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Apple IIgs: Difference between revisions
| Line 16: | Line 16: | ||
* [[Sequential Systems RAM GS]] - memory upgrade | * [[Sequential Systems RAM GS]] - memory upgrade | ||
* [[AST-VisionPlus]] - video input card | * [[AST-VisionPlus]] - video input card | ||
* [[Digital Vision ComputerEyes]] - video input card | |||
=Notes= | =Notes= | ||
Revision as of 17:35, 13 June 2020
The IIgs (or IIGS) is the last of the Apple II line.
General Information
The "Woz Edition" units are part of earlier production and will most commonly contain a ROM 00 board unless otherwise upgraded.
ROM Versions
- ROM 00 - Cannot run GS/OS, can be upgraded to ROM 01 via chip replacement.
- ROM 01 - Can run GS/OS.
- ROM 03 - Can run GS/OS and is the best option for doing so for stability and compatibility.
Expansion
With the video and disk drive ports included on the IIgs board, the system features a number of available expansion slots for use. Modern upgrades include Compact Flash storage, sound cards, etc. Also see these specific options:
- TransWarp GS - processor upgrade
- Sequential Systems RAM GS - memory upgrade
- AST-VisionPlus - video input card
- Digital Vision ComputerEyes - video input card
Notes
Hidden IIgs Secrets
- When you get the "Check startup device" message after booting your computer, press Control-Open-Apple-Option-N to see the names of the people on the Apple //gs design team
- Press Control-^ and then any key and the cursor will change into the key you pressed
- While in the monitor, enter a '#', and whenever you access the control panel, you will have two new options, "Memory Peeker" and "Visit Monitor" "Visit Monitor" allows you to do just that, and "Memory Peeker" lets you look at the stack and whatever memory location you desire.
Troubleshooting/Repair
Power supply line filter capacitors risk of exploding
These components on IIgs power supplies are prone to blowing randomly due to age and this will cause a giant mess inside the PSU potentially damaging other components. According to http://damntechnology.blogspot.com/2017/06/replacing-line-filter-capacitors-on.html the replacement part for the paper type is PME271Y510MR30 - Kemet Safety Film Capacitor - Paper - 0.01 uF - 250 VAC - Class Y2 or you can choose the more modern polypropylene F17103101000 - Vishay Safety Film Capacitor - Polypropylene - 0.01 uF - 250 VAC - Class Y2 one.
Vendors such as ReActive Micro also sell universal Apple II PSU kits which replace all the internal components with a newly designed board. See https://www.reactivemicro.com/product/universal-psu-kit/ for details and ordering.
Downloads
- gsosinstalldisks.zip - appears to be an archive of the GS/OS install disks
- GS/OS System 6.0.1 - Disk 1, Disk 2, Disk 3, Disk 4, Disk 5, Disk 6