Kickstart 3,1 in Ver 5 A500

[webmany]

Is there a dummies version of a how to for altering the kickstart rom to work in a REV 5 A500?

We are talking, which is pin 1 dummy.

Picked up kipper2ks new board and a 3.1 kickstart rom from amikit, then found out that it needs to be altered to work.

[Vot]

Ask kipper2k himself he's on this forum and I'm guessing pretty clued up on what has to be done.

[kipper2k]

Originally Posted by webmany

Is there a dummies version of a how to for altering the kickstart rom to work in a REV 5 A500?

We are talking, which is pin 1 dummy.

Picked up kipper2ks new board and a 3.1 kickstart rom from amikit, then found out that it needs to be altered to work.

Here is a link to some info for you

[url]https://groups.google.com/forum/#!topic/comp.sys.amiga.hardware/xSYX8OgeU5E[/url

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this is info from that link

For the record, the CORRECT way to install the KS3.1 ROM in a rev 5 A500 is:

Bend pin 31 of ROM out.
Solder wire from ROM pin 21 to bent-up pin 31 of ROM.
Attach wire from pin 1 to pin 31 of SOCKET.
Install ROM so ROM pin 31 does not contact SOCKET pin 31.

At first, I built a "ROM tower" to carry the pin 1-31 connection, but
then I got a Blizzard Turbo Memory board for the A500 and the ROM tower
was too tall. Instead, I've since been running with a piece of wire-wrap
wire wedged into the pin 1 and pin 31 holes of the socket...

Works perfectly for me.
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here is some info ifound on pin numbering that Pwowler listed...

http://electronicsclub.info/ics.htm

[Jope]

The reason why this was even up for debate back then was, that the modification for EPROMs is different than the modification for mask ROMs.

For a mask ROM (2.04 upgrade) it's enough to solder a wire from 1 to 31. For an EPROM it's not enough, as the EPROM uses pin 31 to determine 8 vs 16 bit operation. If you don't take care that the EPROM is always in 16-bit mode, it no workee. :-)

Naturally people already knew about the mask ROM modification from the 2.04 days and that info was constantly brought up as a recipe for the EPROMs as well. People had to be educated. :-)