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PICList Thread
'32-Bit Hex Format (.HEX)'
1996\05\21@122600 by Adrian Clinciu

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       Hi,

I'am modifying my old programmer for PIC 16C84 witch not support 32-bit hex
format files. I found that "TT" digits can be

       00 for Data record
       01     End of File record
       02     Segment address record
       04     Linear address record



Any one know what "Segment address record" and "Linear address record" means?

       Thanks in advance,
       Adrian

1996\05\21@163552 by Clyde Smith-Stubbs

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Adrian Clinciu <spam_OUTepkadclTakeThisOuTspamepkadm.ericsson.se> wrote:

> I'am modifying my old programmer for PIC 16C84 witch not support 32-bit hex
>  format files. I found that "TT" digits can be
>
>         00 for Data record
>         01     End of File record
>         02     Segment address record
>         04     Linear address record
>
>
>
> Any one know what "Segment address record" and "Linear address record" means?

Yes, the type 4 supplies the upper 16 bits of a 32 bit address for the
subsequent
data records. The type 4 record is two bytes long, and the data content is
the 16 bits of address (written high nibble and byte first). The address field
of the record is ignored. Checksum is calculated normally.

The type 2 record is similar, except it provides the upper 16 bits of a
20 bit address for subsequent records, i.e. it gets left shifted
4 bits, then added to the 16 bit address in the data records.

Clyde

--
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