StarMax series (and the 4400) seemed to be about as close to CHRP as we got. My off-brand StarMax clone (PowerCity) had a PS/2 and an ISA port. Ran BeOS well, and had a quirk that I could hear a tight loop on the speaker.
[1] https://cdn.preterhuman.net/texts/computing/apple_hardware_d...
The powercity models were interesting, because they came out after Apple revoked Motorola's clone license. A German company, ComJet, bought up the boards and sold unlicensed clones cheap. Case was slightly different, but otherwise they corresponded to StarMax models (fairly certain they were identical but may have been last revision boards).
Apple Cobra Open Firmware CHRP 1.1 B3 built on 08/18/97 at 13:04:24
Copyright Apple Computer 1994,1996,1997
Copyright IBM Corporation 1996
All rights reserved.
ok
0 > dev / ls
ff82ec18: /cpus
ff82ee08: /PowerPC,604e@0
ff82f600: /chosen
ff82f750: /memory@0
ff82f8d8: /memory-controller@fec00000
ff82f9d8: /openprom
ff82fab8: /rom@ff000000
ff82ff48: /boot-rom@fff00000
ff830060: /options
ff830828: /aliases
ff830c78: /packages
ff830d00: /deblocker
ff8314c8: /disk-label
ff832090: /obp-tftp
ff835db8: /mac-parts
ff836578: /mac-files
ff837de0: /fat-files
ff839700: /iso-9660-files
ff83a148: /bootinfo-loader
ff83b7d0: /xcoff-loader
ff83c060: /pe-loader
ff83c7d0: /elf-loader
ff83da18: /terminal-emulator
ff83dab0: /rtas
ff83dc70: /pci@80000000
ff83ff38: /isa@b
ff8414e0: /nvram@i74
ff841ad0: /rtc@i70
ff842500: /parallel@i378
ff842988: /serial@i3f8
ff843020: /serial@i2f8
ff8436b8: /sound@i534
ff850288: /8042@i60
ff8515f8: /keyboard@0
ff854b88: /mouse@1
ff8554c0: /fdc@i3f0
ff858730: /disk@1
ff85bac0: /op-panel@i808
ff85bba0: /pwr-mgmt@i82a
ff85bed8: /timer@i40
ff85c070: /interrupt-controller@i20
ff85c250: /dma-controller@i0
ff85c738: /pci-ide@b,1
ff85d028: /ide@0
ff85db78: /ide@1
ff85e6c8: /cdrom@0
ff862e60: /mac-io@d
ff863468: /scsi@10000
ff865298: /disk
ff8660c8: /tape
ff8671b8: /adb@11000
ff867cb0: /keyboard@2
ff8685a0: /mouse@3
ff8687c0: /escc-legacy@12000
ff8689b8: /ch-a@12002
ff868b08: /ch-b@12000
ff868c58: /escc@13000
ff868e40: /ch-a@13020
ff869500: /ch-b@13000
ff869bc0: /via@16000
ff869cb0: /interrupt-controller@40000
ff869e70: /cirrus@e
ff86e2c8: /pci1022,2000@f
ok
0 >
The Motorola Yellowknife board seems remarkably similar to this system, as well as the IBM Long Trail system (albeit with Long Trail using a VLSI Golden Gate versus a MPC106 memory controller). Both of them use W83C553 southbridges and PC87307 Super I/O controllers.
The architecture is kind of weird, but the schematics on NXP's website can probably elucidate a bit more on the system's design.