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Colecovision Replacement Motherboard 1.2


Megatron1999

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See the link in my signature. I need to get the expansion port working. Hopefully another prototype during winter sometime. Video options would be available from me, otherwise the F18A.

Maybe I need to change the board shape so it fits in a Jaguar shell. ;)

Edited by 5-11under
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See the link in my signature. I need to get the expansion port working. Hopefully another prototype during winter sometime. Video options would be available from me, otherwise the F18A.

Maybe I need to change the board shape so it fits in a Jaguar shell. ;)

it will be hard to fit the expension port in the jaguar shell

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See the link in my signature. I need to get the expansion port working. Hopefully another prototype during winter sometime. Video options would be available from me, otherwise the F18A.

Maybe I need to change the board shape so it fits in a Jaguar shell. ;)

Hi.

 

Any more details on Video Options??

 

Would/will there be:

 

TMS9918

TMS9928

TMS9929

V99x8 ??

 

Thanks

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Hi.

 

Any more details on Video Options??

 

Would/will there be:

 

TMS9918

TMS9928

TMS9929

V99x8 ??

 

Thanks

 

Probably... TMS9918 for composite, TMS9928 for component/YPbPr, F18A for VGA. I haven't investigated TMS9929. V99x8 I don't think I'm too interested in. Is it compatible by default?

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The V9938 and V9958 aren't even pin compatible with the TMS chips so no.

 

Not to mention that the 9938/58 are only *software* compatible with the 9918A/28/29 for well behaved software, and will not work with some games. I know from experience during F18A development that there are CV games out there that abuse the VDP register selection bits, and on a VDP with an expanded register set (like the 9938/58 and F18A) that will cause problems. The CV is what exposed this to me during F18A testing and the reason I had to introduce the register-lock protection on the F18A. The 9938/58 do not have such register protection and would end up with corrupt register settings.

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