5 Aug
2005
5 Aug
'05
5:14 a.m.
>>>> "Jim" == Jim Brain <brain
at jbrain.com> writes:
Jim> You can only do 8-bit mode when in CF "memory mapped mode".
Jim> But, as that requires the same amount of lines and precludes the
Jim> support of IDE disks in a project, many opt to use True IDE
Jim> mode. In IDE mode, you have to send and receive data in 16 bit
Jim> chunks...
No... the classic PIO mode IDE registers are 8 bits wide, not 16.
Some devices may allow 16 bit access as an optimization, but 8 bit
accesses is all you need.
paul