Amiga Kickstart 3.1 ROM chip upgrade
I decided to order 3.1 ROM chips few weeks ago.
After having downloaded the ROMs not-so-legally for the past 15 years — seeing the actual chips felt kinda good.
My A1200 originally came with 3.0 (39.106). I’m not really sure about the in depth details between 3.0 and 3.1.
Here is the list of differences between modules contained in Kickstarts:
========================Kick3.0==Kick3.1== bootmenu 39.19 40.5 card.resource 37.11 40.4 carddisk.device 37.11 40.1 con-handler 39.8 40.2 console.device 39.28 40.2 dos.library 39.23 40.3 exec 39.47 40.10 expansion 39.7 40.2 filesystem.resource 39.2 40.1 filesystem 39.27 40.1 gadtools.library 39.356 40.4 graphics.library 39.89 40.24 (AGA) icon.library 39.3 40.1 input 37.12 40.1 intuition.library 39.2084 40.85 keymap.library 37.2 40.4 layers.library 39.61 40.1 mathffp.library 39.1 40.1 mathieeesingbas.library 37.3 40.4 ramlib 39.5 40.2 romboot 39.27 40.1 scsi.device 37.64 40.12 shell 39.13 40.2 trackdisk.device 39.4 40.1 utility.library 39.10 40.1 workbench.library 39.1 40.5
The official Commodore release notes are probably already lost in time.
The 3.1 contains bunch of bug-fixes, better support for WB 3.9 and the modern 4.X AmigaOS versions.
Kickstart 3.0 doesn’t support Amiga OS’s later than 3.1.
The installation is really simple, just locate the ROMs on the motherboard.
The ROM chips on my motherboard were a bit difficult to remove due to dirt and grime accrued into the sockets. If you have access to a tool specifically design to removing chips from sockets, use it.
Otherwise, just take your time to ease the chips out without using excessive force.
When socketing the replacement chips, make sure that all legs are aligned properly before pushing the chip into the socket. It takes surprisingly little force to push the chips in.
Interesting to see that the leftmost pins of the sockets are not populated. Maybe there is some folklore available about this design decisions?
Amiga boots just fine, but seems that it takes a bit longer than with the older 3.0 ROMs.
The 3.1 actually adds some start-up delay for checking available hard drives to get around some 3.0 related bug.
Amiga 3.X ROMs are also available for purchase these days. I didn’t see the need to grab those — the changes are not really that relevant, and I wanted to maximise the compatibility with the old games and software.
Additionally I like to remain in the 90’s when it comes to Amiga platform 😉
Kickstart ROMs explained.