Q:Commodore A3640 tinkering - Watch out I have boing balls!
- Thread starter arnljot
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Re: Q:Commodore A3640 tinkering - Watch out I have boing balls!
Just remember: if your board is the crappy 3.0 version, forget about it!
The only upgrade you can do on the 3.0 board is replace the EC/LC CPU for a full 040.
BTW: you cannot overclock a 25MHz unit to 40MHz! You'll end with a very broken CPU. 25MHz can be overclocked to 28MHz, tops. 33MHz units can go to 36~38MHz and 40MHz units can go up to 44~48MHz.
Just remember: if your board is the crappy 3.0 version, forget about it!
The only upgrade you can do on the 3.0 board is replace the EC/LC CPU for a full 040.
BTW: you cannot overclock a 25MHz unit to 40MHz! You'll end with a very broken CPU. 25MHz can be overclocked to 28MHz, tops. 33MHz units can go to 36~38MHz and 40MHz units can go up to 44~48MHz.
Re: Q:Commodore A3640 tinkering - Watch out I have boing balls!
I have no idea what version it is. It has no sticker on U209.
It just reads:
TI
22V10-10CFN
40307XWAF
Is there any software way to tell?
I have no idea what version it is. It has no sticker on U209.
It just reads:
TI
22V10-10CFN
40307XWAF
Is there any software way to tell?
Re: Q:Commodore A3640 tinkering - Watch out I have boing balls!
Comparing pictures at amiga.resource.cx and bboah.com, it seems that I have a V3.1, heatsink and other stickers match up with the 3.1 version, the 3.0 and 3.2 version stickers differs. If it's anything to go by...
Comparing pictures at amiga.resource.cx and bboah.com, it seems that I have a V3.1, heatsink and other stickers match up with the 3.1 version, the 3.0 and 3.2 version stickers differs. If it's anything to go by...
Re: Q:Commodore A3640 tinkering - Watch out I have boing balls!
BTW, here is another useful link with a bit more information (and a crappiest photo). :wink:
If you find a MC68040 (not the fry-an-egg XC68040), you can overclock even the 25MHz over 40MHz without issues (on 3.1 and 3.2 boards).
Your board don't have any sticker? All chips have the -01 sticker (but the CPU), only U204 have the -02/-03 sticker. Also there is the version printed on the board, near the socket.
BTW, here is another useful link with a bit more information (and a crappiest photo). :wink:
If you find a MC68040 (not the fry-an-egg XC68040), you can overclock even the 25MHz over 40MHz without issues (on 3.1 and 3.2 boards).
Your board don't have any sticker? All chips have the -01 sticker (but the CPU), only U204 have the -02/-03 sticker. Also there is the version printed on the board, near the socket.
Re: Q:Commodore A3640 tinkering - Watch out I have boing balls!
I was planning to buy a 40mhz 040 (XC68040RC40M). And then put a 80mhz crystal on the board in place of the 50mhz crystal that's there.
But the only text I've found so far which suggests that it can be done is here: "Overclocking the Commodore A3640"
So, I realise it's pretty thin... So, does any one know - can it be done?
Edit: You beat me to it with the link... :-D
rkauer said:
I was planning to buy a 40mhz 040 (XC68040RC40M). And then put a 80mhz crystal on the board in place of the 50mhz crystal that's there.
But the only text I've found so far which suggests that it can be done is here: "Overclocking the Commodore A3640"
Overclocking the Commodore A3640 said:
So, I realise it's pretty thin... So, does any one know - can it be done?
Edit: You beat me to it with the link... :-D
Re: Q:Commodore A3640 tinkering - Watch out I have boing balls!
Ah, crap. I've only found an XC - I'll continue to scout for an MC then.
Aha! I do have a 3.1 board
rkauer said:
Ah, crap. I've only found an XC - I'll continue to scout for an MC then.
U401, U208, U207, U213, U203 and U400 have stickers. They all say "*-01" and stuff like "exlat", "term" "mapper", "rst", "lebus" and "oebus".rkauer said:
rkauer said:
Aha! I do have a 3.1 board
Re: Q:Commodore A3640 tinkering - Watch out I have boing balls!
@arnljot
get yourself an MC68040 full core @ 40mhz m8, much cooler!!! (XC's are toasty chippies)
once you have all your kit PM me, I am sure I can help. I have a 33mhz 040 version of the A3640 that I will do this mod too as well me thinks
@arnljot
get yourself an MC68040 full core @ 40mhz m8, much cooler!!! (XC's are toasty chippies)
once you have all your kit PM me, I am sure I can help. I have a 33mhz 040 version of the A3640 that I will do this mod too as well me thinks
Re: Q:Commodore A3640 tinkering - Watch out I have boing balls!
TC's ears perk up
Zetr0 said:@arnljot
get yourself an MC68040 full core @ 40mhz m8, much cooler!!! (XC's are toasty chippies)
once you have all your kit PM me, I am sure I can help. I have a 33mhz 040 version of the A3640 that I will do this mod too as well me thinks
TC's ears perk up
Re: Q:Commodore A3640 tinkering - Watch out I have boing balls!
Yeah, I googled and "040 68040 +otherbay", and checked .hk, .ca, .com, .de, .ca, .co.uk, .sg and .my Nada. Just those embeded ones. And two were sufrace mount types. And one PGA at 33mhz. Going from 33 to 40, isn't maybe much. But I'd rather be "purist" on a hack like this.
Yeah, I googled and "040 68040 +otherbay", and checked .hk, .ca, .com, .de, .ca, .co.uk, .sg and .my Nada. Just those embeded ones. And two were sufrace mount types. And one PGA at 33mhz. Going from 33 to 40, isn't maybe much. But I'd rather be "purist" on a hack like this.
Re: Q:Commodore A3640 tinkering - Watch out I have boing balls!
From my experiences.........
Not sure the A3640 is actually capable of a 40Mhz CPU anyway, even if you fit a 40Mhz CPU part....
The reason being, the mod shown here by rkauer is NOT needed for swapping a Crystal & O/C-ing the CPU. How fast you can go depends on the "Quality" of your CPU,
My Rev 3.1 040 clocked to 33Mhz without wires traced all over the place.....
I guess plugging in a 40Mhz CPU & a 80Mhz X-Tal is the only thing to do for being sure!
XC or MC doesn't matter imo. The 040 even @ 25Mhz is better suited with a Fan/Heatsink combo in an A4KD anytime. In an A4KT, you might get away with Passive 40Mhz CPU, but this depends on Air flow through the case & I suspect a bog standard A4KT is not going to cut the cloth. :wink:
Kin
From my experiences.........
Not sure the A3640 is actually capable of a 40Mhz CPU anyway, even if you fit a 40Mhz CPU part....
The reason being, the mod shown here by rkauer is NOT needed for swapping a Crystal & O/C-ing the CPU. How fast you can go depends on the "Quality" of your CPU,
My Rev 3.1 040 clocked to 33Mhz without wires traced all over the place.....
I guess plugging in a 40Mhz CPU & a 80Mhz X-Tal is the only thing to do for being sure!
XC or MC doesn't matter imo. The 040 even @ 25Mhz is better suited with a Fan/Heatsink combo in an A4KD anytime. In an A4KT, you might get away with Passive 40Mhz CPU, but this depends on Air flow through the case & I suspect a bog standard A4KT is not going to cut the cloth. :wink:
Kin
Re: Q:Commodore A3640 tinkering - Watch out I have boing balls!
This is the way I plan to go. And now, by your reccomendation seeing as this is planned to go into a desktop model, also with a fan and heatsink too now.
Kin Hell said:
This is the way I plan to go. And now, by your reccomendation seeing as this is planned to go into a desktop model, also with a fan and heatsink too now.