UNROM 8 IN 1 Multicartridge

Discuss hardware-related topics, such as development cartridges, CopyNES, PowerPak, EPROMs, or whatever.

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tepples
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Re: UNROM 8 IN 1 Multicartridge

Post by tepples »

FARID wrote:
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.
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Re: UNROM 8 IN 1 Multicartridge

Post by lidnariq »

Ohhhhhhhhhh, that's what I missed. Hah.
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FARID
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Re: UNROM 8 IN 1 Multicartridge

Post by FARID »

lidnariq wrote:Ohhhhhhhhhh, that's what I missed. Hah.
Are you answering me or tepples?
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Re: UNROM 8 IN 1 Multicartridge

Post by lidnariq »

You. I forgot that the multicart latch uses /LATCHENABLE to disable further writes and so can't be connected to R/W.
Ruslansh
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Re: UNROM 8 IN 1 Multicartridge

Post by Ruslansh »

this scheme can be changed so that it switches to 16 games?
Ruslansh
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Re: UNROM 8 IN 1 Multicartridge

Post by Ruslansh »

THIS IS MY COVER
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SUPER-HIK-8-IN-1.jpg
lidnariq
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Re: UNROM 8 IN 1 Multicartridge

Post by lidnariq »

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)
Ruslansh
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Re: UNROM 8 IN 1 Multicartridge

Post by Ruslansh »

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!
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FARID
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Re: UNROM 8 IN 1 Multicartridge

Post by FARID »

@ 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!
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Re: UNROM 8 IN 1 Multicartridge

Post by lidnariq »

FARID wrote:@ lidnariq
This is just the hardware aspect, still software must be modified to support another 8 new games!
Absolutely!
zxbdragon
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Re: UNROM 8 IN 1 Multicartridge

Post by zxbdragon »

nestopia plus! working
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FARID
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Re: UNROM 8 IN 1 Multicartridge

Post by FARID »

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
zxbdragon
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Re: UNROM 8 IN 1 Multicartridge

Post by zxbdragon »

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
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NestopiaPlus! 1.4.0.9 R55.7z
(1.19 MiB) Downloaded 425 times
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FARID
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Re: UNROM 8 IN 1 Multicartridge

Post by FARID »

@ zxbdragon
Thanks
What about the iNES header number?
zxbdragon
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Re: UNROM 8 IN 1 Multicartridge

Post by zxbdragon »

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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