pouët.net

Call Oric Now! by Defence Force [web]

This version of Call Now! is exactly 32 bytes long, including all the valid Oric Tape Headers.

The source code is actually: 0LIST:.CALL NOW!
I patched the value of the "." and replaced it by the value 0C which is the code to clear the screen, so the final binary is actually that:

|---------- Header -------------------------------|-------- Program  -----------|-- Footer --|
16 16 24 00 00 00 80 05 13 05 01 00 20 00 11 05 00|00 BC 3A 0C BF 20 4E 4F 57 C0|00 00 00 00

So the program is actually the follow sequence:

00        Line number
BC        LIST (instruction from BASIC)
3A        :
0C        Erase screen
BF        CALL (instruction from BASIC)
20        the space
4E 4F 57  NOW
C0        !

What happens is that the program autoruns, encounters the LIST instruction, so it shows the source code on screen, then the C0 character deletes everything, and all that remains is the CALL NOW! message.