> From: Alfred Wallner
>
> struct Record {
> UInt16 a;
> UInt16 b;
> UInt8 c;
> UInt16 d;
> } ixRec;
> [snip]
>
> >From my record structure, I picked 5 as the byte offset value
> for DmWrite, but that doesn't work, so I have to pick offset 6,
> which is the low byte of the UInt16 field.
>
Your compiler is probably packing the structure to word-align the members.
If you want to use a mixture of word and byte vars, put the byte vars at the
end. E.g.,
struct Record {
UInt16 a;
UInt16 b;
UInt16 d;
UInt8 c;
} ixRec;
Or, pack it yourself, as in:
struct Record {
UInt16 a;
UInt16 b;
UInt8 c;
UInt8 filler;
UInt16 d;
} ixRec;
Or, use the offsetof macro to determine where things actually are.
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