Thanks Fabio, that's good news to hear other successful reads of the SD card. I say so, because when I was writing the code, I found a lot of confusing guides and examples of how to initialize the SD cards. I learned that not all SD cards are the same! Some are as different as Cars that use Gasoline vs Diesel vs Propane vs Electric. On the outside, they all have 4 wheels, doors, etc, but under the hood, they are quite different.
Cheers, Josh Date: Sun, 2 Nov 2014 23:54:23 +0100 Subject: RE: [N8VEM-S100:5509] Problem with ALTAIR-IMSAI 8080 CPU Board From: [email protected] To: [email protected] Hi Josh. Using a 256mb sandisk SD card here. No problems initializing and reading from the drive. Did not try writing yet, as I mostly upload binary code directly into ram using the monitor for my code experiments. On Oct 31, 2014 2:06 PM, "Crusty OMO" <[email protected]> wrote: Group, To add to Harold's post, we've been directly emailing each other, trying all the things I can think of. Here's what I know thus far. All the SD Cards are talking back but at a 1.5V range, not the 2.5V that I measure on my board. He verified there are no shorts on the SD Data out to the 74LS299 He replaced the 74LS299 I'm awaiting some (inexpensive) 1G SD Cards from ebay, when they come, I'll try them on my system and if working, send one to Harold. But while we are waiting, it would be interesting to hear back from other builders on their experiences with the SD card. Cheers, Josh Bensadon > Date: Thu, 30 Oct 2014 05:40:18 -0700 > From: [email protected] > To: [email protected] > Subject: [N8VEM-S100:5471] Problem with ALTAIR-IMSAI 8080 CPU Board > > > I just finished assembly of the S-100 8080 CPU board for my ALTAIR 8800. The > board appears to run great except that I can't get the SD card to initialize! > I have tried several different makes of cards from 256Mb to 1Gb but no luck. > > Any ideas from those who have built this board? Any feedback would be great. > > Thanks, > > Harold > > -- > You received this message because you are subscribed to the Google Groups > "N8VEM-S100" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
