Data General ALGOL Notes
		========================

Fixes
-----
	- MOVSTR now correctly updates string size
	  (MOVES.WH[SR])
	- ERROR routine now creates correct string specifier
	  (ERROR.WH[SR])

Enhancements
------------
	- added SYSTEM procedure (compatible with DG/L)
	- added XCT1 procedure (compatible with DG/L)


Comments and Notes
------------------
	- Compiler accepts /* ... */ as comment in addition to COMMENT
	  statement;
	- DG CHAIN procedure error handling is bad
	- FATAL or RT IO error not Eclipse or MV compatible(?)
	- ALGOL compiler source code characters have even parity in some
	  places which confuses ASM or MAC assembler
	  (old RDOS stripped parity, RDOS > ~7.1 kept parity!)
	- DG 2.08 is 2.10 octal, DG set it in wrong radix
	- ALGOLWH.LB created with ERROR, MOVESTR, SYSTEM and XCT1 updates


Maintenance Notes
-----------------
	- SYSTEM.WH   [SR] created
	- XCT1.WH     [SR] created
	- MOVES.WH    [SR] created
		main string variable current size not properly updated
		MOVES.SR
		USGT should be USGE
	- ERROR.WH    [SR] created
		bad parameter specifier for string (2 vs 3 word)
	- SYSTEST.WH  [AL] created
	- XCT1TEST.WH [AL] created


Possible projects
-----------------
	- DG/L-harmony (RDOS)
		GCHANNEL [ ( ERROR_LABEL ) ]
		GCINPUT  [ ( ERROR_LABEL ) ]
		GCOUTPUT [ ( ERROR_LABEL ) ]
		XCT2( INSTRUCTIONR8P2, AC0, AC1, AC2, AC3, CARRY [, SKIP_LABEL] )
		ARGCOUNT()
		ERETURN( ERROR_NUMBER [, ERROR_LABEL ] )
		SYSRETURN [ ( ERROR_LABEL ) ]
		READCHAR  [ ( ERROR_LABEL ) ]
		GETCHAR   [ ( ERROR_LABEL ) ]
		PUTCHAR( character [, ERROR_LABEL ] )
		OEBL
		ODIS
	- determine side-effects (if any) of ANOP definition in ALGOL code
		Eclipse: 100010 (octal)
		MV:      100011 (octal)
	- Multi-tasking (woohoo!)
	- save/trace compiler intermediate file, separate tree-walker program



2022-Nov-18, bkr