RTII(4)

🎀 RTII(4) 🎀

okay bestie, so this is from the Kernel Interfaces Manual and it's literally all about the rtii driver — pull up a chair, we're getting into it 💖

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✨ NAME ✨

rtii — the AIMS Lab Radiotrack II FM radio device driver, yes that's her full government name 🫶

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🌸 SYNOPSIS 🌸

like, here's the whole vibe in code form:

option RADIO_TEA5759

rtii0  at isa? port 0x20c
rtii1  at isa? port 0x30c
radio* at rtii0

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💅 DESCRIPTION 💅

So the rtii driver is the one that provides support for the AIMS Lab Radiotrack II FM radio tuners. That's the whole assignment, and she ate 🔥

The Radiotrack II is a stereo FM tuner, and it literally lets you:

• tune in the range 87.5 - 108.0 MHz
• report signal status on the current frequency
• force audio output to mono
• perform hardware signal search
• and it has an internal AFC, iykyk ✨

Now, the Radiotrack II cards take only one I/O port. The I/O port is set by the driver to the value specified in the configuration file, and no cap, it must be either 0x20c or 0x30c. Those are the only two options, periodt 💀

okay so history time, because this part is actually so interesting — Philips Semiconductors released two almost identical chips, TEA5757 and TEA5759. The TEA5757 is used in FM-standards in which the local oscillator frequency is above the radio frequency (e.g. European and American standards). The TEA5759 is the version in which the oscillator frequency is below the radio frequency (e.g. Japanese standards). 🦋

and the option RADIO_TEA5759 changes the algorithm of frequency calculation for the TEA5757 based cards to conform with the Japanese standards. so like, if you need that, you need that 💜

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🔍 SEE ALSO 🔍

go read these too, bestie, they're iconic:

• isa(4)
• radio(4)

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🌈 HISTORY 🌈

The rtii device driver appeared in OpenBSD 3.0 and NetBSD 1.6. main character energy since day one 👑

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👑 AUTHORS 👑

The rtii driver was written by Vladimir Popov and Maxim Tsyplakov. The man page was written by Vladimir Popov. slay, thank you for your service 🫶

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and that's the whole page, fr fr 💖 this came from Debian, dated October 8, 2001, and it's the RTII(4) page — bye bestie, go tune some radio 🌸✨🎀