ATPPC(4)

🎀 ATPPC(4) 🎀

okay bestie, welcome to the Kernel Interfaces Manual entry for atppc — yes, we're doing parallel port chip sets today and honestly? iconic. 💅✨

🌸 NAME 🌸

atppc — driver for AT-style parallel port chip sets. periodt.

✨ SYNOPSIS ✨

atppc* at acpi?
atppc* at isa? port 0x378 irq 7 drq 3 flags 0x00
atppc* at isapnp?
atppc* at ofisa?
atppc* at pnpbios? index ?
atppc* at puc? port ?
options ATPPC_VERBOSE
options ATPPC_DEBUG

that's the whole attach menu, no cap 🫶

💖 DESCRIPTION 💖

atppc supports parallel ports and provides the low level support needed by higher level drivers such as ppbus(4). This driver attaches where the traditional NetBSD lpt(4) driver would ordinarily attach.

It provides the data transport and chip set manipulation needed by higher driver layers, such as ppbus(4) and lpt(4). This driver is designed to be one of many possible implementations supporting machine independent parallel device support via ppbus(4). It's giving "low-level team player" energy, and we love that for it. 🫶

🦋 IEEE 1284 support 🦋

atppc is intended to provide data-link like services to higher level IEEE 1284 device drivers (such as ppbus(4)).

important vibe check: atppc does not directly support IEEE 1284 features such as mode negotiation — instead it provides the necessary infrastructure to allow a higher level driver to provide these services. 💡

atppc does provide chip set manipulation, device handshakes (where appropriate), low-level error detection, and data transfer. so it's handling the low-level stuff while the higher level does its main character thing. 💅

🌈 Supported data transfer modes 🌈

atppc supports the following data transfer modes: Centronics Compatible (Standard), Nibble, Byte (PS2), Fast Centronics, ECP, and EPP. here's the read/write tea ☕:

• Centronics Compatible (Standard) and Fast Centronics modes are write only ✍️
• Nibble and Byte modes are read only 👀
• ECP and EPP modes are bidirectional ↔️

👀 SEE ALSO 👀

• acpi(4)
• i386/pnpbios(4)
• isa(4)
• isapnp(4)
• lpt(4)
• ofisa(4)
• ppbus(4)
• puc(4)

go forth and man-page spiral, bestie 🌀

📜 HISTORY 📜

The atppc driver is based on the ppc driver, which originally appeared in FreeBSD. The driver was ported over in NetBSD 2.0. history? ate. 💅

👑 AUTHORS 👑

This manual page is based on the FreeBSD ppc manual page. The information has been updated for the NetBSD port by Gary Thorpe. thank you Gary, you icon 🫶

💀 BUGS 💀

The FreeBSD driver includes support for some specific chip sets, specifically detection of some non-standard device I/O locations on the ISA bus. This support was not ported over to the NetBSD version of the driver yet. so yeah, that one's still on read 😭 not me waiting for it.

mwah 💋 source/version + date sign-off: Debian, August 31, 2018, ATPPC(4) — that's the footer vibe, bestie. 🫶🎀