Thanks to all for your help. Heres some information I've discovered so far about SD cards:
1. Secure Data (SD) cards and Multimedia Memory Cards (MMC) cards work exactly the same way. You can do anything you can do using the other memory ports.
2. The Flash ROM version is assumed to be 2.08. Tim Wessman had mentioned something about using 2.09. You can find out by pressing ALPHA ALPHA VERSION Enter. You can and should upgrade to 2.08 according to the 50G manual. There's a procedure for doing so using a formatted memory card described in the 49G manual.
3. Objects can be stored to and recalled from SD cards as well as evaluated while stored in SD cards. Objects other than libraries can be stored on the SD card, they can be recalled from the SD card, and they can also be evaluated while on the SD card. Library objects can be stored on the SD card and recalled from the SD card, but cannot be used or evaluated on the SD card. The calculator doesn't require extra software to get this to work.
4. 512 KB memory cards have been tested to work. This person used FAT16 file format and said that FAT16 worked and FAT32 did not work - but also said that it's alright to use the calculator to format the memory card. The 50G calculator formats in FAT32 so he must have been using a calculator that formatted in FAT16. Means this information was taken from the HP-49G manual and just haphazardly copied to the HP-50G manual, I would surmise that the 49G used FAT16 file format rather than FAT32 and that FAT32 probably works just great on the 50G. The 512 KB card was the biggest card available at the time the information was written. He said that any size card can conceivably be used. Who's to say that you couldn't plug in a 2 GB card and have it work just fine using FAT32? Means DOS was probably upgraded, the read speed is probably no longer a factor.
5. You may or may not be able to remain stationed in a Port 3 directory however. By this I mean you may not be able to use CHDIR like you would while operating in Ports 0, 1 or 2. All the instructions regarding recalling and using objects stored in the Port 3 directory use the left arrow and double colons keys followed by, 3 > `Object' Enter. But, the information was written for an earlier calculator.
6. In the past, probably with the 49G and older calculators you only had a basic DOS file system that only allowed you to read its contents. So, files were stored in the memory card in DOS and were not directly accessible. You had to upload a program called SDFiler which consists of 16 files created and/or available through Tim Wessman. With the 50G there should be no need for this according the 50G manual.
7. There's a lot of confusion on this because it's simply never been properly edited from one calculator to the next and that means one thing; you guessed it, another hour of trial and error! But even though HP couldn't write a proper manual for creating a glass of lemonade, they have engineers that know how to design a calculator.
1. Secure Data (SD) cards and Multimedia Memory Cards (MMC) cards work exactly the same way. You can do anything you can do using the other memory ports.
2. The Flash ROM version is assumed to be 2.08. Tim Wessman had mentioned something about using 2.09. You can find out by pressing ALPHA ALPHA VERSION Enter. You can and should upgrade to 2.08 according to the 50G manual. There's a procedure for doing so using a formatted memory card described in the 49G manual.
3. Objects can be stored to and recalled from SD cards as well as evaluated while stored in SD cards. Objects other than libraries can be stored on the SD card, they can be recalled from the SD card, and they can also be evaluated while on the SD card. Library objects can be stored on the SD card and recalled from the SD card, but cannot be used or evaluated on the SD card. The calculator doesn't require extra software to get this to work.
4. 512 KB memory cards have been tested to work. This person used FAT16 file format and said that FAT16 worked and FAT32 did not work - but also said that it's alright to use the calculator to format the memory card. The 50G calculator formats in FAT32 so he must have been using a calculator that formatted in FAT16. Means this information was taken from the HP-49G manual and just haphazardly copied to the HP-50G manual, I would surmise that the 49G used FAT16 file format rather than FAT32 and that FAT32 probably works just great on the 50G. The 512 KB card was the biggest card available at the time the information was written. He said that any size card can conceivably be used. Who's to say that you couldn't plug in a 2 GB card and have it work just fine using FAT32? Means DOS was probably upgraded, the read speed is probably no longer a factor.
5. You may or may not be able to remain stationed in a Port 3 directory however. By this I mean you may not be able to use CHDIR like you would while operating in Ports 0, 1 or 2. All the instructions regarding recalling and using objects stored in the Port 3 directory use the left arrow and double colons keys followed by, 3 > `Object' Enter. But, the information was written for an earlier calculator.
6. In the past, probably with the 49G and older calculators you only had a basic DOS file system that only allowed you to read its contents. So, files were stored in the memory card in DOS and were not directly accessible. You had to upload a program called SDFiler which consists of 16 files created and/or available through Tim Wessman. With the 50G there should be no need for this according the 50G manual.
7. There's a lot of confusion on this because it's simply never been properly edited from one calculator to the next and that means one thing; you guessed it, another hour of trial and error! But even though HP couldn't write a proper manual for creating a glass of lemonade, they have engineers that know how to design a calculator.