Author Topic: 4MB external ram expansion will be soon. (Read 6839 times)

Kris · « **Reply #75 on:** 15:11, 25 January 18 »

It would be definitively a great achievement if this device could be compatible with Old & Plus machines...

Piotr · « **Reply #76 on:** 23:07, 27 January 18 »

4mb is for sale here, https://www.sellmyretro.com/offer/details/30373 .

LambdaMikel · « **Reply #77 on:** 23:55, 27 January 18 »

Will it block sight of DDI3 display?

Piotr · « **Reply #78 on:** 00:28, 28 January 18 »

No, is also space for case but i print it tomorrow.

Rennert · « **Reply #79 on:** 11:19, 28 January 18 »

Quote from: Piotr on 23:07, 27 January 18

4mb is for sale here, https://www.sellmyretro.com/offer/details/30373 .

is this for mx4 board?

GUNHED · « **Reply #80 on:** 20:55, 30 January 18 »

Yes, a MX4 version would be neat!

Piotr · « **Reply #81 on:** 08:14, 31 January 18 »

Ok, 4mb working now with CPC PLUS. Version for MX board is on the way from PCB factory .

Bryce · « **Reply #82 on:** 09:28, 31 January 18 »

Quote from: Piotr on 08:14, 31 January 18

Ok, 4mb working now with CPC PLUS. Version for MX board is on the way from PCB factory .

And what needed to be changed to get it working?

Bryce.

Piotr · « **Reply #83 on:** 09:58, 31 January 18 »

Nothing, my 464 plus was broken

GUNHED · « **Reply #84 on:** 02:24, 01 February 18 »

Quote from: Piotr on 08:14, 31 January 18

Ok, 4mb working now with CPC PLUS. Version for MX board is on the way from PCB factory.

These are great news!!! I will definitely get the MX4 version :-) Just saving some space (my CPC's got Centronics ports).

Skunkfish · « **Reply #85 on:** 11:35, 01 February 18 »

Colour me interested in an MX4 version...

What software uses more than 512KB currently? Does SymbOS already support the full 4MB?

Shaun M. Neary · « **Reply #86 on:** 13:28, 01 February 18 »

Quote from: Skunkfish on 11:35, 01 February 18

Colour me interested in an MX4 version...

What software uses more than 512KB currently? Does SymbOS already support the full 4MB?

I don't think it presently supports more than 512K. I think @Prodatron is working on a version that supports 1MB though, but don't take that as gospel.

Vyper68 · « **Reply #87 on:** 20:46, 03 February 18 »

How can a 464 or 6128 actually use 4MB that is an awful lot of bank switching innit.

Piotr · « **Reply #88 on:** 21:53, 05 February 18 »

Mother x4 version ready

Is listed on Sell my retro.

Rennert · « **Reply #89 on:** 22:38, 05 February 18 »

Quote from: Piotr on 21:53, 05 February 18

Mother x4 version ready Is listed on Sell my retro.

Bought

GUNHED · « **Reply #90 on:** 18:44, 06 February 18 »

Great! Will get some now...

Kris · « **Reply #91 on:** 10:31, 14 February 18 »

Just received mine, it works perfectly !

LambdaMikel · « **Reply #92 on:** 19:46, 21 February 18 »

Mine arrived today - A-ha demo works great, but Batman Group demo stalls when the bats fly through the window / shatter the glass. Does Batman Demo work for people on 464 with 4 MB? It works perfectly fine with XMem, but not with my 4 MB extension. I have the non-m4x version.

LambdaMikel · « **Reply #93 on:** 07:07, 22 February 18 »

Quote from: LambdaMikel on 19:46, 21 February 18

Mine arrived today - A-ha demo works great, but Batman Group demo stalls when the bats fly through the window / shatter the glass. Does Batman Demo work for people on 464 with 4 MB? It works perfectly fine with XMem, but not with my 4 MB extension. I have the non-m4x version.

464 is really difficult to get it to work reliably. Batman demo almost ran through now, but crashed in the last part of the demo... where the Tron scroller is. With mother4x motherboard I haven't succeeded yet. Maybe I need a bus driver card or the like? I have the DDI3 directly hooked up behind the 4 MB extension. That *amost* works. 464 is really not optimal in that regard. The connection is too brittle. But it seems this is not the fault of Piotr's extension - maybe the timing is a bit more critical than with XMem, which seems to be a b it more reliable. Anyways, it (almost) works with Batman.

LambdaMikel · « **Reply #94 on:** 07:26, 22 February 18 »

I am using the one disk version from here:
https://files.scene.org/view/parties/2011/forever11/cpc/demo/batman_forever.zip

Sometimes, it crashes badly and turns on the relay of the cassette recorder....
Piotr will send me the M4X version, I will see if that works better with my 464's.

Vyper68 · « **Reply #95 on:** 09:40, 22 February 18 »

Quote from: LambdaMikel on 07:07, 22 February 18

464 is really difficult to get it to work reliably. Batman demo almost ran through now, but crashed in the last part of the demo... where the Tron scroller is. With mother4x motherboard I haven't succeeded yet. Maybe I need a bus driver card or the like? I have the DDI3 directly hooked up behind the 4 MB extension. That *amost* works. 464 is really not optimal in that regard. The connection is too brittle. But it seems this is not the fault of Piotr's extension - maybe the timing is a bit more critical than with XMem, which seems to be a b it more reliable. Anyways, it (almost) works with Batman.

Maybe you would have been better to get the 512K Expansion you solder onto the DDI-3 - but that would limit it to the 464 and i don't know your set-up.

arnoldemu · « **Reply #96 on:** 10:55, 22 February 18 »

Quote from: LambdaMikel on 07:07, 22 February 18

464 is really difficult to get it to work reliably. Batman demo almost ran through now, but crashed in the last part of the demo... where the Tron scroller is. With mother4x motherboard I haven't succeeded yet. Maybe I need a bus driver card or the like? I have the DDI3 directly hooked up behind the 4 MB extension. That *amost* works. 464 is really not optimal in that regard. The connection is too brittle. But it seems this is not the fault of Piotr's extension - maybe the timing is a bit more critical than with XMem, which seems to be a b it more reliable. Anyways, it (almost) works with Batman.

Would you mind running a test for me? I may be able to identify where the incompatibility lies.

4mb or 2mb or 1mb may not work on some programs because to make a 4mb expansion they use other bits in the i/o space which can clash with other hardware.

LambdaMikel · « **Reply #97 on:** 16:39, 22 February 18 »

Quote from: arnoldemu on 10:55, 22 February 18

Would you mind running a test for me? I may be able to identify where the incompatibility lies.

4mb or 2mb or 1mb may not work on some programs because to make a 4mb expansion they use other bits in the i/o space which can clash with other hardware.

I can run a test, no problem! What is the test?

GUNHED · « **Reply #98 on:** 16:45, 23 February 18 »

Quote from: arnoldemu on 10:55, 22 February 18

Would you mind running a test for me? I may be able to identify where the incompatibility lies.

I can do that too. So you get a 2nd result to compare.

Just email me the DSK

Rennert · « **Reply #99 on:** 17:23, 23 February 18 »

Quote from: GUNHED on 16:45, 23 February 18

I can do that too. So you get a 2nd result to compare. Just email me the DSK

I would like to test it. Have some issues in KC Compact, on CPC6128 all fine

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Author Topic: 4MB external ram expansion will be soon. (Read 6839 times)