Tom_Klok@mindlink.UUCP (Tom Klok) (02/10/91)
> umhild11@ccu.umanitoba.ca writes: > > My request is this:would some kind soul find this article and copy out the > table for me, or failing that, does anyone know the equations which will give > me the correct values for these tables? From the Hardware Manual: The POKEY counters can be clocked at three different frequencies: 1.78979 MHz 63.9210 KHz 15.6999 KHz The Normal Formula for output frequency is: Fout = Fin / 2N where N = the binary number in the frequency register (AUDF), plus 1 (N = AUDF + 1). The Modified Formula should be used when Fin = 1.79 MHz and a more exact result is desired: Fin Fout = ------------- 2 (AUDF + M) where M = 4 if 8 bit counter (AUDCTL bit 3 or 4 = 0) M = 7 if 16 bit counter (AUDCTL bit 3 or 4 = 1) -- So, in your case, you'd want to use the formula 1.78979 x 10^6 Fout = -------------- Hz 2 (AUDF + 7) Hope that helps. Tom Klok a344@mindlink.UUCP | "What, me hurry?" -- Alfred E. Von Neuman
deg@sei.cmu.edu (Donald Griffin) (02/23/91)
You were looking for the 16-bit sound table from a COMPUTE! magazine. While I don't want the responsibility for typing it in (with errors!), I do have the article in question (page 214 in the March, 1983 issue), and will be happy to mail you a copy if you wish to provide an address. Let me know if I can be of help. Don Griffin