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UNROM 8 IN 1 Multicartridge
https://forums.nesdev.com/viewtopic.php?f=9&t=11099
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Author:  tepples [ Sun Mar 16, 2014 12:36 pm ]
Post subject:  Re: UNROM 8 IN 1 Multicartridge

FARID wrote:
Quote:
I meant why not connect /ROMSEL instead of Q7 to its ↑CLK input?

Are you sure /ROMSEL remains stable enough to serve as a clock signal?

It's fine for detecting writes to the correct address. It's not so fine for a reset generator because a game could run in a loop in RAM. What we need to solve is the logic to unlock and clear the register on reset and lock it again before the game starts.

lidnariq wrote:
As long as the values written have [D3] clear, it should be fine...

To what extent are you willing to verify that? A ROM could as easily use $F8-$FF instead of $00-$07 and still conform to UNROM's API.

Author:  lidnariq [ Sun Mar 16, 2014 1:42 pm ]
Post subject:  Re: UNROM 8 IN 1 Multicartridge

Ohhhhhhhhhh, that's what I missed. Hah.

Author:  FARID [ Sun Mar 16, 2014 10:12 pm ]
Post subject:  Re: UNROM 8 IN 1 Multicartridge

lidnariq wrote:
Ohhhhhhhhhh, that's what I missed. Hah.


Are you answering me or tepples?

Author:  lidnariq [ Sun Mar 16, 2014 11:02 pm ]
Post subject:  Re: UNROM 8 IN 1 Multicartridge

You. I forgot that the multicart latch uses /LATCHENABLE to disable further writes and so can't be connected to R/W.

Author:  Ruslansh [ Sun May 18, 2014 6:42 am ]
Post subject:  Re: UNROM 8 IN 1 Multicartridge

this scheme can be changed so that it switches to 16 games?

Author:  Ruslansh [ Sun May 18, 2014 11:56 am ]
Post subject:  Re: UNROM 8 IN 1 Multicartridge

THIS IS MY COVER

Attachments:
SUPER-HIK-8-IN-1.jpg
SUPER-HIK-8-IN-1.jpg [ 209.04 KiB | Viewed 2445 times ]

Author:  lidnariq [ Sun May 18, 2014 12:13 pm ]
Post subject:  Re: UNROM 8 IN 1 Multicartridge

Ruslansh wrote:
this scheme can be changed so that it switches to 16 games?
Yes, but you'd need to add another 74'161. (Hook it up just like the one labelled "LATCH", but replace CPU D4..D6 with D0..D2 and PRG A17..A19 with A20..A22)

Author:  Ruslansh [ Sun May 18, 2014 12:18 pm ]
Post subject:  Re: UNROM 8 IN 1 Multicartridge

lidnariq wrote:
Ruslansh wrote:
this scheme can be changed so that it switches to 16 games?
Yes, but you'd need to add another 74'161. (Hook it up just like the one labelled "LATCH", but replace CPU D4..D6 with D0..D2 and PRG A17..A19 with A20..A22)


thank you!

Author:  FARID [ Mon May 19, 2014 4:23 am ]
Post subject:  Re: UNROM 8 IN 1 Multicartridge

@ Ruslansh
WOW, your cover beats mine! :D
I was suspicious already that it is still the year 1998, so it is right! :roll:
AFAlR there was a software bug (bus conflict) that prevent the first game (Rush'N Attack) from starting, for now I am not in the mood to fix it.

@ lidnariq
This is just the hardware aspect, still software must be modified to support another 8 new games!

Author:  lidnariq [ Mon May 19, 2014 11:35 am ]
Post subject:  Re: UNROM 8 IN 1 Multicartridge

FARID wrote:
@ lidnariq
This is just the hardware aspect, still software must be modified to support another 8 new games!
Absolutely!

Author:  zxbdragon [ Sun May 25, 2014 9:40 am ]
Post subject:  Re: UNROM 8 IN 1 Multicartridge

nestopia plus! working

Author:  FARID [ Sun May 25, 2014 11:48 am ]
Post subject:  Re: UNROM 8 IN 1 Multicartridge

zxbdragon wrote:
nestopia plus! working


Any download link?
It seems the latest version is "Nestopia Plus! 1.4.0.9 R55" by dragon2snow
But I couldn't download it from here :
http://www.nesbbs.com/bbs/thread-26133-1-1.html

Author:  zxbdragon [ Mon May 26, 2014 3:33 am ]
Post subject:  Re: UNROM 8 IN 1 Multicartridge

FARID wrote:
zxbdragon wrote:
nestopia plus! working


Any download link?
It seems the latest version is "Nestopia Plus! 1.4.0.9 R55" by dragon2snow
But I couldn't download it from here :
http://www.nesbbs.com/bbs/thread-26133-1-1.html

test version

Attachments:
NestopiaPlus! 1.4.0.9 R55.7z [1.19 MiB]
Downloaded 131 times

Author:  FARID [ Mon May 26, 2014 3:59 am ]
Post subject:  Re: UNROM 8 IN 1 Multicartridge

@ zxbdragon
Thanks
What about the iNES header number?

Author:  zxbdragon [ Mon May 26, 2014 4:40 am ]
Post subject:  Re: UNROM 8 IN 1 Multicartridge

FARID wrote:
@ zxbdragon
Thanks
What about the iNES header number?


MAKEUNIF

MAPR FARID_SLROM_8-IN-1


MAKEUNIF

MAPR FARID_UNROM_8-IN-1

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