276
Word
Data contents
Type of memory (** indicates empty area)
I/O memory
Reading block #7
Changing data contents
from 1234 to 0005
Read IR 009
User program
Comments
Changing the word
Reading the program or comment data
00000
00000
FUN (??)
00000FM CLR:0
XFER:1 READ:2
B00000 FMREAD
B00007 FMREAD
B00007 FMREAD
000 0000 IOM
B00007 FMREAD
001 1234 IOM
B00007 FMREAD
001 0005 IOM
B00007 FMREAD
002 IOM
B00007 FMREAD
002
B00007 FMREAD
009
B00007 FMREAD
009 2167 IOM
B00007 FMREAD
DISABLED UM
B00007 FMREAD
DISABLED CM
7-4
Program Backup and Restore Operations
Both Program Memory (UM) and DM area data can be backed-up on a stan-
dard, commercially available cassette tape recorder. Any dependable mag-
netic cassette tape of adequate length will suffice. To save a 16K-word pro-
gram, the tape must be 30 minutes long. Always allow for about 5 seconds of
blank leader tape before the taped data begins. Store only one program or
section of DM area on a single side of a tape; there is no way to identify
separate programs or DM areas stored on the same side of the tape. If a pro-
gram is too long for one side, it can be split onto two sides.
Example
Program Backup and Restore Operations
Section 7-4
