NJATA(4)

💅 NJATA(4) — bestie edition

okay so real talk, this is from the Kernel Interfaces Manual, and it's about njata — the Workbit NinjaATA-32 CardBus IDE controller driver. yes the name is giving ninja. no we're not over it. 🥷✨

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✨ NAME ✨

njata — the driver for the Workbit NinjaATA-32 CardBus IDE controller. that's it, that's the whole vibe. 🎀

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🌸 SYNOPSIS 🌸

njata* at cardbus? function ?
njata* at cardbus? function ? flags 0x01     # with wait 0x01

literally just attach it at cardbus? function ? and you're living. optionally sprinkle in flags 0x01 if you want that wait, iykyk. 💫

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🦋 DESCRIPTION 🦋

so the njata driver supports these Workbit Bus-Master CardBus IDE controller chips, and they're both kinda iconic ngl:

• NinjaATA-32Bi — CardBus / PCMCIA dual mode IDE controller, also known as “DuoATA”. this one is mainly used for portable drives. 🍓 and listen — this driver supports the CardBus mode only, okay? just CardBus. the PCMCIA part is not the main character here.
• NPATA-32 — CardBus IDE controller. this one is widely used for CardBus CompactFlash adapters. yes the CF card girlies know. 💖

and here's the slay part: these controllers are capable of bus-mastering for ATA PIO transfer. the njata driver uses bus-mastering PIO transfer unless the transfer buffer is unaligned — and it significantly reduces CPU usage for PIO-only ATA devices compared with usual PIO transfer. so it's literally doing less work and looking better doing it. 👑

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👑 CONFIGURATION 👑

the optional flags parameter is the “wait” value for ATA transfers. periodt.

and no cap, some combinations of host and device may fail without the flags parameter or with flags 0x00. 😭 if that's you, try adding wait values like flags 0x01 or flags 0x11 (the wait parameter is composed of two 4-bit values, okay, that's the math, don't come for me).

• smaller wait values should be faster 🏃‍♀️💨
• too long waits may cause transfer errors 💀

so basically: not too small, not too big. it's giving goldilocks. balance is everything bestie. ⚖️✨

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🌈 SEE ALSO 🌈

ata(4), atapi(4), cardbus(4), intro(4), wd(4), wdc(4)

go read them, they're all in the group chat too. 🫶

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⭐ HISTORY ⭐

the njata device driver first appeared in NetBSD 4.0. a legend was born. 🎂🔥

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💜 AUTHORS 💜

ITOH Yasufumi — thank you for your service, icon. 🎀🌸

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and that's the whole page, bestie — no crumbs left behind. this drop's from the Debian fam, dated September 7, 2006, and the manpage is literally called NJATA(4). mwah. 💅✨