Parallel port: Difference between revisions
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The parallel port uses a sub-d 25 connector to provide a 8-bit data bus. It is commonly used by printers. There are 3 kinds of parallel ports: Standard Parallel Port (SPP), Enhanced Parallel Port (EPP) and Extended Capabilities Parallel Port (ECP). iirc they are all part of IEEE Standard 1284, or is it just the second two?
==Pin types==
=Registers & Common Address=▼
Most parallel ports come in either 36, 25 or 9 pin varieties. 25 and 9 pins being the most common.
▲==Registers & Common Address==
Common base addresses are:
* LPT1:
* LPT2: 0x278 (IRQ 6)
* LPT3: 0x3BC (IRQ 5)
==Data Register==
Address = Base Address + 0
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