I asked for a car, I got a computer. How's that for being born under a bad sign? - Ferris Bueller

November 8, 2015 - 11:19 pm - Posted by Sean

Achievement Unlocked! I’ve acquired an Apple IIgs ROM 3 motherboard:

Apple IIGS ROM 03 Motherboard PCB - Geek With Social Skills

Here’s a little bit of information about the Apple IIGS ROM 03:

  • Apple released ROM 03 in August 1989
  • Control Panel and real-time clock battery now user-serviceable
  • Standard amount of RAM increased to 1.125 MB
  • Additional memory was built-in on the motherboard
  • New ROM firmware now 256 KB in size and contains the System 5.x toolsets

The newer toolsets increased the performance of the machine by up to 10%, due to the fact that less had to be loaded from disk, tool ROM read access being faster than RAM, and their highly optimized routines compared to the older toolsets (pre-GS/OS based).

In addition to several bug fixes, more programmer assistance commands and features, a cleaned up Control Panel with improved mouse control, RAM Disk functionality, more flexible Appletalk support and slot mapping were added.

I’m pretty excited to have tracked this board down. In the near future I’ll be swapping out my ROM 01 PCB with this ROM 03 PCB so I’ll have a total of 2 MB of RAM. Game on!

This entry was posted on Sunday, November 8th, 2015 at 11:19 pm and is filed under Photos, Technology. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.