Hi all,

Supplementary issue - some cards do not appear to provide the
0xfe token to show that that data is available. I suspect this might
be because of the value of the pull-up on DI. Presently I have 47k

There is a final 0xff before data appears. The delay between request
and that final 0xff looks about right (500us) but because the PIC is
waiting for 0xfe, the data following isn't read into RAM. Does anyone
have an opinion on whether the pull-up would be the cause and if so
what would be a more reliable value ? Could experiment but time for
only one problem at a time today

TIA

Joe=20

--=20
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