 08:24 -0800
Re: Clues tracking down an emulator bug (San inc crack of Airheart) John Brooks <jbrooks@blueshiftinc.com> - 2017-02-23 18:29 -0800
Re: Clues tracking down an emulator bug (San inc crack of Airheart) Peter Ferrie <peter.ferrie@gmail.com> - 2017-02-21 22:57 -0800
csiph-web