The BBC and Master Computer Public Domain Library

B71D GOTO

Submitted by Steve Fewell

Description:

Call routine &B82A to get the Line Number after the GOTO keyword, Issue 'No such line' error if the Line doesn't exist
and set &3D-&3E to the start address of the specified Program Line.
Call routine &9BA6 to check that the statement terminates correctly with a ':', '<cr>' or 'ELSE-token' character,
issuing 'Syntax error' if it doesn't.

If the TRACE flag (location &20) is not zero, then call routine &9C4B to check that TRACE is on, and that the
Line Number (locationed in the IWA) is in the specified TRACE range, if it is then the Line number will be displayed on
the screen.

Set BASIC Text Pointer A to the start of the specified program line, by:

* [&B72A] Set #&0A (the BASIC Text Pointer A Offset) to 4 (a pointer to the first character of the

    Program Line (skipping the preceding Line number (3 bytes) and Next Line offset (1 byte) values).

* Set &0B (the BASIC Text Pointer A LSB) to the Line Number Start Address LSB value at location &3D

* Set &0C (the BASIC Text Pointer A MSB) to the Line Number Start Address MSB value at location &3E

Disassembly for the GOTO routine