Re: 6569 luminances

From: Gerrit Heitsch <>
Date: Tue, 14 May 2013 09:18:07 +0200
Message-ID: <>
On 05/14/2013 01:08 AM, wrote:
> On 2013-05-04, at 18:09, Gerrit Heitsch wrote:
>>> I had a moment of inspiration today (after Michau asked about the SX ROMs) to check how it is done in the SX (I thought it was like in the older 64s) and.. it occured that there are actually /two/ crystals piggybacked one on another and just three 74LS chips next to the passive stuff on the daughterboard called "clock unit".
>> Would it be possible to post the frequencies of the 2 crystals and what 74LSxxx are on the clock board?
> One is phicolor (17.734 on PAL) the other one is dotclock (7.8819 on PAL )frequency.

Ouch... It's already a bit of a pain to get your hands on a 17.73447 MHz 
crystal, but where do you get a 7.8819 MHz one?

Ok, if you had a 8701 around, you could use that one.


       Message was sent through the cbm-hackers mailing list
Received on 2013-05-14 08:00:03

Archive generated by hypermail 2.2.0.