Hello GJPAA, Tuesday, December 10, 2013, 6:40:12 PM, you wrote: > Hallo Jim, >> Since this group is probably not interested in aftermarket cart discussions... > I'm always interested in a technical discussion. >> to discuss possible extras that might be of interest in a 6551 interface? > I don't have any datasheets of the 6551 at hand right now but isn't > the 16450/16550 able to archive higher speeds? With a CPLD you can > now easily generate the Intel signals needed for this IC. I've seen word of implementations where the 6551 was just overclocked via a different crystal to higher rates. Since one of the main bottlenecks in the 8bit world is processor speed, emulating a FIFO buffer (akin to the 16byte FIFO in the NEC 16550) would be an interesting exercise. Since the interrupt structure of any programs to USE it would need to be rewritten (to set thresholds, timeouts/flushes, and multiple-byte transfers per interrupt cycle, and access the additional registers necessary) - it would largely be an academic endeavor, unless it had sufficient utility to establish a standard. It could be fun, though :) I always thought that the 6551 ACIA chip was the ONE thing missing from the C128. Julian > Met vriendelijke groet / with kind regards, > Ruud Baltissen > www.Baltissen.org > De informatie in dit e-mailbericht is vertrouwelijk en uitsluitend bestemd voor de > geadresseerde. Wanneer u dit bericht per abuis ontvangt, verzoeken wij u contact op te > nemen met de afzender per kerende e-mail. Verder verzoeken wij u in dat geval dit > e-mailbericht te vernietigen en de inhoud ervan aan niemand openbaar te maken. > Wij aanvaarden geen aansprakelijkheid voor onjuiste, onvolledige dan wel ontijdige > overbrenging van de inhoud van een verzonden e-mailbericht, noch voor daarbij > overgebrachte virussen. > APG Algemene Pensioen Groep NV is gevestigd te Heerlen en is ingeschreven in het > handelsregister van de Kamer van Koophandel Limburg onder nummer 14099617 > The information contained in this e-mail is confidential and may be privileged. > It may be read, copied and used only by the intended recipient. > If you have received it in error, please contact the sender immediately by > return e-mail; please delete in this case the e-mail and do not disclose its > contents to any person. We don't accept liability for any errors, omissions, > delays of receipt or viruses in the contents of this message which arise as a > result of e-mail transmission. > APG Algemene Pensioen Groep NV is registered in the trade register of the Chamber > of Commerce Limburg, The Netherlands, registration number: 14099617 > Message was sent through the cbm-hackers mailing list -- Best regards, Julian mailto:jp@digitaltapestries.com Message was sent through the cbm-hackers mailing listReceived on 2013-12-10 12:00:06
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