Compuprint 10200 Programmer Manual User Manual
Page 221
Interfaces
217
nDataAvail (NFault)
Compatibility Mode:
Set low to indicate that an internal printer error has occurred.
Negotiation Phase:
Set high to acknowledge 1284 compatibility. In Nibble or Byte Mode it is
then set low to indicate printer-to-host data is available following host
setting HostBusy (nAutoFd) high.
Nibble Mode:
Set low to indicate that printer is ready to send to host.
Then used to send data bits 0 then 4.
Reverse Data Transfer
Phase:
Byte Mode:
Used to indicate that data is available.
Reverse Idle Phase:
Used to indicate that data is available.
nDataAvail (NFault)
Compatibility Mode:
Set low to indicate that an internal printer error has occurred.
Negotiation Phase:
Set high to acknowledge 1284 compatibility. In Nibble or Byte Mode it is
then set low to indicate printer-to-host data is available following host
setting HostBusy (nAutoFd) high.
Nibble Mode:
Set low to indicate that printer is ready to send to
host. Then used to send data bits 0 then 4.
Reverse Data Transfer
Phase:
Byte Mode:
Used to indicate that data is available.
Reverse Idle Phase:
Used to indicate that data is available