Hallo Rainer, > Btw., if there are special feature requests or ideas for > improvement regarding future versions of GODIL, let me know > and I'll happily forward it to Mike Randelzhofer, A "GODIL for dummies" book. And I'm not kidding. This device looks good enough for the ideas I have. Although I'm an engineer, I date way back from the 5V TTL-age. It is if you introduce a stone-age man into the iron-age; he will recognise an axe when he sees it and he will know ho to uses the device, but how to make one himself is a different question. In my case I had problems with the different voltages but if I understand Nate correctly, the device can be ordered with levelshifter IC's so I don't need the buffers I proposed at all. But I never programmed an FPGA, only a CPLD once. Some guidance would be fine. It does not have to contain a course in VHDL or Verilog but examples would be welcome, just to make you familiar with the device and special features like timers or what so ever. About ideas, one idea I have for ages is a SCPU-alike replacement for the 6510. Having 48 pins, the 6510 only needing 38, means we have 48 for our own purposes. Just brainstorming: - another 8 for the extra address lines - one for telling the C64 to do nothing - one free The Godil is connected to the C64 through buffers. The moment the CPU goes beyond the 64 KB border the extra line tristates the buffers (including one for the R/W line). Resistors pull the busses (H). The C64 no believes the CPU is reading address $FFFF, IMHO a save escape address. As the GODIL cannot disturb the VIC in any way, the extra line can also disable the RDY and AEC signal towards the GODIL. In this state it can even run at an higher clock speed. My personal interest: I want to use the extra address space to connect PC-ISA cards (and later, if I find out how, PCI cards). I can use the last extra pin to tell the ISA-card whether it is an I/O or an memory operation. But not needing 16 MB, I could do with just 1 MB and having another 4 pins for future use. The ISA-card brings me to another possible improvement for the GODIL: extra I/O pins. At least four extra would enable me to use the 16-bits databus of the ISA-card in an easier way. But this is sheer personal interest (read: leziness) :) -- ___ / __|__ / / |_/ Groetjes, Ruud \ \__|_\ \___| URL: Ruud.C64.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 it's 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 listReceived on 2010-02-05 08:00:10
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