The BBC and Master Computer Public Domain Library

ABCF EOF

Submitted by Steve Fewell

Description:

Call routine &BA4A to check that the next character at the BASIC Text Pointer B location (&0B-&0C) is a '#'-character.
If not then issue 'Missing #' error message. Evaluate the expression after the '#' [Type mismatch error if string value
found], and set Y to the number found after the '#' character (this is the file channel number).

Set X to the file channel number (in A).
Call the Operating System OSBYTE #&7F function to check for the end-of-file for the file currently open on channel
number X.
If X is returned as zero then the end-of-file has not been reached, so exit with IWA = 0; otherwise, exit with IWA = TRUE
(&FFFFFFFF), as the end-of-file has been reached.

Disassembly for the EOF routine