diff options
Diffstat (limited to 'lib/libdisk/write_disk.c')
| -rw-r--r-- | lib/libdisk/write_disk.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/lib/libdisk/write_disk.c b/lib/libdisk/write_disk.c index 54025b2..0d261ea 100644 --- a/lib/libdisk/write_disk.c +++ b/lib/libdisk/write_disk.c @@ -163,6 +163,22 @@ Write_Int32(u_int32_t *p, u_int32_t v) bp[2] = (v >> 16) & 0xff; bp[3] = (v >> 24) & 0xff; } + +#ifndef __alpha__ +/* + * Special install-time configuration for the i386 boot0 boot manager. + */ +static void +Cfg_Boot_Mgr(u_char *mbr, int edd) +{ + if (mbr[0x1b0] == 0x66 && mbr[0x1b1] == 0xbb) { + if (edd) + mbr[0x1bb] |= 0x80; /* Packet mode on */ + else + mbr[0x1bb] &= 0x7f; /* Packet mode off */ + } +} +#endif #endif int @@ -180,6 +196,9 @@ Write_Disk(struct disk *d1) int PC98_EntireDisk = 0; #else int s[4]; +#ifndef __alpha__ + int need_edd = 0; /* Need EDD (packet interface) */ +#endif #endif int one = 1; int zero = 0; @@ -255,6 +274,7 @@ Write_Disk(struct disk *d1) dp[j].dp_ssect = 0xff; dp[j].dp_shd = 0xff; dp[j].dp_scyl = 0xff; + need_edd++; } else { dp[j].dp_ssect = i % d1->bios_sect; i -= dp[j].dp_ssect++; @@ -357,8 +377,10 @@ Write_Disk(struct disk *d1) write_block(fd,WHERE(2+i,d1),&d1->bootmenu[i * 512]); #else mbr = read_block(fd,WHERE(0,d1)); - if (d1->bootmgr) + if (d1->bootmgr) { memcpy(mbr,d1->bootmgr,DOSPARTOFF); + Cfg_Boot_Mgr(mbr, need_edd); + } memcpy(mbr+DOSPARTOFF,dp,sizeof *dp * NDOSPART); mbr[512-2] = 0x55; mbr[512-1] = 0xaa; |
