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View Full Version : Four KS1.3 ROM chips in A1000?

arttu80
02-20-2011, 12:21 PM
So have ANYONE done it before? I'm planning to try to install these four kickstart 1.3 chips on A1000 motherboard;

http://aijaa.com/v.php?i=000967547655.jpg

My question is, are these jumper settings (which were originally posted by Computolio elsewhere in this forum) correct? --->

These are the default jumper settings (for the Kickstart loader boot ROM):

W1 = 1-2
W2 = 2-3
W3 = 2-3
W4 = 1-2
W5 = 1-2

And these are supposedly the settings for Kickstart in EPROM:

W1 = 1-2
W2 = 1-2
W3 = 2-3
W4 = 2-3
W5 = 1-2

Will this setup work, or do I need other mods? I know there are some kickstart adapters out there for A1000, but I would want to try these ROMs first.
arttu80
02-21-2011, 03:12 PM
Well, to add more discussion on this already crowded thread, I verified those stock jumper settings and came up that those on my PAL machine look little bit different...

W1 = 2-3
W2 = 2-3
W3 = 1-2
W4 = 1-2
W5 = 1-2

And this very fact make it even harder to try jumper setting given by Computolio... The other fact is that today I soldered two empty ROM sockets (at locations U5R and U5T) on my A1000 and now the freakin'thing refuses to boot! :( Power Led and keyboard Caps Led seem to function ok, but it gives me only black screen. So I'm little confused, how it's possible that two added EMPTY sockets are messing up this thing? No other mods were made...
TheBilgeRat
02-21-2011, 04:04 PM
I got nuttin, but i am curious why in the world you would want all those kickstarts?
save2600
02-21-2011, 04:12 PM
I got nuttin, but i am curious why in the world you would want all those kickstarts?
No, no, no... the 256k Kickstart is divided by four 64k chips. :(

@Arttu80, you 100% positive you didn't accidentally splash solder across something, causing a short?
TheBilgeRat
02-21-2011, 04:37 PM
No, no, no... the 256k Kickstart is divided by four 64k chips. :(

Yikes!
arttu80
02-21-2011, 10:36 PM
@Arttu80, you 100% positive you didn't accidentally splash solder across something, causing a short?

I really really tried to make sure there isn't any solder splashes around, so I triplechecked everything, but who knows, maybe there is some solder wandering. But is it possible, that Bootstrap ROMS would be destroyed in process, because of excessive heat, when I removed old solder spots where I opened up holes for sockets?