PMP Pascal specificities, keywords

PMP Pascal is a subset of the "standard" Pascal used in Turbo Pascal and Delphi, and does not comply with all rules of this standard:

• A record can only contain simple type fields (no nested record, no arrays...) and cannot have a CASE part.
• Cascaded dereferences of pointers are not allowed, e.g.: P^.X^.xyz. Only one dereference by statement.
• Nested procedures and functions are not allowed.
• There's no implementation section USES directive, making difficult to manage circular references.
• SET definition is implemented but not formally, giving compatibility with previous versions where the "pseudo-set" syntax [X, Y..Z] gives an implicit integer type and is treated as a set of bits, on which the IN, INCLUDE, EXCLUDE functions and procedures may be applied as they may be used on any integer-typed variable.
• Strict type checking may be disabled, automatic type conversion may be used.

Also:

• PMP doesn't use a data stack. That means that all parameter passing and local variables are static. This is faster than using a stack but uses more RAM memory. Some mechanisms are implemented for memory sharing when possible.

PMP keywords:

The following keywords are implemented and / or reserved by PMP for the Pascal language and extensions (bold faced if PMP-specific and not in standard TP/Delphi Pascal):

ABS4, ABSOLUTE, AND, ARCCOS5, ARCSIN5, ARCTAN5, ARRAY, ASM, ASSERT, ASSIGN, AT, BAUD, BCDBIN, BEGIN, BIGINT, BIGWORD, BINBCD, BITS, BOOLEAN, BREAK, BY, BYTE, BYTES, CARD, CASE, CHAR, CHR, CLR, CLRWDT, CONFIG, CONST, CONTINUE, COPY, COS5, DEC, DECLARED, DEFINED, DEFINED_VALUE, DELAY, DELAY_CY, DELAY_MS, DELAY_NS, DEPRECATED, DISPOSE5, 6, DIV, DO, DOUBLE5, DOWNTO, DWORD, EACH, EEPROM, EEREAD, EEWRITE, ELSE, ELSIF, END, ERROR, EXCLUDE, EXIT, EXP5, EXPERIMENTAL, EXTERNAL, FALSE, FILL, FOR, FORWARD, FP_CLR5, FP_IOP5, FP_OVR5, FP_UND5, FREEMEM5, 6, FREQUENCY, FUNCTION, GETMEM5, 6, GET_LAT, GET_PIN, GET_PORT, GET_TRIS, GET_WPU, GOTO, HELPER1, HEX, HI, HIGH, HILONGWORD, HIWORD, IDLOC, IDLOCS, IF, IMPLEMENTATION, IN, INC, INCLUDE, INITIALIZATION, INLINE3, INPUT, INSTR_TIME, INSTR_TIME_NS, INT8, INT16, INT32, INT64, INTEGER, INTERFACE, INTERRUPT, IS_SFR, LENGTH, LIBRARY1, LN5, LO, LOCASE, LOLONGWORD, LONGINT, LONGWORD, LOOP, LOW, LOWORD, MAX, MAXBIGINT, MAXBIGWORD, MAXINT, MAXLONGINT, MAXWORD, MINBIGINT, MINBIGWORD, MININT, MINLONGINT, MINLONGWORD, MINWORD, MEMAVAIL(5,6), MIN, MOD, MOD16, MOD16S, MOD32, MOD8, MOVE, MUL16, MUL18, NEW5, 6, NIL, NOP, NOT, ODD, ODDP, OF, ON, OPERATOR1, OPTION, OR, ORD, OUT, OUTPUT, OVERLOAD3, PACKED1 , PI5, POINTER, POW5, PRED, PRIVATE1, PROCEDURE, PROGRAM, PROJECT_VERSION_BUILD, PROJECT_VERSION_MAJOR, PROJECT_VERSION_MINOR, PROJECT_VERSION_REVISION, PROJECT_VERSION_STRING, PROPERTY1, PROTECTED1, PUBLIC1, PWM,  RANDOM, RANDOMIZE, READ, READLN, REAL5, RECORD, REGISTER1, REPEAT, RESET, RETURN, ROL, ROM, ROMABLE, ROR, ROUND5, SELF, SET, SFR, SFR_READ, SHL, SHLB, SHORTINT, SHR, SHRB, SIN, SINGLE5, SIZEOF, SLEEP, SQR4, SQRT5, STR, STRING, SUCC, SWAP, TAN5, TASK3, TASK_CLRSEM3, TASK_IDLE3, TASK_INIT3, TASK_PERIOD3, TASK_PRIORITY3, TASK_SETSEM3, TASK_START3, TASK_STOP3, TASK_TERMINATE3, TASK_TERMINATED3, TASK_TICK3, TASK_WAITFOR3, THEN, TO, TOGGLE, TRIS, TRUE, TRUNC5, TYPE, UINT8, UINT16, UINT32, UINT64, UNIT, UNTIL, UPCASE, USES, VAL, VAR, VERSION, VERSION_BUILD, VERSION_MAJOR, VERSION_MINOR, VERSION_REVISION, VERSION_STRING, VOLATILE, WHILE, WITH, WORD, WRITE, WRITELN, XOR.

• Keywords are always reserved words and can never be redefined, in whatever context.

1:        For future compatibility of source codes, some keywords that are used in other Pascal implementations such as TP or Delphi are already reserved even if not implemented. Even if not reserved by PMP, it should be avoided to use such keywords as identifiers.

2:        Not implemented for all processors.

3:        Same as 1 but the implementation is already scheduled in a future version.

4:        Limited to integer types for processors other than PIC16 and PIC18.

5:        Only for PIC16 and PIC18 processors.

6:        Not for PIC16 non-enhanced processors.