Compiler Option

[Brax02]

Hello,

I have a basic question about the compiler options

in my PRM file I have the following configuration about the Z_RAM direct access

Z_RAM                    = READ_WRITE   0x0080 TO 0x00FF;

DEFAULT_RAM,                        INTO  Z_RAM;

etc..

_DATA_ZEROPAGE,                     /* zero page variables */

MY_ZEROPAGE                         INTO  Z_RAM;

in main.asm

MY_ZEROPAGE:  section

abcd:  DS.B  1

main: section

LDA abcd           ; 3 bytes used in memory (2 bytes for the addresses)

LDA abcd.B        ;2 bytes used in memory (1 bytes for the addresses)

How is it possible to configure the compiler to do the difference between a direct address and a long address by itself to optimize the code size ?

[bigmac · Accepted solution]

Hello,

The PRM file, which identifies the addresses of the various section names, is accessed by the linker, but not the assembler.  The assembler will normally assume that all variables have 16 bit addresses, by default.  Any variables to be specifically located within zero page RAM can be identified with the assembler directive XREFB.

Regards,

Mac

[Brax02]

ok thanks a lot !

[ZhangJennie]

can you please upload your demo project to showcase us your issue? thanks!