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- Path: newsgate.sps.mot.com!seneca!jeffh
- From: jeffh@oakhill-csic.sps.mot.com (Jeff Hunsinger)
- Newsgroups: comp.sys.cbm
- Subject: C64 Acceleration
- Date: 19 Mar 1996 19:32:00 GMT
- Organization: Motorola Semiconductor Products Sector
- Distribution: world
- Message-ID: <4in23g$7ug@newsgate.sps.mot.com>
- Reply-To: jeffh@oakhill-csic.sps.mot.com
- NNTP-Posting-Host: seneca.sps.mot.com
-
- I'm curious about how the various C64 acceleration products work. From what I've
- been able to gather, they are usually pretty much complete 6502 systems on a
- board that plugs into the expansion port. The one system I remember seeing had
- on-board RAM and ROM. It ran at about 4 MHz, but was able to slow down somehow
- to access the C64 peripheral chips, like the CIA, SID, and VIC.
-
- The question is: how is the processor slowed? Is there just an address decoder
- triggering a clock select line?
-
- I'm not out to design my own accelerator, but I am designing a board for my own
- use that uses a similar processor. My processor will be running at 4-8 MHz, but
- needs to access peripheral chips that are only capable of running at 1-2 MHz.
-
- Thanks for your help.
-
- Jeff
-
-
-