Date: Wed, 31 Jan 1996 21:32:40 +0100 From: Poul-Henning Kamp <phk@critter.tfs.com> To: hackers@freebsd.org Subject: Re: Watchdog timers (was: Re: Multi-Port Async Cards) Message-ID: <5377.823120360@critter.tfs.com> In-Reply-To: Your message of "Wed, 31 Jan 1996 14:08:08 CST." <199601312008.OAA07401@brasil.moneng.mei.com>
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I actually thought about this some time back, and have a suggestion for a ISA card: The "FreeBSD gadget": Watchdog, can be set to timouts of 1s, 10s and 60s or something. Will launch a RESET, NMI, or IRQ (jumper). 10, 100 or 250 Mhz timer, with readable count, generates IRQ 20/100/250 (jumper) times a second. (For microtime) (Maybe even with a 10/11 swallow counter along the lines the XNTP people suggest.) NVram for console. 64K of NVram (preferrably FIFO), for console-messages, not affected by reset. Optional: A microcontroller to make a async console with the above nvram. (incl modem handling and passwd) Possibly even with a BIOS-eprom to even make the bios available that way. Optional: NVram for acceleration of NFS &c. sockets and a battery for 4-8 Mb ram. Possibly with a little clock to do refresh so DRAM could be used. (cheaper) Now, if produced in some decent quantity, the price might be right... How many ISP's would buy one ? I'm not going to make it, I'm SW only, but I'd buy a couple right away. Any takers ? -- Poul-Henning Kamp | phk@FreeBSD.ORG FreeBSD Core-team. http://www.freebsd.org/~phk | phk@login.dknet.dk Private mailbox. whois: [PHK] | phk@ref.tfs.com TRW Financial Systems, Inc. Future will arrive by its own means, progress not so.
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