Date: Thu, 28 Oct 2004 11:27:30 -0400 From: Mike Hauber <m.hauber@mchsi.com> To: freebsd-questions@freebsd.org Subject: shared memory Message-ID: <200410281127.30511.m.hauber@mchsi.com>
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Greetings, I have acquired a mo/bo with a built-in video adapter. =20 Being that I have 768 megs of ram, I _know_ I have plenty=20 of memory to allot to video. BIOS doesn't pass this on to=20 =46reeBSD. I have two choices for x. I can use the VESA standard or I=20 can use the S3 video driver (both come up fine, but theres=20 quit a bit of chop when it comes to video processing=20 regardless of which I use).=20 I'm bringing up VESA from the kernal and it's giving it 16=20 megs of ram. Where can I read up on, or how can I increase=20 this allotment? As for the S3 video driver, do I allot the memory from the=20 kernal or is this somehow set up from the x configuration=20 file? (I'm running x.org, although that probably shouldn't=20 matter being that they pretty much seem the same at this=20 point). Applicable nfo as follows: (from dmesg -a) Timecounter "i8254" frequency 1193182 Hz CPU: AMD Athlon(tm) Processor (1202.73-MHz 686-class CPU) Origin =3D "AuthenticAMD" Id =3D 0x644 Stepping =3D 4 Features=3D0x183f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,= CMOV,PA T,PSE36,MMX,FXSR> AMD Features=3D0xc0440000<RSVD,AMIE,DSP,3DNow!> real memory =3D 788463616 (769984K bytes) avail memory =3D 760496128 (742672K bytes) Preloaded elf module "vesa.ko" at 0xc066d140. =2E..snip... VESA: v3.0, 16384k memory, flags:0x1, mode table:0xc00c0e2a=20 (c0000e2a) VESA: S3 Incorporated. Savage4 =2E..snip... agp0: <VIA 82C8363 (Apollo KT133A) host to PCI bridge> mem=20 0xd8000000-0xdbffffff at device 0.0 on pci0 pcib1: <VIA 8363 (Apollo KT133) PCI-PCI (AGP) bridge> at=20 device 1.0 on pci0 pci1: <PCI bus> on pcib1 pci1: <S3 model 8a26 graphics accelerator> at 0.0 irq 9 =2E..snip... sc0: <System console> at flags 0x100 on isa0 sc0: VGA <16 virtual consoles, flags=3D0x300> vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem=20 0xa0000-0xbffff on isa0 =2E..snip... (from /sys/i386/conf/WIZARD, comments removed for cleaner=20 reading) cpu I686_CPU ident WIZARD maxusers 132 options CPU_ATHLON_SSE_HACK options CPU_ENABLE_SSE =2E..snip... options USER_LDT options SHMALL=3D32768 options SHMMAX=3D67108864 options VESA =2E..snip... device sc0 at isa? flags 0x100 device vga0 at isa? device agp =2E..snip... =46rom what I've read on it, I can tell you that I'm=20 completely lost when it comes to shared memory (and reading=20 more seems to confuse me more). I simply don't understand=20 how it works. =20 Of course, I know that built in video is recommended against=20 (regardless of what OS is running), but I'm sure there's a=20 way to up the memory... And I hope that theres a place=20 that explains how it works in laymens terms? :) So far, I've re-read the manual on setting up x, for setting=20 up video applications, various video app manuals, LINT, and=20 many googles on shared memory. Mayhaps there's a man page I'm missing that puts all this=20 stuff in perspective? If not, someone explain it so I can=20 write one. :) Thanks. Mike
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