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RPM Test 1.0   [2016]

RPM Test 1.0 Released by :
ChristopherJam

Release Date :
7 October 2016

Type :
C64 Tool

User rating:awaiting 5 votes (4 left)   See votestatistics

Credits :
Code .... ChristopherJam
Test .... Lft of Kryo

Download :
http://csdb.dk/getinternalfile.php/152120/rpmtest_1.0.d64 (downloads: 297)
http://csdb.dk/getinternalfile.php/152128/rpmtest_1.0.prg (downloads: 157)

Look for downloads on external sites:
 Pokefinder.org


User Comment
Submitted by ChristopherJam on 8 October 2016
Groepaz; fair enough.

Still interested in people's crystal speeds, mind (the 985xxx figure)
User Comment
Submitted by Groepaz on 8 October 2016
i'd rather measure on the drive, like done in this program: https://sourceforge.net/p/vice-emu/code/HEAD/tree/testprogs/dri..

regarding actual drive speed.... the margin is surprisingly large. even when typically its quite close to 300 (+/- 0.5), loaders should be able to deal with much larger deviation, at least +/- 3, better 5, RPM
User Comment
Submitted by ChristopherJam on 8 October 2016
Thank you!

Anyone got any relative CPU speed numbers?

lft send me 985,280 for one of his drives, between 985,370 and 985,440 for another (only a drift of one in 14,000 - not too bad)
User Comment
Submitted by hedning on 8 October 2016
CJ: tested 3 1541-II and one 1571 yesterday: 1: 299.4 2: 300.6 3: 300.7 4: 300.3
User Comment
Submitted by ChristopherJam on 8 October 2016
Seriously though, I'd love to see some measurements published in the comments here; anyone?
User Comment
Submitted by ChristopherJam on 8 October 2016
hedning, do eeet! :D
User Comment
Submitted by hedning on 7 October 2016
Damn it. Now I wanna test every single drive in da house, and I will probably not be happy until I find a 300.0 one. :(
User Comment
Submitted by ChristopherJam on 7 October 2016
Thanks, Glasnost! And no, you're not :)
User Comment
Submitted by Glasnost on 7 October 2016
Very nice. Guess im not the only one working on a loader/cruncher :)
User Comment
Submitted by ChristopherJam on 7 October 2016
Note that the clock speed comparison is to the nearest 7 cycles, and the jitter in the rotation time is more like 30 cycles, so take the least significant digits with a pinch of salt.
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