| F000
to F02D |
Command word table and action addresses.
Includes PLOT, MOVE, DRAW, CLEAR, DIM, OLD, WAIT and [. |
| F02E
to F04A |
An array pre-test, looks for two
consecutive characters being the same, thus identifying
an array. |
| F04B
to F082 |
Interpreter for the above command words.
jumps to the appropriate action addresses. |
| F08B
to F0AD |
A subroutine called by F02E to pull the
array start address from the table of array addresses (as
LSB=2EB,Y and MSB=306,Y) and places it on the workspace
stack. |
| F0AE
to F140 |
Executes DIM command as follows:
F0AE - Simple string dimension: set simple variable
values (lower 2 bytes) to next free RAM space, and points
DIM vector at (23) to the next available space.
F0D7 - set up array dimensions. Sets the appropriate
array variable pointer (see F08B)., and points DIM vector
to next available space.
F119 - check that DIM vector has not exceeded available
RAM, and cause error 30 if it has.
F131 - take action on additional items separated by
commas in the same DIM statement. |
| F141
to F14B |
Executes the RUN command. Sets DIM
vector at (23) equal to TOP, then jumps to CE83. This is
the correct GO address for BASIC programs that use a DIM
statement. CE86 may also be used if there are no DIM
commands. |
| F14C
to F154 |
Executes the WAIT command (uses FE66). |
| F155
to F290 |
Assembler data and look-up tables. |
| F291
to F29B |
A subroutine to fetch the next non-space
character in the BASIC statement being interpreted. It
uses 5,(?3) as a pointer, and returns with ?3 pointing at
the first non-space character. |
| F2A1
to F375 |
Executes the "[" command
(start assembler).
F2A3 - deals with "}".
F32E - deal with assembler labels.
F360 - deal with assembler REMs (/).
F36B - deal with statement separator (;) |
| F376
to F37D |
A subroutine to print the contents of
the accumulator as two hex characters followed by a
space. Used by the assembler listing display. |
| F37E
to F38D |
Byte-printing routine called by F376
above. |
