A600 8Mb fast expansion

[tokyoracer]

No I mean will it work along side my 1Mb expansion?

[rkauer]

tokyoracer wrote:
No I mean will it work along side my 1Mb expansion?

 Indeed! If you use this board as a 8Mb expansion, you'll have 10Mb of total RAM.

 If used it setted to 4Mb, expect to have 6Mb.

[Colani1200]

lordv wrote:

Another improvement is no need to tilt overCPU socket (instead, the board itself is two-level).

Could you explain that a little further? How will the new version be connected?

PS: Great job, but I guess I already said that  :-P

[1NOM155]

can this be apply to A500, with full 8mb?

[rkauer]

1NOM155 wrote:
can this be apply to A500, with full 8mb?

 Of course it can! But you have to modify the 68000 connector to use a DIL socket (wired, perhaps?).

 Or make a new designed board.

 But the schematics will not change a single bit.

[1NOM155]

rkauer wrote:

1NOM155 wrote:
can this be apply to A500, with full 8mb?

 Of course it can! But you have to modify the 68000 connector to use a DIL socket (wired, perhaps?).

 Or make a new designed board.

 But the schematics will not change a single bit.

and can i use the full 8mb ram, without lose anything? A500 don't have PCMCIA, but i wont to use a mod for IDE.

[orange]

@lordv
I don't see the price on your web page for version with the RAM chips, do you make that one?

[kolla]

Say.. how about a similar RAM upgrade for CD32?

No PCMCIA disturbing there, and a slot ready :-)

[1NOM155]

In the A500 and A600 uses a MC68K, on ACD32 uses an MC68EC020, the connections points aren't the same.

[TjLaZer]

I would like to buy one of the newer versions let me know when I can.

[lordv]

Colani1200:

Could you explain that a little further? How will the new version be connected?

The same way, but the board will be two level, so that no need to tilt the socket when soldering it, also better cooling of CPU and chipset beneath the board. It looks like this: http://dlcorp.ucoz.ru/_fr/1/3207130.jpg http://dlcorp.ucoz.ru/_fr/1/3208886.jpg


Regarding A500, it probably should work, but I haven't A500 to check. Probably new version would be easier to adapt for A500.

[1NOM155]

lordv wrote:
Colani1200:

Could you explain that a little further? How will the new version be connected?

The same way, but the board will be two level, so that no need to tilt the socket when soldering it, also better cooling of CPU and chipset beneath the board. It looks like this: http://dlcorp.ucoz.ru/_fr/1/3207130.jpg http://dlcorp.ucoz.ru/_fr/1/3208886.jpg


Regarding A500, it probably should work, but I haven't A500 to check. Probably new version would be easier to adapt for A500.

lordv, i have 3 A500, i can test on one

the new PCB, its great, because "on future" can be use on every Amigas with 68K CPU, just have to change CPU connector.

[lordv]

1NOM155 wrote:

the new PCB, its great, because "on future" can be use on every Amigas with 68K CPU, just have to change CPU connector.

Well, not on every 68k, but definitely on every 68000 =)
68020 has completely different bus. To make things worse, A1200 /DSACKs every empty memory space hole, so one have to either overtake /DSACK signals on the A1200 trapdoor (thus making short-circuiting for motherboard DSACK drivers) or work without any wait states. It is almost impossible for 14MHz 2cycle accesses with ordinary 70ns DRAMs.

[1NOM155]

yes i know, lol i don't route correctly, eheh, when i said MC68K, i may say only the 68000 version.
This can be applied to A1000, 2000 & variants, 500, 600, CDTV?

Lordv, another thing, this expansion, can take any advantaged of the A600 trapdoor? Or the trapdoor can be only used for 1mb chip ram?

[rkauer]

 A600's trapdoor don't have CPU lines, only CAS/RAS and chip memory address bus, plus the reset signal (good to put a reset button), RTC and audio lines.

[rkauer]

 Just another question.

 Do I need to relocate the hd of the A600 with this new design, like the old one?