How do I clean/refurbish an Apple IIc Keyboard?
Nov 22, 2019 · My Apple IIc is what appears to be the first US model: A2S4000 with version 255 ROMs. The keyboard PCB is marked 820 0108 03 ©1983, and the keyswitches are the "cross" …
What do the '80/40' and 'keyboard' buttons on my Apple IIc do?
Feb 29, 2020 · Like caps lock, this switch toggles a setting in the keyboard controller and is not seen by software running on the Apple IIc. On machines with older keyboard ROMs the …
How to get into Apple BASIC prompt on an Apple IIc?
I just picked up a used Apple IIc. For some reason all I get when I boot is Check Disk Drive on the screen, even with a bootable disk in the internal drive: I cannot even get the system to read …
How does the Apple II address more than 128KB of RAM?
May 17, 2023 · Memory expansion cards of up to 1 MB were released both for the Apple IIc using this dedicated connector and for the Apple II/II+/IIe. As described in the technical reference …
power - How can I make an external PSU for an Apple IIc ...
Jan 10, 2020 · The standard Apple external PSU takes a country-specific input voltage (105 to 129 VAC, 60 Hz for North America) and provides (unregulated) 15 VDC. Though on page 11 …
Why did Apple remove booting from external drives in later IIc …
From Apple IIc Booting from external drive, this post. If my copy of the IIc hardware reference manual is to be believed, you can boot from the first external drive by typing PR#5. I suspect …
What are my modern options for loading programs and data files …
Nov 12, 2019 · I've recently acquired an Apple IIc. The internal 5.25" drive does seem to make appropriate noises at boot, but I do not (at least not yet) have any floppy disks, with software …
How was the second bank of Apple IIc ROM accessed?
May 29, 2020 · ¹ The schematic in that version of the manual is for newer versions of the Apple IIc that had the 32 KB ROM; this schematic shows the original A2S4000 model with a trace to be …
How long should I expect the Apple IIc self test to run?
May 23, 2020 · Not all IIc models do have the self test ROM. But if they do, it for sure doesn't run for hours. The most reliable way to invoke it is from reset. Power on; Hold down Open …
Apple IIc won't boot? - 68kMLA
Jan 2, 2011 · if PRINT PEEK(64447) returns 0, you have an Apple IIc with UniDisk 3.5 inch drive support (ROM revision '0'). if PRINT PEEK(64447) returns 3, you have an Apple IIc with …