HP-50G screen black at startup...

[Joe Horn]

Here's the BACKUP program which you should run every time you change the configuration of your 50g in a significant way. I also run it right before messing around with System RPL or other forms of couch hacking, since it makes recovery from MEMORY LOST easy. I keep it in Port 2 but you can keep it in main memory or assigned to a key or in your custom menu or anyplace you please. It backs up main memory and your flags into Port 2.

Code:

'BACKUP'
<< :2:BKUP DUP PURGE ARCHIVE 1537 RCLF :2:FLGS DUP PURGE STO .1 BEEP 0 TMENU >>

Here's the BACKDOWN program which you should keep in Port 1. It restores your 50g from the backup created by the above BACKUP program. To run it after a MEMORY LOST, just press left-shift APPS [FILES], 1, highlight the BKDN program, and press EVAL.

Code:

'BKDN'
<< :2:FLGS EVAL STOF :2:BKUP RESTORE >>

If you have a very fast SD card installed, and if your backups are large, backing up will be faster if you change all the :2:'s above to :3:'s. The 1537 .1 BEEP is not necessary but I like it. 1537 was my PPC membership number.