On Fri, Aug 28, 2020 at 11:10 AM Paul Koning via cctalk < cctalk@classiccmp.org> wrote:
> > > > On Aug 28, 2020, at 12:15 PM, David Bridgham via cctalk < > cctalk@classiccmp.org> wrote: > > > > > >> in an online search - the CFADPTHD seems like it's close to what I'd > want, > >> except it's Compact Flash; I'd have preferred SD but I guess converting > >> their interface to IDE is more work. > > > > > > Yeah, I think Compact Flash actually uses the IDE protocol just with a > > different form-factor while SD cards are their own thing so a conversion > > from SD to IDE is a whole lot more work. > > Correct. CF cards talk to a SATA controller, you just have to adjust the > pinout. > > SD is a packet based storage device on a serial interconnect, minimally > one lane wide but it can also be four lanes (and that's typically how you > use it). Apparently it starts out in a SPI compatible mode, interesting. > Also, SD requires a rather complex handshake at power up to get to the > point where you can do I/O. > There's a number of SD to PATA adapters though where all this goo is put into a chip and you don't worry too much about it... I've used these and they are as good as the SD card you put in them... Warner
