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Tamas Rudnai wrote:
> Hi,
> 
> Are you using linker or absolute code? Generally it is not a good idea
> to mix the two, and I think you would better go with linker. Then you
> can modify the linker script and can define a section as 'protected'
> for the table and your ordinary code into the first page.

Fantastic. Your advice worked perfectly. (If it's of use to someone else)
my linker script now contains:

CODEPAGE   NAME=page0      START=0x0               END=0x7FF

//CODEPAGE   NAME=page1      START=0x800             END=0xFFF

//CODEPAGE   NAME=page2      START=0x1000            END=0x17FF

CODEPAGE   NAME=datapage   START=0x800             END=0x1000
PROTECTED

...

SECTION    NAME=PROG0      ROM=page0
//SECTION    NAME=PROG1      ROM=page1
//SECTION    NAME=PROG2      ROM=page2
//SECTION    NAME=PROG3      ROM=page3
SECTION    NAME=DATASEC    ROM=datapage        // ROM for data tables
SECTION    NAME=IDLOCS     ROM=.idlocs         // ID locations
SECTION    NAME=DEEPROM    ROM=eedata          // Data EEPROM

And the data table is defined as:

DATASEC		CODE

BIGTABLE	dt	0x00, 0x01, 0x00, 0x02
		dt	0x01, 0x31, 0x00, 0x42


I spent way too much time on that! A big thank you to Tamas

- --
Brendan Gillatt | GPG Key: 0xBF6A0D94
brendan {a} brendangillatt (dot) co (dot) uk
http://www.brendangillatt.co.uk
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