Embedded Files
The Apple // line of computers were one of the first computers I cut my teeth on in my youth. I had access to an Apple //c with the 5.25" drive on the side, and used it many times to take computing on the go when I would present at school.
This computer has been upgraded with:
⬆️ Wish list ⬆️
for Trade/Swap,
Retrocomputing History, etc..
The A2Heaven Apple IIc RamExpress II+ card that fits into the RAM expansion slot within. The RamExpress II+ Memory Expansion Card adds a 1024K random-access memory (RAM) and Real time clock and a RAM disk with battery backup.
THANK YOU Jonathan Adar for providing a replacement key switch for the up-arrow key. I had not noticed it before, the key switch for the up-arrow had gone bad, but Jonathan to the rescue.
The 5X ROM is an enhanced ROM that is added to a Apple //c.
THANK YOU Jonathan Adar for buring the 5x ROM!
Provides a bootable disk as a result of installing the Apple //c RamExpress II+ card.
Provides a menu of various tools upon pressing Ctrl+Closed-Apple+Reset (or holding Closed-Apple when powering up). See below.
Zero the RAM card, in case it is corrupted.
Execute the machine and RAM card diagnostics.
Menu control the built-in accelerator.
Build option to default the system to 1 MHz.
The Apple //c memory card driver keeps certain information in the "screen holes" in main memory, which are required to use the memory card as a RAM disk. Should these screen hole values disappear, the card is re-initialized to empty when ProDOS boots. This happens even when the card is battery-backed and already has a RAM disk. The card data is not damaged until ProDOS boots, but if you attempt to manually boot the RAM disk it will say "UNABLE TO START FROM MEMORY CARD" because the screen hole values are not initialized.
This firmware enhancement identifies a ProDOS boot block on the RAM disk and, if found, restores the appropriate screen holes to make the RAM disk bootable and prevent firmware or ProDOS from re-initializing it.
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