Date: Wed, 04 Dec 96 18:47:07 +0100 From: garyj@frt.dec.com To: mikebo@tellabs.com Cc: questions@freebsd.org Subject: Re: 2.1.5R: aha0: DMA beyond end of ISA ? Message-ID: <9612041747.AA10824@cssmuc.frt.dec.com> In-Reply-To: Message from mikebo@tellabs.com of Wed, 04 Dec 96 10:57:29 CST.
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mikebo@tellabs.com writes: [delete] > Anyway, now every time I try to access the tape drives, I get: > aha0: DMA beyond end of ISA: 0x19cc0a0 > st1: bad request, must be between 0 and 0 > tar: read error on /dev/rst1: Input/Output error > [delete] > -------------------------------------------------------------------------- > FreeBSD 2.1.5-RELEASE #0: Sat Nov 30 19:19:25 CST 1996 > kroot@timesink.ttl.com:/usr/src/sys/compile/TIMESINK > CPU: 132-MHz Pentium 735\\90 or 815\\100 (Pentium-class CPU) > Origin = "GenuineIntel" Id = 0x52c Stepping=12 > Features=0x1bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8> > real memory = 67108864 (65536K bytes) > avail memory = 63885312 (62388K bytes) [delete] you need to enable bounce buffers, the ISA bus has only 24 bits and can only address 16MB. You have 64 MB. Add options BOUNCE_BUFFERS to your kernel coniguration file and make a new kernel. --- Gary Jennejohn (work) gjennejohn@frt.dec.com (home) Gary.Jennejohn@munich.netsurf.de (play) gj@freebsd.org
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