Crackling on some samples. 256K Memory IC's.

[Johnny Fiction]

Just got my EII (running OS 2.2) and I'm hearing crackling when playing samples loaded from a floppy disk. The crackle corresponds to what I thought sounded like bad memory but if I record my own sample, using up all 17.6 seconds, it doesn't crackle. Any ideas? Also I popped the hood and found that my EII's Rev 1 digital board is populated with 16 MB81256 RAM IC's instead of 4164 IC's. I found a single post on the EII yahoo group that sugguests that by using 256k IC's you can outfit a REV 1 digital board with 1mb RAM like on an II+. If so, what else would I needs to upgrade to a II+?

[DARKSHINE]

if one day, could have had more memory, more than 1mb
this would be a true revolution!

[lubb]

The procedure of memory upgrading to the EII+ status is quite complicated, and is described in the  "EmulatorII1MBMemoryUpgrade".pdf.  You can download it on the Emulator II List Yahoo group (files, technical). As for the crackling in sound, perhaps you could try to run the Emulator II ZM325 Memory Test Disk... The image of the test disk could be downloaded here:

http://www.emxp.net/  (EII additional downloads...)

How to interpret the results of the memory test is described in EII Memory Test.pdf (Emulator II List Yahoo group (files, technical).


   

[dr.c]

Did you try another floppy ?
Didi you try to make one of your own ?