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Mac OS 7.5.2 (PowerBook 500 with PPC Upgrade)

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[www].se [ftp].se [mirror].us
PB_500_Upgrade_Software.img_.sit (18.00 MB)
MD5: 3836cb478c5a55f79972be70346bc773
For System 7.0 - 7.6
Emulation
Guides on emulating older applications

This is the Original System Software CD for the Macintosh PowerBook PowerPC Upgrade for the PowerBook 500 series computer. It's bootable and the CD contents only include disk images of Mac System 7.5.2 for PowerBook 500 series with PPC upgrade (no other stuff).

Note: This disk-set also doubles-up as an install set for the PowerBooks 190, 5300 and Duo 2300c. It contains and installs System Enabler "5300/2300/190 Enabler" (v1.2). These PowerBooks stated doesn't have CD-ROM drive by default (an external CD drive is required to access the CD contents)
Compatibility
Architecture: 68k PPC

PowerBook 500 series with PPC upgrade

Comments

sfp1954's picture
by sfp1954 - 2020, June 21 - 8:14pm

Pretty trivial IF you can find the PPC daughter card - good luck with that.
T8 driver for all screws.
There are two screws underneath - remove and the keyboard lifts up.
Remove the two screws in the back and pop out the little cover hiding one of the heat sink screws.
Remove the three heat sink screws. Remove the heat sink. Remove the little plastic support.
Remove RAM card.
With an IC puller remove the daughter card. Insert new daughter card.

Some extra steps here - I think you can start at 5 or 6.
https://www.ifixit.com/Guide/Apple+PowerBook+520+Memory+(RAM)+Replacement/5507

snes1423's picture
by snes1423 - 2020, June 21 - 3:04pm

how would i go about performing this upgrade

sfp1954's picture
by sfp1954 - 2020, April 14 - 6:03pm

The PPC upgrade involved replacing the processor daughter card.
The new daughter card in addition to having a 100MHz PPC processor also had 8MB of onboard RAM as opposed to 4MB on the 540 and 520 cards. This allowed for 40MB of total RAM with a 32 MB ram card.
NewerTech? I believe also made a 133 or a 167 upgrade. Could be done in about 15 minutes.

But other than the ability to run PPC software I don't think there was much of an advantage.
68K software probably ran at about the same speed.
It did allow you to go as high as 8.6 with the OS.

A 520 daughter card. The RAM card plugs into the slot by the serial number and the processor card plugs into the logic board using the connector on the flip side.

https://www.ebay.com/itm/Apple-25-MHz-68LC040-CPU-for-PowerBook-520-/153...

500 series RAM card.
https://www.ebay.com/itm/Vintage-Apple-16meg-RAM-Memory-Module-PowerBook...

Jatoba's picture
by Jatoba - 2020, April 14 - 3:33pm

I wonder if the PowerPC upgrade involved swapping the processors, processor boards or the entire motherboards.

Wish my rig could also have a POWER10 processor upgrade. Tongue

IIGS_User's picture
by IIGS_User - 2020, April 14 - 3:19pm

Interesting piece of software. Smile