Diamond GOS 3.0

[BillC]

51 minutes ago, Peri Noid said:

Ok, so it's a bit different banking scheme and therefore it's not possible te reuse the same hardware without changes in control logic. I'll just keep using the universal carts I have. 

The SDX cartridge uses a GAL for the logic, it should be possible by changing the ROM and an updated GAL together, unfortunately the GAL is not socketed.

 

 

[Peri Noid]

7 minutes ago, BillC said:

The SDX cartridge uses a GAL for the logic, it should be possible by changing the ROM and an updated GAL together, unfortunately the GAL is not socketed.

 

 

No socket is not a problem, I can desolder GAL and install a socket. But I'd need to have a proper GAL code, which I don't have. That's a problem.

[Wrathchild]

@classics / AtariMax had done a v2.0 ROM for the AtariMax 128KB model as effectively the bank scheme is the same with different port access and so the $D5xx access can be remapped it's model, however I have read on this or the other 3.0 thread that this can then make it conflict with other models if used in a pass-through way. However if you are using it stand-alone then that would be an option.

[kenames99]

10 hours ago, Peri Noid said:

No socket is not a problem, I can desolder GAL and install a socket. But I'd need to have a proper GAL code, which I don't have. That's a problem.

I have remade the GAL logic and have them available.

 

Ken

 

[BillC]

11 hours ago, Wrathchild said:

@classics / AtariMax had done a v2.0 ROM for the AtariMax 128KB model as effectively the bank scheme is the same with different port access and so the $D5xx access can be remapped it's model, however I have read on this or the other 3.0 thread that this can then make it conflict with other models if used in a pass-through way. However if you are using it stand-alone then that would be an option.

There would be a conflict if using it with a stock SDX cartridge or an Incognito/U1MB/intSDX modified computer, but the bitsofthepast Super SDX cartridge changed the $D5XX banking logic to match that of the SIDE2 cartridge. 

 

This means the Diamond GOS ROM on an ICD SDX board with original GAL should work concurrently with a Super SDX board, this should also apply to a multicart version of Diamond GOS.

 

Correction: The original Diamond GOS ROM probably wouldn't work since the GAL logic doesn't match the ROM, but a ROM modified to use the SDX banking logic would. This modified Diamond GOS ROM is likely that used in the Atarimax Maxflash cartridge multicart images.

Edited February 10, 2021 by BillC

[Gunstar]

Ok, so I have the Super SDX cartridge from @Dropcheck, currently upgraded to 4.8, planning to upgrade it top 4.9 soon, and I have the reproduction Diamond 3.0 from @kenames99 with his upgraded GAL logic. So will I be able to use these concurrently?

 

Also, assuming they will work together, do I plug Diamond cart into the pass-thru of SDX cart, or vice-versa? (I made a custom case by modifying my original The!Cart case I had on hand as I had moved The!Cart into an original 800 style cart shell I also modified)

 

I'll also planning on using my MyIDE II CF card drive with both, currently sitting atop the SSDX cart and working well with FJC's boot driver for SDX & MyIDE II.  Has anyone yet tried a MyIDE II or SiDE 2/3 or other SD card cart drive with Diamond 3.0 cart and SDX cart all together yet? Has anyone else made labels for Diamond GOS 3.0 carts yet?

 

My 1200XL currently isn't working, so I haven't been able to test any of this on my own yet, so I just thought I'd ask. I'll have my 1200XL running again in the near future and have been thinking about getting it all working together. @kenames99's cart PCB for Diamond is so short I cut The!Cart cart case nearly in half to make it work, and it's completely hidden inside the 1200XL's cart slot! Of course if I have to plug Diamond into SDX, then all three carts will be showing...

 

 

 

 

Edited September 16, 2021 by Gunstar

[flashjazzcat]

Diamond goes into the SDX cart, since SDX has control of the external cartridge select lines. As for SIDE3: it will emulate the Diamond cart type anyway, so the physical Diamond cart would be redundant in that scenario.

 

[Peri Noid]

56 minutes ago, flashjazzcat said:

As for SIDE3: it will emulate the Diamond cart type anyway, so the physical Diamond cart would be redundant in that scenario.

 

Do you have any hint how to combine Diamond cart AND U1MB+Side3 mounted Diamond GOS floppies? I wonder, if it's possible...

[flashjazzcat]

25 minutes ago, Peri Noid said:

Do you have any hint how to combine Diamond cart AND U1MB+Side3 mounted Diamond GOS floppies? I wonder, if it's possible...

I see no reason why not, with hard disk partitions thrown in. Mount disk media as required in the loader, mount the cartridge, and everything should work.