I have run into a small problem with the Keil C compiler.

I need a largish buffer (around 100 bytes), so there is not enough space in the lower 128 bytes.

So I though I could declare it as idata like this:

idata unsigned char buf[80];

And I can compile it, but the linker complains:

*** ERROR 107: ADDRESS SPACE OVERFLOW
    SPACE:   IDATA   
    SEGMENT: ?ID?LCDTERM2
    LENGTH:  0050H

It looks like the linker "thinks" I'm using a 8051. How do I tell the linker that there's 256 bytes available not 128?

If I decrease the size of the buffer to 40 bytes, I get no complaints since everything fits in the lower 128 bytes. This is the memory map I get then:

* * * * * * *   D A T A   M E M O R Y   * * * * * * *
REG     0000H     0008H     ABSOLUTE     "REG BANK 0"
DATA    0008H     0006H     UNIT         ?DT?LCDTERM2
DATA    000EH     0044H     UNIT         _DATA_GROUP_
IDATA   0052H     0028H     UNIT         ?ID?LCDTERM2
IDATA   007AH     0001H     UNIT         ?STACK

I haven't found anything in the manual of the knowledgebase (I may not have looked properly though...).

Best regards,

Mikkel C. Simonsen