HP 82335 and 27209 ISA GPIB (HP-IB) interface cards
An ISA bus add-in card from HP (later Agilent/Keysight) that lets a PC drive HP-IB / IEEE-488 instrument buses, used since the late 1980s to control benchtop test and measurement gear in labs and on factory floors. The card uses manually configured memory and IRQ jumpers and is built around the TMS9914 GPIB controller chip.
recommendation
Worth keeping but flagging as a niche legacy item. The hardware is clearly old ISA-era kit, but it only just graduated from the staging tree in late 2025 and saw real cleanup work shortly after, so it is still being actively tended. Surplus dealers continue to sell the cards, meaning there is a small population of working lab and industrial PCs that still rely on them, and there is no sign of any upstream removal discussion.
repository signals
sources
- cateee.net
CONFIG_GPIB_HP82335 is still present in current kernels, covers HP82335/HP27209, and depends on ISA_BUS.
- artisantg.com
82335 is marketed today as a used/tested HP-IB GPIB ISA interface card, with stock shown and product family 82335/82335A/82335B/27209.
- alliancetesteq.com
82335 is described as an ISA/EISA GPIB interface card and offered as new-from-surplus stock, indicating lingering legacy-market availability rather than mainstream OEM sales.
codex reasoning notes (technical)
Local shell inspection of drivers/gpib/hp_82335/hp82335.c shows a real module_init GPIB driver for manually configured legacy ISA memory/IRQ hardware, built around the shared tms9914 core. Local shell `git -c safe.directory=... log -- drivers/gpib/hp_82335` shows recent upstream attention: destaged on 2025-11-17, then two substantive hp_82335 cleanups on 2026-01-16; later Feb 2026 touches are treewide/mechanical. I attempted lore discovery via web searches for `hp82335`/`drivers/gpib/hp_82335` and found no indexed removal thread, so there is no evidence of active upstream removal talk. Cited URLs were obtained by web search: LKDDb for in-tree/current-kernel support, ArtisanTG and Alliance Test for present-day surplus market evidence. Recommendation is `keep-annotate`: hardware is clearly obsolete and deployments are likely limited to legacy lab/industrial ISA systems, but the driver was only recently promoted out of staging and still receives some upstream maintenance.