Hi, On Mon, May 07, 2012 at 06:25:29PM +0200, Michał Pleban wrote: > >I also thought about it, since I've started to play with interfacing with SD > >card on SPI bus, currently only through PC parallel port (to "play" with it > >and some studies for myself), but I'd use a microcontroller with dedicated > >SPI capability (btw, I also thought about using ECN28J60 which is a 28-pin > >SPDIP ethernet controller with SPI bus - it's really cheap, and not so slow, > >even 20MHz SPI connection is OK for it -, maybe easier to play with it for a > >hobby user like me, without heavy SMD, etc soldering and PCB designing > >capaibilities). One question came into my mind however: I would hate to use > >an EPROM just for bootstrap. It would be interesting to see this works: > > Well, I don't want to use any microcontroller for the simple reason > that 6502 is the only processor I know how to program :-P I can understand you :) My only reason: interfacing with SPI bus is not so fast if some "bit banging" is used, and I wanted decent performance mainly because of the SPI based ethernet controller. However I am thinking on this still, as maybe serial shift register of the CIA can help here to speed things up a bit. In my idea uC is only needed to have some kind of fast SPI/serial converter (and also to "cache" some data inside the uC's memory still C64 is ready to process it, etc). However as far as I can see, the goals are a "bit" different, you may not need this at all. Message was sent through the cbm-hackers mailing listReceived on 2012-05-07 17:00:59
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