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Do HP Printers Send Information Back To The C
DocumentID: 600113
Revision Date: 29-Feb-96 1:28:20 PM

The information in this document applies to:
WordPerfect® 5.1 for DOS

Problem

Symptoms: Do Hewlett-Packard printers send information back to the computer, and will a PC AT recognize this information? Solutions: The answer is Yes to both questions. The Print to Hardware Port option in WP needs to know if the printer has received the byte of information that the program has just sent to the printer. The printer sends information back to the computer via the ACK (Acknowledge) line (pin 10). It is very important that the base address specified in WP match the port's base address. It is this address that is modified by WP, the CPU and the printer. If WP is looking at a wrong address, it will never see a notification from the printer that a byte has been received. If WP doesn't receive this acknowledgement, WP will return an error to the user.

Answer:

Details:


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