Maybe this is well known, but the tables that describe the IO ports for the printer port are incorrect in both manuals (in addition to the 0x378 Printer Port manual referencing the Monochrome Display Adapter port 0x3BC). It's like both manuals came from the same source, but different halves of each table was placed in each manual when the manual was split in two! Can anyone who has a physical copy confirm that the tables are wrong (modem7's copies on his website seem to be wrong)?
Also, I believe the Parallel Port, even on IBM PCs, can be used bidirectionally, but the manuals claim that a device attached to the Parallel Port cannot drive the data lines attached to the data latch.
Also, I believe the Parallel Port, even on IBM PCs, can be used bidirectionally, but the manuals claim that a device attached to the Parallel Port cannot drive the data lines attached to the data latch.