> In fact per definition
and in reality the Z85(C)30 does not give you any hint when the last
octet, the checksum and the closing flags left the shift register.
At least I haven't found one. Just resetting RTS within the transmit
interrupt after the last octet likely even chops off the last octet,
not only CRC and closing flags (at that point the last octet just
got transfered into the transmit shift register). There are modes
that let the Z8530/Z85230/etc handle the handshake themselves, but
those are unsuitable for most SCC cards. The MODEM latency is another
issue, a well-designed MODEM should delay RTS itself *hint hint
nudge nudge*. ;-)
Joerg Reuter http://poboxes.com/jreuter/
And I make my way to where the warm scent of soil fills the evening air.
Everything is waiting quietly out there.... (Anne Clark)
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