Interesting Sharp PC-1500 behavior

[robve]

(02-07-2023 04:42 PM)Jeff_Birt Wrote:  10 PRINT "LINE 10"
20 PRINT "LINE 20"
30 END
RUN it, and when "LINE 10" is displayed type "PRINT 5+5" (no quotes) and hit ENTER. Then hit ENTER again.

What happens? Does it surprise you?

This is normal and expected:

RUN<ENTER>
LINE 10
PRINT 5+5<ENTER>
10
<ENTER>
LINE 20

The reason is that WAIT is enabled by default and PRINT waits for you to press <ENTER>. But you can enter expressions instead, to see what values the variables have, which is great for debugging. Then press <ENTER> to continue the program. Press <UP> and hold to see the BASIC line executing. Pretty much all SHARP PC work this way. Use WAIT 0 in your program to remove the WAIT state.

Press <CA> (<SHIFT> <CL>) to reset the state back to "normal" RUN MODE. This is why <CA> does a little bit more than <CL>.

- Rob