From: groepaz (groepaz_at_gmx.net)
Date: 2002-04-17 12:01:36
Hello Marko, Wednesday, April 17, 2002, 11:50:24 AM, you wrote: MM> On Wed, 17 Apr 2002, groepaz wrote: >> think of a system with scpu, AR and REU for example..... MM> How would you access the 8k RAM on the Action Replay and the REU MM> simultaneously? The DMA controller of the REU sits at $dfxx, which is one MM> window to the Action Replay memory. Several years ago, I made a small MM> hardware modification that allowed a REU and an AR to be plugged in MM> simultaneously. I made the REU registers write-only, so that they didn't MM> interfere with the Action Replay, and I think I added a switch for MM> disabling the REU altogether. By enabling 256 bytes of the RAM bank of MM> the Action Replay at $df00-$dfff, I was able to access the REU. MM> Obviously, the AR RAM locations that were "underneath" the REU registers MM> were overwritten. If you are interested in the details, search for MM> "actionreuplay" in the prlink or cbmlink source code. oh yes you are right :o) i was thinking of the retroreplay anyway (which works fine together with a reu)... however, as far as i know the incompatibility isnt actually hardware-related (as in, the 32k rr-image used in an AR should work with a reu aswell..... dunno for sure though) .... maybe theres some info at ar.c64.org or sth -- Best regards, groepaz mailto:groepaz_at_gmx.net ---------------------------------------------------------------------- To unsubscribe from the list send mail to majordomo_at_musoftware.de with the string "unsubscribe cc65" in the body(!) of the mail.
This archive was generated by hypermail 2.1.3 : 2002-04-17 12:02:38 CEST