Am Dienstag, 22. März 2022, 18:13:04 CET schrieb Gerrit Heitsch: > On 3/22/22 17:47, ruud_at_Baltissen.org wrote: > > Hallo Claudio, > > > >> Recently, clones of the 1581 electronics have surfaced, and I wondered > >> about how much of the electronics can be put on FPGA/CPLD and what not. > > > > Just have a look at the Ultimate1541 and you have your answer: the > > sky is the limit. > > Personally I prefer projects without PLDs and/or FPGAs for various > > reasons: > > - most of the times it means SMD soldering and pins very very close > > to eachother > > - not everybody can program them and most probably the need socket > > converters > > - most of the newer CPLDs/FPGAs are non 5 Volt meaning voltage > > shifters are needed, thus extra parts, etc., etc., etc. > > > >> Can the standard PCB of a 1541 be replaced by a newer, designed from > >> scratch one, while maintaining hardware compatibility, when managing the > >> drive mechanism? > > > > Just two words: why not? Have a look what is needed to turn a 1541 > > > > into a much better machine: > > http://vic-20.de/x1541/hardware/petram.html > > > > What about adding 1 MB of SRAM and a SD interface? Load the RAM with > > the content of a floppy and loading a 200 block from RAM is a matter > > of seconds. (Sorry, I forgot the board that did that already in the > > '80s) > > Board size? when using a 1541, thus not the 1541-II, you have room > > enough for the extra goodies. > > And if you want to build the 1541 without any custom chips, take a look > at the old 1541 with the longboard or the Oceanic OC-168. That gets you > the basics, then just add whatever you need. There is a big WHY? though - since it is the drive mechs and the heads in particular that are dying and which cant be replaced. -- http://hitmen.eu http://ar.pokefinder.org http://vice-emu.sourceforge.net http://magicdisk.untergrund.net Do y'all remember, before the internet, that people thought the cause of stupidity was the lack of access to information? Yeah. It wasn't that.Received on 2022-03-22 20:00:02
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