On Tue, Jan 3, 2017 at 9:03 PM, drlegendre . <[email protected]> wrote:
> Add some RAM, maybe a DISC-II card and those things overheated even +with+ > the vents.. that's why the Cider fan became popular, among other things. > My Apple II+ had no fan, but never overheated. I heard a lot of people talk about needing a fan, but had no idea why. For much of its life my Apple II+ contained: 0: language card (16KB DRAM) 1: parallel printer card 2: super serial card 3: Videx 80-column card 4: Microsoft Z-80 softcard 5: homemade HP-IL interface card using HP 1LB3 chip 6: Disk II controller 7: Sorrento Valley 8-inch floppy disk controller and a Videx Keyboard Enhancer II (6502-based replacement for the Apple keyboard encoder, to add lower case, macros, etc.) The only times I had any unreliability were when one DRAM chip went bad, and when the firmware EPROM (2708) on the Videx card went bad. At other points in time it contained * Corvus hard disk interface * Apple Profile hard disk interface * Video Associate Labs VB3 microkeyer (large board in slot 7, cabled to an even larger board over the power supply) If anything was going to make it overheat, I would have bet on the VB3.
