NVRAM DRIVE, (c)1995-2022 by Ralle Palaveev

128kB RAM required for writing.

Use hardware and/or software at your own risk. No warranty taken.
No responsibility taken for any untoward effects or damage to hardware of any kind.

The 4MB .PO file is the full firmware
The folder with x 512kB fileas are the firmware split for individual chips to be programmed with a programmer
The 5MB .HDV and the 140kB .DSK files contain the tools to be used with the card while in the Apple II

V34

The toos can format back-up and restore the NVRAM DRIVE
The 5MB disk has a full image of the current version and programs (version update)
The 140kB disk has only firmware to initialize the drive (version update)

Instructions:

1. Install NVRAM DRIVE in one slot
2. Mount the image in an emulator or floppy
3. Boot from the image and follow the instructions

Change log:

V36 - 16 Oct 2022, Interrupt disable added to subroutine for writing
V35 - 02 Oct 2022, Optimization of code
V34 - 14 Apr 2022, Fixed incompatibility with 64kB systems and some games (PoP)
V33 - 30 Mar 2022, Changed buffer to addresses $6000-$7100, $BF98 zeroed at startup
V30 - 20 Mar 2022, All ZP addresses are resotred after use
V29 - 19 Mar 2022, Fixed incompatibility when copying with Copy+
V28 - 05 Jan 2022, Initial official version
