?? datapage.c
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/*--------------------------- _LOAD_FAR_16 --------------------------------
This runtime routine is used to access paged memory via a runtime function.
It may also be used if the compiler option -Cp is not used with the runtime argument.
Arguments :
- offset part of an address in the Y register
- page part of an address in the B register
Result :
- value to be read in the Y register
- all other registers remains unchanged
- all page register still contain the same value
--------------------------- _LOAD_FAR_16 ----------------------------------*/
#ifdef __cplusplus
extern "C"
#endif
#pragma NO_ENTRY
#pragma NO_EXIT
#pragma NO_FRAME
void NEAR _LOAD_FAR_16(void) {
#if USE_SEVERAL_PAGES
__asm {
PSHX ;// save X register
__PIC_JSR(_GET_PAGE_REG)
BEQ L_NOPAGE
PSHA ;// save A register
LDAA 0,X ;// save page register
STAB 0,X ;// set page register
LDY 0,Y ;// actual load, overwrites address
STAA 0,X ;// restore page register
PULA ;// restore A register
PULX ;// restore X register
RTS
L_NOPAGE:
LDY 0,Y ;// actual load, overwrites address
PULX ;// restore X register
RTS
}
#else /* USE_SEVERAL_PAGES */
__asm {
PSHA ;// save A register
LDAA PAGE_ADDR ;// save page register
STAB PAGE_ADDR ;// set page register
LDY 0,Y ;// actual load, overwrites address
STAA PAGE_ADDR ;// restore page register
PULA ;// restore A register
RTS
}
#endif /* USE_SEVERAL_PAGES */
}
/*--------------------------- _LOAD_FAR_24 --------------------------------
This runtime routine is used to access paged memory via a runtime function.
It may also be used if the compiler option -Cp is not used with the runtime argument.
Arguments :
- offset part of an address in the Y register
- page part of an address in the B register
Result :
- value to be read in the Y:B registers
- all other registers remains unchanged
- all page register still contain the same value
--------------------------- _LOAD_FAR_24 ----------------------------------*/
#ifdef __cplusplus
extern "C"
#endif
#pragma NO_ENTRY
#pragma NO_EXIT
#pragma NO_FRAME
void NEAR _LOAD_FAR_24(void) {
#if USE_SEVERAL_PAGES
__asm {
PSHX ;// save X register
__PIC_JSR(_GET_PAGE_REG)
BEQ L_NOPAGE
PSHA ;// save A register
LDAA 0,X ;// save page register
STAB 0,X ;// set page register
LDAB 0,Y ;// actual load, overwrites page of address
LDY 1,Y ;// actual load, overwrites offset of address
STAA 0,X ;// restore page register
PULA ;// restore A register
PULX ;// restore X register
RTS
L_NOPAGE:
LDAB 0,Y ;// actual load, overwrites page of address
LDY 1,Y ;// actual load, overwrites offset of address
PULX ;// restore X register
RTS
}
#else /* USE_SEVERAL_PAGES */
__asm {
PSHA ;// save A register
LDAA PAGE_ADDR ;// save page register
STAB PAGE_ADDR ;// set page register
LDAB 0,Y ;// actual load, overwrites page of address
LDY 1,Y ;// actual load, overwrites offset of address
STAA PAGE_ADDR ;// restore page register
PULA ;// restore A register
RTS
}
#endif /* USE_SEVERAL_PAGES */
}
/*--------------------------- _LOAD_FAR_32 --------------------------------
This runtime routine is used to access paged memory via a runtime function.
It may also be used if the compiler option -Cp is not used with the runtime argument.
Arguments :
- offset part of an address in the Y register
- page part of an address in the B register
Result :
- low 16 bit of value to be read in the D registers
- high 16 bit of value to be read in the Y registers
- all other registers remains unchanged
- all page register still contain the same value
--------------------------- _LOAD_FAR_32 ----------------------------------*/
#ifdef __cplusplus
extern "C"
#endif
#pragma NO_ENTRY
#pragma NO_EXIT
#pragma NO_FRAME
void NEAR _LOAD_FAR_32(void) {
#if USE_SEVERAL_PAGES
__asm {
PSHX ;// save X register
__PIC_JSR(_GET_PAGE_REG)
BEQ L_NOPAGE
LDAA 0,X ;// save page register
PSHA ;// put it onto the stack
STAB 0,X ;// set page register
LDD 2,Y ;// actual load, low word
LDY 0,Y ;// actual load, high word
MOVB 1,SP+,0,X ;// restore page register
PULX ;// restore X register
RTS
L_NOPAGE:
LDD 2,Y ;// actual load, low word
LDY 0,Y ;// actual load, high word
PULX ;// restore X register
RTS
}
#else /* USE_SEVERAL_PAGES */
__asm {
LDAA PAGE_ADDR ;// save page register
PSHA ;// put it onto the stack
STAB PAGE_ADDR ;// set page register
LDD 2,Y ;// actual load, low word
LDY 0,Y ;// actual load, high word
MOVB 1,SP+,PAGE_ADDR ;// restore page register
RTS
}
#endif /* USE_SEVERAL_PAGES */
}
/*--------------------------- _STORE_FAR_8 --------------------------------
This runtime routine is used to access paged memory via a runtime function.
It may also be used if the compiler option -Cp is not used with the runtime argument.
Arguments :
- offset part of an address in the Y register
- page part of an address in the B register
- value to be stored in the B register
Result :
- value stored at the address
- all registers remains unchanged
- all page register still contain the same value
--------------------------- _STORE_FAR_8 ----------------------------------*/
#ifdef __cplusplus
extern "C"
#endif
#pragma NO_ENTRY
#pragma NO_EXIT
#pragma NO_FRAME
void NEAR _STORE_FAR_8(void) {
#if USE_SEVERAL_PAGES
__asm {
PSHX ;// save X register
__PIC_JSR(_GET_PAGE_REG)
BEQ L_NOPAGE
PSHB ;// save B register
LDAB 0,X ;// save page register
MOVB 0,SP, 0,X ;// set page register
STAA 0,Y ;// store the value passed in A
STAB 0,X ;// restore page register
PULB ;// restore B register
PULX ;// restore X register
RTS
L_NOPAGE:
STAA 0,Y ;// store the value passed in A
PULX ;// restore X register
RTS
}
#else /* USE_SEVERAL_PAGES */
__asm {
PSHB ;// save A register
LDAB PAGE_ADDR ;// save page register
MOVB 0,SP,PAGE_ADDR ;// set page register
STAA 0,Y ;// store the value passed in A
STAB PAGE_ADDR ;// restore page register
PULB ;// restore B register
RTS
}
#endif /* USE_SEVERAL_PAGES */
}
/*--------------------------- _STORE_FAR_16 --------------------------------
This runtime routine is used to access paged memory via a runtime function.
It may also be used if the compiler option -Cp is not used with the runtime argument.
Arguments :
- offset part of an address in the Y register
- page part of an address in the B register
- value to be stored in the X register
Result :
- value stored at the address
- all registers remains unchanged
- all page register still contain the same value
--------------------------- _STORE_FAR_16 ----------------------------------*/
#ifdef __cplusplus
extern "C"
#endif
#pragma NO_ENTRY
#pragma NO_EXIT
#pragma NO_FRAME
void NEAR _STORE_FAR_16(void) {
#if USE_SEVERAL_PAGES
__asm {
PSHX ;// save X register
__PIC_JSR(_GET_PAGE_REG)
BEQ L_NOPAGE
PSHA
LDAA 0,X ;// save page register
STAB 0,X ;// set page register
MOVW 1,SP,0,Y ;// store the value passed in X
STAA 0,X ;// restore page register
PULA ;// restore A register
PULX ;// restore X register
RTS
L_NOPAGE:
STX 0,Y ;// store the value passed in X
PULX ;// restore X register
RTS
}
#else /* USE_SEVERAL_PAGES */
__asm {
PSHA ;// save A register
LDAA PAGE_ADDR ;// save page register
STAB PAGE_ADDR ;// set page register
STX 0,Y ;// store the value passed in X
STAA PAGE_ADDR ;// restore page register
PULA ;// restore A register
RTS
}
#endif /* USE_SEVERAL_PAGES */
}
/*--------------------------- _STORE_FAR_24 --------------------------------
This runtime routine is used to access paged memory via a runtime function.
It may also be used if the compiler option -Cp is not used with the runtime argument.
Arguments :
- offset part of an address in the Y register
- page part of an address in the B register
- value to be stored in the X:A registers (X : low 16 bit, A : high 8 bit)
Result :
- value stored at the address
- all registers remains unchanged
- all page register still contain the same value
--------------------------- _STORE_FAR_24 ----------------------------------*/
#ifdef __cplusplus
extern "C"
#endif
#pragma NO_ENTRY
#pragma NO_EXIT
#pragma NO_FRAME
void NEAR _STORE_FAR_24(void) {
#if USE_SEVERAL_PAGES
__asm {
PSHX ;// save X register
__PIC_JSR(_GET_PAGE_REG)
BEQ L_NOPAGE
PSHA
LDAA 0,X ;// save page register
STAB 0,X ;// set page register
MOVW 1,SP, 1,Y ;// store the value passed in X
MOVB 0,SP, 0,Y ;// store the value passed in A
STAA 0,X ;// restore page register
PULA ;// restore A register
PULX ;// restore X register
RTS
L_NOPAGE:
STX 1,Y ;// store the value passed in X
STAA 0,Y ;// store the value passed in X
PULX ;// restore X register
RTS
}
#else /* USE_SEVERAL_PAGES */
__asm {
PSHA ;// save A register
LDAA PAGE_ADDR ;// save page register
STAB PAGE_ADDR ;// set page register
MOVB 0,SP, 0,Y ;// store the value passed in A
STX 1,Y ;// store the value passed in X
STAA PAGE_ADDR ;// restore page register
PULA ;// restore A register
RTS
}
#endif /* USE_SEVERAL_PAGES */
}
/*--------------------------- _STORE_FAR_32 --------------------------------
This runtime routine is used to access paged memory via a runtime function.
It may also be used if the compiler option -Cp is not used with the runtime argument.
Arguments :
- offset part of an address in the Y register
- page part of an address is on the stack at 3,SP (just below the return address)
- value to be stored in the X:D registers (D : low 16 bit, X : high 16 bit)
Result :
- value stored at the address
- all registers remains unchanged
- the page part is removed from the stack
- all page register still contain the same value
--------------------------- _STORE_FAR_32 ----------------------------------*/
#ifdef __cplusplus
extern "C"
#endif
#pragma NO_ENTRY
#pragma NO_EXIT
#pragma NO_FRAME
void NEAR _STORE_FAR_32(void) {
#if USE_SEVERAL_PAGES
__asm {
PSHX ;// save X register
__PIC_JSR(_GET_PAGE_REG)
BEQ L_NOPAGE
PSHD
LDAA 0,X ;// save page register
MOVB 6,SP, 0,X ;// set page register
MOVW 2,SP, 0,Y ;// store the value passed in X (high word)
MOVW 0,SP, 2,Y ;// store the value passed in D (low word)
STAA 0,X ;// restore page register
PULD ;// restore A register
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