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on the amount of physical memory and limited by NMBCLUSTERS if present. Architectures without direct mapping also limit it based on the kmem_map size, which is used as backing store. On i386 and ARM, the maximum KVA used for mbuf clusters is limited to 64MB by default. The old default limits and limits based on GATEWAY have been removed. key_registered_sb_max is hard-wired to a value derived from 2048 clusters. |
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README |
$NetBSD: README,v 1.3 2005/12/11 12:17:04 christos Exp $ This is a port of NetBSD to the FIC8234 VME processor board, made by the swiss company CES (Geneve). These boards are (or have been) popular in high energy physics data acquisition (think of CERN!). See http://www.ces.ch/Products/CPUs/FIC8234/FIC8234.html for some technical data. The highlights: - MC68040 processor at 25 MHz (optional dual-processor) - 8 or 32 MByte RAM - 2 serial ports on Z85c30 - 79c900 (ILACC) ethernet - 53c710 SCSI The port is quite rudimentary at the moment. The kernel is started out of a running OS-9 system. SCSI support is not present yet, so it only works diskless with NFS (or ramdisk - not tested) root. It is good enough for multiuser, self-hosting etc. however. To start it: - make OS image by "objcopy --output-target=binary netbsd <imagename>" - load image to physical address 0x20100000 (RAM start + 1M) - jump to 0x20100400 For questions and contributions, contact Matthias Drochner (drochner@NetBSD.org).