On Tue, Feb 14, 2012 at 08:44:59PM +0100, Bernd Blaauw wrote: > I'm stuck with a few questions about applying SeaBIOS to Bochs > (Windows), hoping someone is willing to give out some helpful hints. > > 1) Can the downloadable v1.6.3 binary directly be used in Bochs, or > is a recompile needed? Thought I read some docs about MTRR config > options.
I think you may need to change some config options. Try enabling CONFIG_OPTIONROMS_DEPLOYED and disabling CONFIG_MTRR_INIT. I think the latest version of Bochs may no longer need one or both of these, but I'm not sure. Sebastian may know. > 2) What minimal system requirements does SeaBIOS put on a virtual > machine? 80586, 2MB, PCI ? 80386, 1MB, ISA ? SeaBIOS should work okay with 1MB. This seems to fail in recent QEMU versions, but I think that is specific to QEMU. Retesting seabios with qemu-0.13 - it looks like some regressions made it into seabios - see attached patch for a fix. (With patch below, it works okay for me with qemu-0.13 with "-m 1" option.) The latest SeaBIOS tip will work on 80386 - the 1.6.3 version requires a 80586. I think PCI may be required (to unlock ram). > 3) Is there an opensource BIOS, usable in Bochs and QEMU, that does > work with only 1MB RAM assigned to the VM? SeaBIOS fails this. SeaBIOS should work. If there are SeaBIOS issues, they should be fixed. -Kevin diff --git a/src/acpi.c b/src/acpi.c index 107469f..7bc662d 100644 --- a/src/acpi.c +++ b/src/acpi.c @@ -496,6 +496,10 @@ static void* build_pcihp(void) int i; u8 *ssdt = malloc_high(sizeof ssdp_pcihp_aml); + if (!ssdt) { + warn_noalloc(); + return NULL; + } memcpy(ssdt, ssdp_pcihp_aml, sizeof ssdp_pcihp_aml); /* Runtime patching of EJ0: to disable hotplug for a slot, diff --git a/src/pmm.c b/src/pmm.c index 82a0b1d..c649fd8 100644 --- a/src/pmm.c +++ b/src/pmm.c @@ -214,7 +214,8 @@ malloc_fixupreloc(void) int i; for (i=0; i<ARRAY_SIZE(Zones); i++) { struct zone_s *zone = Zones[i]; - zone->info->pprev = &zone->info; + if (zone->info) + zone->info->pprev = &zone->info; } // Add space free'd during relocation in f-segment to ZoneFSeg _______________________________________________ SeaBIOS mailing list SeaBIOS@seabios.org http://www.seabios.org/mailman/listinfo/seabios