What kind of printer port does the PCjr use?
The parallel port sidecar uses a fairly standard parallel port implementation that was common on early PCs. The parallel port can write 8 bits at a time and read 4 bits using control lines. It is implemented in TTL logic with approximately 13 chips. The output is a standard DB25 connector. The port and IRQ line are not adjustable, meaning that two parallel port sidecars can not be used on the same machine. (And of course there are ways around this … keep reading.
The parallel port sidecar uses a fairly standard parallel port implementation that was common on early PCs. The parallel port can write 8 bits at a time and read 4 bits using control lines. It is implemented in TTL logic with approximately 13 chips. The output is a standard DB25 connector. The port and IRQ line are not adjustable, meaning that two parallel port sidecars can not be used on the same machine. (And of course there are ways around this …
Related Questions
- My PC does not have a parallel printer port. Do you have a cable or adapter to link an HP1100 laserjet IEEE 1284c connection to a USB port?
- I want to connect a laptop with USB, no printer port to a HP 4500 colour laser printer. What do I need?
- Is the hardware key plugged into any port with a plotter, printer, or another key already attached?
