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HARSFEN0602
If the compilation flag is zero, program is ready.
Other values indicate not ready program.
The command CP sets the compilation flag to –1.
The Compilation Flag is checked when:
DL command – If the flag is zero, DL will not execute (CP must be issued before DL).
XQ command – If the flag is nonzero, the command returns with PROGRAM_NOT_READY
error
CC inquiry – Returns 1 if the flag is zero, otherwise 0.
The compilation flag is set to zero at a CC=xxxx command, if xxxx matches the 32 bit program checksum,
to the length stated at the TOC.
16.5.3 The Virtual Machine Code Segment
The virtual code segment holds consecutively the virtual machine code as compiled.
16.5.4 The Text Backup & Compiler data segment
The text backup segment holds the program text and the compiler data.
The first 80 characters are dedicated to the compiler version.
Characters [81.. End of segment] include the program text and line number information.
The compiler version is a zero terminated string, including:
- Compiler Version.sub.subsub, something like 15.2.1
- Op-codes version: same method as compiler version.
- Data of release, something like 17-Dec-2002
- Target: Release/Eng/Special
- Any general comment.
In each program line, the corresponding program counter value is the first word (unsigned short). If the first
word is 0xFFFF, the text line contains no executable code. For example, the code
mo=1;
** This is a comment
mo=0;um=5;
will be written as
0x0246mo=1;<CR>0xFFFF**This is a comment<CR>024Cmo=0;um=5;<CR>....
supposing the VAC code for mo=1 is at PC=0246 and for mo=0 is at PC=0x24C, when PC is an address in
the serial flash relatively to the start of the code segment of the user code partition.
16.5.5 The Function Symbol Table
The function symbol table states what functions and labels are accessible through the user program. The
symbol table does not include any information on system functions. The first 34 bytes of the function symbol
table is devoted to statistics:
- Number of functions in the table (signed short)
For each function, the following data 34 bytes record is set:
Name (24 bytes long, every character takes two bytes - signed short, unused tail filled
with zeros)
Address in the Code Segment (2 bytes – unsigned short)
Type (2 bytes, signed short – 0 for label, 1 for auto routine, 2 for user function)
Number of input arguments (2 bytes, signed short, for functions only)
Number of output arguments (2 bytes, signed short, for functions only)
LabelProcRef (2 bytes, signed short). If this member is local label, this field contains
index of the function inside which this label resides. For global label this field is equal
to –1. For user function this field is not relevant and equal to -1.
The byte length of the function symbol table is 34 * (number of functions+1).