CMD_UPDATE/ETD_UPDATE - write out internal buffers to card

As the carddisk.device does not buffer data internally, this command performs no operation and returns immediately. It is implemented to support file systems that use it as part of the regular trackdisk-type device interface.

io_Device

preset by the call to OpenDevice()

io_Unit

preset by the call to OpenDevice()

io_Command

CMD_UPDATE or ETD_UPDATE

io_Flags

0 or IOF_QUICK

io_Error

0 for success.

CMD_WRITE