Re: [PARPORT] ECP mode for printers

Philip Blundell (
Fri, 18 Jun 1999 18:37:35 +0100

>The "problem" is the mid-level SCSI layer which jumps up and down on
>the ZIP driver. You can not prempt the lp driver when there is data
>in the FIFO since you will loose upto 16 bytes. HP laserjet printers
>generate screwy printouts if they miss a byte in a graphics stream.

I thought Tim's latest code could cope with the FIFO needing to be drained,
actually. Yes, I knew the SCSI layer wasn't ideal, but I didn't realise it
would actually cause an oops if it was starved of the bus for too long.

Oh well.


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This archive was generated by hypermail 2.0b3 on Fri 18 Jun 1999 - 13:39:32 EDT