Boot NetBSD/macppc from MBR disk APM disk on OpenFirmware 2.0

Just FYI,

--- 1) boot from a disk with fdisk parition of FAT16 and NetBSD disklabel ---

Open Firmware, 2.0
To continue booting the MacOS type:
BYE<return>
To continue booting from the default boot device type:
BOOT<return>
 ok
0 > dir ata/ATA-Disk@0:1,\ 
OFWBOOT .XCF 021 AFF9 6E040  ok
1 > boot ata/ATA-Disk@0:1,\ofwboot.xcf ata/ATA-Disk@0/netbsd loading XCOFF
tsize=10280 dsize=23C bsize=28F5 entry=E00000 
SECTIONS:
.text    00E00000 00E00000 00010280 00001000
.pad     00E10274 00E10274 00000D80 00011280
.data    00E11000 00E11000 0000023C 00012000
.bss     00E11240 00E11240 000028F5 00000000
.debug_l 00000000 00000000 00011AC7 0001223C
.debug_s 00000000 00000000 00004F0C 00023D03
.gnu.att 00000000 00000000 00000010 00028C0F
.ident   00000000 00000000 000000AD 00028C1F
.debug_i 00000000 00000000 00022214 00028CCC
.debug_a 00000000 00000000 00007673 0004AEE0
.debug_l 00000000 00000000 000143FC 00052553
.debug_a 00000000 00000000 000008E8 0006694F
.debug_r 00000000 00000000 00001049 00067237
.debug_f 00000000 00000000 000027A0 00068280
loading .text, done..
loading .data, done..
clearing .bss, done..

>> NetBSD/macppc OpenFirmware Boot, Revision 1.14 (Thu Mar 28 08:33:33 UTC 2024)
>> Open Firmware version 2.x
>> Open Firmware running in virtual-mode.
Cannot use bootpath
Using boot-device instead
11800060+167172 [463008+446635]=0xc481e4
 start=0x100000
[   1.0000000] Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
[   1.0000000]     2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013,
[   1.0000000]     2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023,
[   1.0000000]     2024
[   1.0000000]     The NetBSD Foundation, Inc.  All rights reserved.
[   1.0000000] Copyright (c) 1982, 1986, 1989, 1991, 1993
[   1.0000000]     The Regents of the University of California.  All rights reserved.

[   1.0000000] NetBSD 10.0 (GENERIC) #0: Thu Mar 28 08:33:33 UTC 2024
[   1.0000000] 	[email protected]:/usr/src/sys/arch/macppc/compile/GENERIC
[   1.0000000] total memory = 144 MB
[   1.0000000] avail memory = 125 MB
[   1.0000000] found ohare PIC at f3000000
[   1.0000000] bootpath: ata/ATA-Disk@0/netbsd
[   1.0000000] mainbus0 (root)
[   1.0000000] valkyriefb0 at mainbus0 address 0xf1000000
[   1.0000000] memory0 at mainbus0
[   1.0000000] bandit0 at mainbus0
[   1.0000000] pci0 at bandit0 bus 0
[   1.0000000] pchb0 at pci0 dev 11 function 0
[   1.0000000] pchb0: Apple Computer Bandit Host-PCI Bridge (rev. 0x02)
[   1.0000000] machfb0 at pci0 dev 13 function 0: ATI Technologies Mach64 GX (rev. 0x02)
[   1.0000000] machfb0: 16 MB aperture at 0x81000000, 0 KB registers at 0x00000000
[   1.0000000] machfb0: 64 KB ROM at 0x00000000
[   1.0000000] machfb0: 2048 KB VRAM 0.0 MHz, maximum RAMDAC clock 135 MHz
[   1.0000000] machfb0: found composite sync disabled
[   1.0000000] machfb0: initial resolution 1024x768 at 8 bpp
[   1.0000000] wsdisplay1 at machfb0 kbdmux 1
[   1.0000000] direct rendering for machfb0 unsupported
[   1.0000000] ex0 at pci0 dev 14 function 0: 3Com 3c905B-TX 10/100 Ethernet (rev. 0x30)
[   1.0000000] ex0: interrupting at irq 25
[   1.0000000] ex0: MAC address 00:50:04:65:51:1a
[   1.0000000] exphy0 at ex0 phy 24: 3Com internal media interface
[   1.0000000] exphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
[   1.0000000] obio0 at pci0 dev 16 function 0: addr 0xf3000000
[   1.0000000] mesh0 at obio0 offset 0x10000 irq 12: 50MHz, SCSI ID 7
[   1.0000000] scsibus0 at mesh0: 8 targets, 8 luns per target
[   1.0000000] zsc0 at obio0 irq 15,16
[   1.0000000] zstty0 at zsc0 channel 0 (console i/o)
[   1.0000000] zstty1 at zsc0 channel 1
[   1.0000000] awacs0 at obio0 offset 0x14000: irq 17,8,9
[   1.0000000] awacs0: headphones
[   1.0000000] audio0 at awacs0: playback, capture, full duplex
[   1.0000000] audio0: slinear_be:16 2ch 44100Hz, blk 4096 bytes (23.2ms) for playback
[   1.0000000] audio0: slinear_be:16 2ch 44100Hz, blk 4096 bytes (23.2ms) for recording
[   1.0000000] spkr0 at audio0: PC Speaker (synthesized)
[   1.0000000] wsbell at spkr0 not configured
[   1.0000000] swim3 at obio0 offset 0x15000 not configured
[   1.0000000] nvram0 at obio0 offset 0x60000
[   1.0000000] cuda0 at obio0 offset 0x16000 irq 18
[   1.0000000] nadb0 at cuda0: Apple Desktop Bus
[   1.0000000] iic0 at cuda0: I2C bus
[   1.0000000] videopll0 at iic0 addr 0x50: Apple onboard video PLL
[   1.0000000] wdc0 at obio0 offset 0x20000 irq property not found; using 13: DMA transfer
[   1.0000000] atabus0 at wdc0 channel 0
[   1.0000000] vmmask 7cc00000 schedmask 7fc00000 highmask 7fc00000
[   1.0001113] scsibus0: waiting 2 seconds for devices to settle...
[   1.0300201] WARNING: system needs entropy for security; see entropy(7)
[   1.3799451] adbkbd0 at nadb0 addr 2: extended keyboard
[   1.4099187] wskbd0 at adbkbd0 mux 1
[   1.4099187] wsmouse0 at adbkbd0 mux 0
[   1.4099187] adbms0 at nadb0 addr 3: 1-button, 100 dpi mouse
[   1.4699242] wsmouse1 at adbms0 mux 0
[   4.3400677] wd0 at atabus0 drive 0
[   4.3400677] wd0: <SPCC Solid State DiskB28>
[   4.3400677] wd0: 30533 MB, 62037 cyl, 16 head, 63 sec, 512 bytes/sect x 62533296 sectors
[   4.7301047] cd0 at scsibus0 target 3 lun 0: <MATSHITA, CD-ROM CR-8024, 2.0e> cdrom removable
[   6.4900943] swwdog0: software watchdog initialized
[   6.4900943] valkyriefb0: switched to 800 x 600 in 8 bit colour
[   6.5701002] wsdisplay2 at valkyriefb0 kbdmux 1
[   6.6001332] valkyriefb0: switched to 800 x 600 in 8 bit colour
[   6.6501154] wsdisplay3 at valkyriefb0 kbdmux 1
[   6.6501154] boot device: wd0
[   6.6801647] root on wd0a dumps on wd0b
[   6.7001683] root file system type: ffs
[   6.7001683] kern.module.path=/stand/macppc/10.0/modules
[   6.9101654] entropy: best effort
/etc/rc.conf is not configured.  Multiuser boot aborted.
Enter pathname of shell or RETURN for /bin/sh: 
# disklabel wd0
# /dev/rwd0:
type: ESDI
disk: wd0
label: default label
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 16
sectors/cylinder: 1008
cylinders: 62037
total sectors: 62533296
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # microseconds
track-to-track seek: 0  # microseconds
drivedata: 0 

8 partitions:
#        size    offset     fstype [fsize bsize cpg/sgs]
 a:  62009008    262144     4.2BSD      0     0     0  # (Cyl.    260*-  61776*)
 b:    262144  62271152       swap                     # (Cyl.  61776*-  62036)
 c:  62533296         0     unused      0     0        # (Cyl.      0 -  62036)
 d:    260096      2048      MSDOS                     # (Cyl.      2*-    260*)
# fdisk wd0
Disk: /dev/rwd0
NetBSD disklabel disk geometry:
cylinders: 62037, heads: 16, sectors/track: 63 (1008 sectors/cylinder)
total sectors: 62533296, bytes/sector: 512

BIOS disk geometry:
cylinders: 1024, heads: 255, sectors/track: 63 (16065 sectors/cylinder)
total sectors: 62533296

Partitions aligned to 2048 sector boundaries, offset 2048

Partition table:
0: Primary DOS with 32 bit FAT - LBA (sysid 12)
    start 2048, size 260096 (127 MB, Cyls 0-16/81/1)
1: NetBSD (sysid 169)
    start 262144, size 62271152 (30406 MB, Cyls 16/81/2-3892/131/63)
        PBR is not bootable: All bytes are identical (0x00)
2: <UNUSED>
3: <UNUSED>
No active partition.
Drive serial number: 265649028 (0x0fd57b84)
# 
---

--- 2) boot from a disk with Apple partition map (no native disklabel) ---

Open Firmware, 2.0
To continue booting the MacOS type:
BYE<return>
To continue booting from the default boot device type:
BOOT<return>
 ok
0 > boot 
OF_open bootpath=ata/ATA-Disk@0
read stage 2 blocks: 01234. done!
starting stage 2...

>> NetBSD/macppc OpenFirmware Boot, Revision 1.14 (Thu Mar 28 08:33:33 UTC 2024)
>> Open Firmware version 2.x
>> Open Firmware running in virtual-mode.
Cannot use bootpath
Using boot-device instead
11800060+167172 [463008+446635]=0xc481e4
 start=0x100000
[   1.0000000] Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
[   1.0000000]     2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013,
[   1.0000000]     2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023,
[   1.0000000]     2024
[   1.0000000]     The NetBSD Foundation, Inc.  All rights reserved.
[   1.0000000] Copyright (c) 1982, 1986, 1989, 1991, 1993
[   1.0000000]     The Regents of the University of California.  All rights reserved.

[   1.0000000] NetBSD 10.0 (GENERIC) #0: Thu Mar 28 08:33:33 UTC 2024
[   1.0000000] 	[email protected]:/usr/src/sys/arch/macppc/compile/GENERIC
[   1.0000000] total memory = 144 MB
[   1.0000000] avail memory = 125 MB
[   1.0000000] found ohare PIC at f3000000
[   1.0000000] bootpath: ata/ATA-Disk@0/netbsd
[   1.0000000] mainbus0 (root)
[   1.0000000] valkyriefb0 at mainbus0 address 0xf1000000
[   1.0000000] memory0 at mainbus0
[   1.0000000] bandit0 at mainbus0
[   1.0000000] pci0 at bandit0 bus 0
[   1.0000000] pchb0 at pci0 dev 11 function 0
[   1.0000000] pchb0: Apple Computer Bandit Host-PCI Bridge (rev. 0x02)
[   1.0000000] machfb0 at pci0 dev 13 function 0: ATI Technologies Mach64 GX (rev. 0x02)
[   1.0000000] machfb0: 16 MB aperture at 0x81000000, 0 KB registers at 0x00000000
[   1.0000000] machfb0: 64 KB ROM at 0x00000000
[   1.0000000] machfb0: 2048 KB VRAM 0.0 MHz, maximum RAMDAC clock 135 MHz
[   1.0000000] machfb0: found composite sync disabled
[   1.0000000] machfb0: initial resolution 1024x768 at 8 bpp
[   1.0000000] wsdisplay1 at machfb0 kbdmux 1
[   1.0000000] direct rendering for machfb0 unsupported
[   1.0000000] ex0 at pci0 dev 14 function 0: 3Com 3c905B-TX 10/100 Ethernet (rev. 0x30)
[   1.0000000] ex0: interrupting at irq 25
[   1.0000000] ex0: MAC address 00:50:04:65:51:1a
[   1.0000000] exphy0 at ex0 phy 24: 3Com internal media interface
[   1.0000000] exphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
[   1.0000000] obio0 at pci0 dev 16 function 0: addr 0xf3000000
[   1.0000000] mesh0 at obio0 offset 0x10000 irq 12: 50MHz, SCSI ID 7
[   1.0000000] scsibus0 at mesh0: 8 targets, 8 luns per target
[   1.0000000] zsc0 at obio0 irq 15,16
[   1.0000000] zstty0 at zsc0 channel 0 (console i/o)
[   1.0000000] zstty1 at zsc0 channel 1
[   1.0000000] awacs0 at obio0 offset 0x14000: irq 17,8,9
[   1.0000000] awacs0: headphones
[   1.0000000] audio0 at awacs0: playback, capture, full duplex
[   1.0000000] audio0: slinear_be:16 2ch 44100Hz, blk 4096 bytes (23.2ms) for playback
[   1.0000000] audio0: slinear_be:16 2ch 44100Hz, blk 4096 bytes (23.2ms) for recording
[   1.0000000] spkr0 at audio0: PC Speaker (synthesized)
[   1.0000000] wsbell at spkr0 not configured
[   1.0000000] swim3 at obio0 offset 0x15000 not configured
[   1.0000000] nvram0 at obio0 offset 0x60000
[   1.0000000] cuda0 at obio0 offset 0x16000 irq 18
[   1.0000000] nadb0 at cuda0: Apple Desktop Bus
[   1.0000000] iic0 at cuda0: I2C bus
[   1.0000000] videopll0 at iic0 addr 0x50: Apple onboard video PLL
[   1.0000000] wdc0 at obio0 offset 0x20000 irq property not found; using 13: DMA transfer
[   1.0000000] atabus0 at wdc0 channel 0
[   1.0000000] vmmask 7cc00000 schedmask 7fc00000 highmask 7fc00000
[   1.0001126] scsibus0: waiting 2 seconds for devices to settle...
[   1.0300182] WARNING: system needs entropy for security; see entropy(7)
[   1.3799466] adbkbd0 at nadb0 addr 2: extended keyboard
[   1.3999610] wskbd0 at adbkbd0 mux 1
[   1.3999610] wsmouse0 at adbkbd0 mux 0
[   1.3999610] adbms0 at nadb0 addr 3: wd0 at atabus0 drive 0
[   4.3601070] wd0: <DOGFISH SSD 64GB>
[   4.3601070] wd0: 61057 MB, 124053 cyl, 16 head, 63 sec, 512 bytes/sect x 125045424 sectors
[   4.4501030] 1-button, 100 dpi mouse
[   4.4501030] wsmouse1 at adbms0 mux 0
[   4.7301094] cd0 at scsibus0 target 3 lun 0: <MATSHITA, CD-ROM CR-8024, 2.0e> cdrom removable
[   6.4901043] swwdog0: software watchdog initialized
[   6.5701256] valkyriefb0: switched to 800 x 600 in 8 bit colour
[   6.6201058] wsdisplay2 at valkyriefb0 kbdmux 1
[   6.6401673] valkyriefb0: switched to 800 x 600 in 8 bit colour
[   6.6901107] wsdisplay3 at valkyriefb0 kbdmux 1
[   6.6901107] boot device: wd0
[   6.7201941] root on wd0a dumps on wd0b
[   6.7501591] root file system type: ffs
[   6.7501591] kern.module.path=/stand/macppc/10.0/modules
[   6.9201665] entropy: best effort
/etc/rc.conf is not configured.  Multiuser boot aborted.
Enter pathname of shell or RETURN for /bin/sh: 
# disklabel wd0
# /dev/rwd0:
type: ESDI
disk: wd0
label: fictitious
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 16
sectors/cylinder: 1008
cylinders: 124053
total sectors: 125045424
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # microseconds
track-to-track seek: 0  # microseconds
drivedata: 0 

4 partitions:
#        size    offset     fstype [fsize bsize cpg/sgs]
 a: 115343360   8388608     4.2BSD      0     0     0  # (Cyl.   8322*- 122749*)
 b:   1313456 123731968       swap                     # (Cyl. 122749*- 124052)
 c: 125045424         0     unused      0     0        # (Cyl.      0 - 124052)
 d:   8388032        64        HFS                     # (Cyl.      0*-   8321*)
disklabel: boot block size 0
disklabel: super block size 0
# pdisk /dev/rwd0c
Edit /dev/rwd0c -
Command (? for help): P  

Partition map (with 512 byte blocks) on '/dev/rwd0c'
 #:                type name            length   base      ( size )
 1: Apple_partition_map Apple               63 @ 1        
 2:           Apple_HFS MacOS          8388032 @ 64        (  4.0G)
 3:    Apple_Driver_ATA*Macintosh_Bs       512 @ 8388096  
 4:     Apple_UNIX_SVR2 NetBSD_root  115343360 @ 8388608   ( 55.0G) S0 RUFS k0  /
 5:     Apple_UNIX_SVR2 NetBSD_swap    1313456 @ 123731968 (641.3M) S1  SFS k0  (swap)

Device block size=512, Number of Blocks=125045424 (59.6G)
DeviceType=0x0, DeviceId=0x0
Drivers-
1:  11 @ 8388096, type=0x701

Command (? for help): q
# 

---
Izumi Tsutsui