Correct the Rev.5 signal routing bug by connecting Pin1 of the EPROM (A17) to Pin31 of the board's socket (famous Commodore 'oops'), where the address line A17 is located.The checklist for installment of EPROMs in Rev.5 Amiga 500 machines is as follows: My schematics refer the latter naming scheme. Please note that the address line naming in the Commodore schematics refers to byte addresses (A1-A18) while the EPROMs assume word addresses (A0-A17). So, in addition to the usual modifications concerning 512kB Kickstarts in Rev.5 Amiga 500s, the 18 address lines must be stabilized as well when EPROMs are used instead of Mask ROMs (e.g. That being said, while the outlined approach requires just a minimum of electronics, you get a maximum of two available Kickstart versions. Connect Pin 1 to a switch that either pulls the pin to GND or +5V. You just need to insert the EPROM chip into the socket such that the first pin (Pin 1 = side where the EPROM is indented) hangs out of the socket. As kipper2k already demonstrated on the EAB forums, such a dual Kickststart ROM can be easily installed into later revisions of the aforementioned machines. In my case, I performed the Byte Swapping directly in the Galep-5 tool on Windows (after verifying that the Galep-5 reads out original ROMs in byte swapped order).

Don't forget Byte Swapping if the burning is done on a LittleEndian Machine like the usual PCs. This file can then be burned into an EPROM. You just need to duplicate a 256k image, appended by a 512k image to one file (Unix/Linux/OSX: cat Kick13.rom Kick13.rom Kick31.rom >eprom_source.rom).

LhA Archiver/Unarchiver v1.It is quite easy to install such an EPROM into Rev.6A Amiga 500s, Amiga 500+ and Amiga 600. Switch Control 1.1a (for Ratte Auto Monitor Switch) The floppy disk image files are also suitable for use in floppy drive emulators (Cortex, DTX200, EMUFFD, Gotek, HxC, Mark II, etc.), which can be used to replace an Amiga floppy disk drive. An Amiga computer or dedicated PC hardware are required to write the images to Amiga floppy disks or other media. Important: the downloadable Floppy & Hard Disk Image Pack does not contain physical media.

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