ThinkPad 850 'PowerPC' Information and Software

System Type: 6042

Released in 1995 after some other short-lived PowerPC ThinkPads, this particular series of ThinkPads was unique exclusively for the use of having a PowerPC microprocessor instead of the conventional x86 intel ones. They were also designed around IBM's PReP standard which Motorola also had a slice in developing-- however apparently Motorla PReP machines were slightly different as separate boot diskettes had to be used if you had an IBM or Motorola PReP machine. A fully configured 850 could ramp up to $20,000; keep in mind this is with 96 MB of RAM, a web camera, GUI-based BIOS and enterprise hardware made in Japan: something almost unheard of in 1995 on a portable laptop. It's worth noting most laptops today still don't feature SCSI-based hard disks and GUI BIOSes.

Along with the CPU, IBM also made other elements of the hardware somewhat proprietary, yet extremely modular. The 850's keyboard simply flips up revealing all pieces of the hardware below which pop out without any tools. The keyboard *can* be locked to prevent anyone from simply opening the unit. Of course this acts as a double-edged sword; even though the hardware is proprietary and easier to work with in normal situations, it also makes it extremely difficult to replace if either the DRAM cards fails, or the rather unconventional 2.5" SCSI HDD. Fortunately the few surviving machines are hardly ever used and in fairly decent shape with few run hours; most likely related to the fact little software runs on these machines.

Despite the relatively obscure architecture, the ThinkPad 850 is capable of running a handful of operating systems:
*AIX 4.1.5 through 4.2.1
*Solaris 2.5.1 PowerPC Edition
*Microsoft Windows NT
*OS/2 Warp PowerPC Edition
*Linux (w/ some modding for PReP support)



--> Hardware Maintenance Manual 850 Series

--> I.T.S.O. IBM Personal Computer and ThinkPad Power Series

--> I.T.S.O. PowerPC An Inside View

--> RS/6000 Notebook 860 (advertisement brochure)

--> OEM Hard Disk Drive Specifications for 2.5" SCSI

--> Solaris 2.5.1 PowerPC Edition (not able to publicly distribute)

--> AIX 4.2.1 (not able to publicly distribute)

Note: the I.T.S.O. would later become known as IBM's 'redbook' series, since IBM's hardware division is almost completely dissolved redbooks are now handled by Lenovo.


ThinkPad PReP Networking

The ThinkPad 850 and others do not have any discreet ethernet jacks; therefore you'll need a PCMCIA adapter or another solution. Only certain IBM-made PCMCIA ethernet and token ring adapters are supported under AIX-- I am not sure about other operating systems.

IBM Credit Card Adapter Ethernet I

IBM Credit Card Adapter Ethernet II (42H4916)

IBM Token Ring (there are a slew of token ring PCMCIA adapters and nothing explicitly specified):
*PCMCIA Token Ring Auto16/4 Credit Card Adapter (92G9352)
*IBM Credit Card Adapter Token-Ring 16/4 (0933030) *IBM Turbo 16/4 Token-Ring PC Card 2 (???)
*IBM 16/4 Token-Ring Cardbus Adapter (34L4801)
*PCMCIA Token-Ring (85H3668)


Installing NT without a floppy drive

Obtained from Trevor's old site, placed here for archival purposes.

1. Download the arc boot image from the IBM FTP site.
2. Use linux/unix dd to write it onto an external SCSI drive on an alternative working system.
3. Attach the external SCSI drive to the PowerPC Thinkpad you want to load NT onto.
4. Boot from the external hard drive (get into the firmware/CMOS settings to change the boot device).
5. Go to "Select installation and setup services" -> "Advanced setup menu" -> "Disk partition management service".
6. Make 2 extra FAT paritions: one 2MB partition for NT Loader and the rest of the disk for NTFS (which you can convert from FAT->NTFS later during the install).
7. Insert the NT CD.
8. Go back to the ARC main menu.
9. Select "Run maintenance program".
10. Enter "CD:\ppc\setupldr".
11. Installation starts.


Booting Into Service Mode

Below are the excerpts from IBM's removed articles on booting the 850 and related machines into service mode for AIX:

When booting a PowerPC into Service mode, cd0 or rmt0 must be before the hdisk in the bootlist. If not, change the bootlist at boot time. On some models, you can set the machine to use a default bootlist that includes both cd0 and rmt0. If a bootable CD or tape is in the CD-ROM or tape drive, the machine will boot from this device.

For most of the newer PCI-based models, selecting the default bootlist, with a bootable tape or CD loaded in the machine, causes the system to automatically boot from that device. Generally, the next menu on the screen asks the administrator to define the system console.

For all machines discussed here, if you are using a graphical terminal, you will use a function key such as F5. If you are using an ASCII terminal, use an equivalent number key such as 5. Use the numbers across the top of the keyboard, not the numbers on the numeric keypad. On ASCII terminals, the icons may not be displayed on the screen; the number can be pressed between the second and third beeps, the second beep being a series of three clicks.

PCI machine-specific information

The following systems all use the F5 or 5 key to read from the default boot list, which is written into the system firmware:

MODEL       7017       7024       7025       7026       7043       7137
-------   -------    -------    -------    -------    -------    -------
TYPE      S70        E20        F30        H10        43P-140    F3L
          S7A        E30        F40        H50        43P-150        
          S80                   F50        H70        43P-240           
                                           B80        43P-260          

On these machines, use 5 (on the keyboard, not the keypad) if you are using an ASCII terminal. On a locally attached graphics console, use the F5 function key. The F5 or 5 key must be pressed just after the keyboard icon or message is displayed on the console. If you have either a 7026-M80, 7026-H80 or a 7025-F80, then the 5 key will be the default whether you have an ascii or graphics console.

The following systems use the F1 key to enter System Management Services mode (SMS):

MODEL       6040       7042       7247       7249
-------   -------    -------    -------    -------
TYPE        620        850        82x        860

You should be in an Easy-Setup menu. Select the Start Up menu. Clear the current bootlist settings and then select the CD-ROM for choice 1 and hdd (the hard disk) for choice 2. Select OK. Insert the CD-ROM and select the EXIT icon. The machine should now boot from the CD-ROM.

The following systems use the F2 key to enter SMS:

MODEL         6015       6050       6070       7020       7248
-------     -------    -------    -------    -------    -------
TYPE          440        830        850        40P        43P

Select Select Boot Device from the initial menu on the screen, and then select Restore Default Settings from the list. Press the Esc key to exit all the menus, and then reboot the machine. The system should boot from your bootable media.

For information on accessing the rootvg volume group, see the next section in this document.



----CPU Options----

*603e 133 Mhz CPU






Up to 96 MB with the use of DRAM cards.