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'

ON 20020603@8:08:46 PM at page:
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ON 20020604@10:43:41 AM at page:
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BJM-bigfoot-486 Brendan James Moran edited the page

ON 20020624@12:06:15 PM at page:
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BJM-bigfoot-486 Brendan James Moran added 'Code:

#if 0
+-------------------------------------------------+
|    Register select macros by Brendan Moran      |
|      For use by whoever feels so inclined       |
|          relevant email may be sent to          |
|            ansi_annirak AT yahoo.com            |
+-------------------------------------------------+
#endif



setRB0	macro			;set register bank 0
#ifndef RB0			;ensure that the proper bank indicator is defined
 #define RB0
#endif
#ifdef RB1
 #undefine RB1
#endif
#ifdef RB2
 #undefine RB2
#endif
#ifdef RB3
 #undefine RB3
#endif
	bcf	STATUS,RP0
	bcf	STATUS,RP1
	endm

setRB1	macro			;set register bank 1
#ifdef RB0
 #undefine RB0
#endif
#ifndef RB1
 #define RB1
#endif
#ifdef RB2
 #undefine RB2
#endif
#ifdef RB3
 #undefine RB3
#endif
	bsf	STATUS,RP0
	bcf	STATUS,RP1
	endm

setRB2	macro			;set register bank 2
#ifdef RB0
 #undefine RB0
#endif
#ifdef RB1
 #undefine RB1
#endif
#ifndef RB2
 #define RB2
#endif
#ifdef RB3
 #undefine RB3
#endif
	bcf	STATUS,RP0
	bsf	STATUS,RP1
	endm

setRB3	macro			;set register bank 3
#ifdef RB0
 #undefine RB0
#endif
#ifdef RB1
 #undefine RB1
#endif
#ifdef RB2
 #undefine RB2
#endif
#ifndef RB3
 #define RB3
#endif
	bsf	STATUS,RP0
	bsf	STATUS,RP1
	endm
;---------------------------------------------------------------------------------
op2	macro	opcode,opr1,opr2,rb	;macro for use with double operand opcodes
#if rb == 0				;specify the opcode, first operand, second
 #ifndef RB0				;operand and target register bank
  ERROR "Register bank error"
 #endif
#endif
#if rb == 1
 #ifndef RB1
  ERROR "Register bank error"
 #endif
#endif
#if rb == 2
 #ifndef RB2
  ERROR "Register bank error"
 #endif
#endif
#if rb == 3
 #ifndef RB3
  ERROR "Register bank error"
 #endif
#endif

	opcode	(opr1^(rb*0x80)),opr2	;xors the two MSBs with the register bank value
					;so that if the wrong bank has been selected, the
	endm				;assembler will generate an error.

;---------------------------------------------------------------------------------

op1	macro	opcode,opr1,rb		;macro for use with single operand opcodes
#if rb == 0				;specify the opcode, first operand, and
 #ifndef RB0				;target register bank
  ERROR "Register bank error"
 #endif
#endif
#if rb == 1
 #ifndef RB1
  ERROR "Register bank error"
 #endif
#endif
#if rb == 2
 #ifndef RB2
  ERROR "Register bank error"
 #endif
#endif
#if rb == 3
 #ifndef RB3
  ERROR "Register bank error"
 #endif
#endif

	opcode	(opr1^(rb*0x80))	;xors the two MSBs with the register bank value
					;so that if the wrong bank has been selected, the
	endm				;assembler will generate an error.
'