PDA

View Full Version : Will these fit anything Amiga?



Tajmaster
24th January 2012, 19:08
Hi All

I got hold of some old telecoms equipment which has 2 interesting bits on.

a 68010 CPU which looks like it will drop right into an A500/+/A2000
2 EEPROM chips.

My question is, are these 2 EEPROM chips of any use for application on anything Amiga? eg updating a ROM on a Zorro card etc

commodorejohn
24th January 2012, 19:13
The 68010's a drop-in replacement for a 68000, yeah, and can provide a (very) moderate speed boost (nothing like what you'd get with a proper accelerator, but still.)

fitzsteve
24th January 2012, 19:14
The 68010's a drop-in replacement for a 68000, yeah, and can provide a (very) moderate speed boost (nothing like what you'd get with a proper accelerator, but still.)

And WHDLoad Quit Key will work :)

Not sure if it affects backwards compatibility on Floppy based games though...

Tajmaster
24th January 2012, 19:20
Thanks guys, I pretty much guessed that :) Its the EEPROMs Id really like to know about, it seems a shame to throw them away :thumbsdown:

EDIT: Just to be clear, I read that back and I sounded like I was being ungrateful :oops: Sorry if it came off like that, no offense was intended :)

commodorejohn
24th January 2012, 19:23
Well, if they're really EEPROMs, they're bound to be useful to someone, even if they don't fit anything Amiga-related.

Merlin
24th January 2012, 19:23
They are probably 27C Series EEPROMS, but you won't know for certain unless you peel the labels off; if the information on them is no great loss, then go for it and let's see what the mystery chips are....

Tajmaster
24th January 2012, 19:25
They are probably 27C Series EEPROMS, but you won't know for certain unless you peel the labels off; if the information on them is no great loss, then go for it and let's see what the mystery chips are....

Im peeling the labels off as we type :D

Ed.D
24th January 2012, 19:26
I wonder what value those oscilators are? :) ...might be useful for a future project for somebody.

Merlin
24th January 2012, 19:28
*Suspense*

Tajmaster
24th January 2012, 19:30
Pic attached of the chip with that label peeled back :thumbsup:

Tajmaster
24th January 2012, 19:30
I wonder what value those oscilators are? :) ...might be useful for a future project for somebody.

They are:

4.9MHz
7MHz
32.7MHz

Merlin
24th January 2012, 19:41
27C4001....

4Mb 512Kb x 8 UV EPROM and OTP EPROM, 32-pin DIP.

http://www.farnell.com/datasheets/7903.pdf

They could be useful if they aren't one-time programmed.... I suspect that they are OTP ones though.

Tajmaster
24th January 2012, 19:43
Mine have little windows under the stickers, does that mean they can be re-used? Is there anything Amiga related that uses these types of chips?

Merlin
24th January 2012, 19:45
Yup; that means that they are UV erasable and re-usable...;)

That's a good find!!

You could use them to make a ROM switcher, I think, by programming different Kickstarts at the different addresses them tying address pins high or low to select them.

TheCorfiot
24th January 2012, 21:35
Those eproms have a different pinout to the c400/c800, that miggys use though

TC ;)

Tajmaster
24th January 2012, 22:56
Thanks guys :) Ill pull the chips out and out them in the "hoard this crap" pile :lol:

rkauer
25th January 2012, 00:32
The 32.7MHz crystal can be used to overclock something. :)

Dazxy2001
25th January 2012, 20:09
The 2 30pin simms may come in handy for something too I guess :)