Incompatibility of 2-char constants 'XY' with MRAS

[GmEsoft]

Incompatibility of 2-char constants 'XY' with MRAS

Hi George,

I observed this incompatibility between ZMAC in --mras mode and MRAS:

MRAS considers 2-char constants XY as ( 'X' << 8 ) | 'Y'. ZMAC converts them to 'X' | ( 'Y' << 8 ).
So, with MRAS, X goes to the MSB and Y goes to the LSB. With ZMAC it's reversed.

Example TEST2CHR/ASM:

	ORG	3000H
@DSPLY	EQU	0AH		; SVC display msg @HL
START	LD	HL,'ko'		; Test message
	LD	(TEST),HL	;
	LD	HL,MSG
	LD	A,@DSPLY	; Display it
	RST	28H		;
	LD	HL,0		; exit OK
	RET			; done
MSG	DB	'MRAS Test result: '
TEST	DB	'??',0DH
	END	START

With MRAS:

MRAS TEST2CHR +L=TEST2CHR -GC

Output:

MRAS Test result: ok

Listing:

3000           00001         ORG     3000H
000A           00002 @DSPLY  EQU     0AH             ; SVC display msg @HL
3000  216F6B   00003 START   LD      HL,'ko'         ; Test message
3003  222230   00004         LD      (TEST),HL       ;
3006  211030   00005         LD      HL,MSG
3009  3E0A     00006         LD      A,@DSPLY        ; Display it
300B  EF       00007         RST     28H             ;
300C  210000   00008         LD      HL,0            ; exit OK
300F  C9       00009         RET                     ; done
3010  4D       00010 MSG     DB      'MRAS Test result: '
      52 41 53 20 54 65 73 74
      20 72 65 73 75 6C 74 3A
      20 
3022  3F       00011 TEST    DB      '??',0DH
      3F 0D 
3000           00012         END     START

With ZMAC:

zmac --mras --od . --oo cmd --oo lst test2chr.asm

Output:

MRAS Test result: ko

Listing:

   1:     -	3000          		ORG	3000H
   2:     -	000A          	@DSPLY	EQU	0AH		; SVC display msg @HL
   3:    0+10	3000  216B6F  	START	LD	HL,'ko'		; Test message
   4:   10+16	3003  222230  		LD	(TEST),HL	;
   5:   26+10	3006  211030  		LD	HL,MSG
   6:   36+7	3009  3E0A    		LD	A,@DSPLY	; Display it
   7:   43+11	300B  EF      		RST	28H		;
   8:   54+10	300C  210000  		LD	HL,0		; exit OK
   9:   64+10	300F  C9      		RET			; done
  10:     -	3010  4D524153	MSG	DB	'MRAS Test result: '
	              20546573
	              74207265
	              73756C74
	              3A20
  11:     -	3022  3F3F0D  	TEST	DB	'??',0DH
  12:     -	3000          		END	START