Punchout palette logic poll

[2600]

Yeah, Nintendo made it nice and confusing.
Revision 1 = CHP1-02-XXX
No revision = CHP1-01-XXX

I honestly dont know if revision even matters, especially in regards to the color output section. I've seen traces cut and factory jumpers on the BAK boards to accommodate different ROMs/EPROMs. Different chips at 7J/7K/8J/8K/6J/6K.....all on the same version of the BAK board.

Edward

It matters enough to document for now. One main difference is the -02 uses 2564s and the -01 uses 2764s on the BAK board. And since we are talking about potential differences in the contents of those eproms, it would be helpful to know.

Plus I hate how all this stuff is usually half documented/interpreted, then spread down as gospel. I like facts.

 

[ELutz]

It matters enough to document for now. One main difference is the -02 uses 2564s and the -01 uses 2764s on the BAK board. And since we are talking about potential differences in the contents of those eproms, it would be helpful to know.

Plus I hate how all this stuff is usually half documented/interpreted, then spread down as gospel. I like facts.

Oh no, I'm with you. I was talking about actually having/seeing the differences between the schematics of 01 versus 02, of the BAK board. All three of my boards are the same version.....and they're all different. That's where "I don't think it matters" was coming from.

Regarding documenting all of this....hell yes! The BAK board is a nightmare because of all the undocumented stuff. And nice of Nintendo to color code the PROMs......pink or white......uh, yeah......pink turns to white after a few years (actually, it all usually turns....yellow).

Edward

 

[2600]

Ok, I"ve looked through my stash and believe I have dumped the BAK board revisions for PO.

Here's a quick summary, the Eproms come in two different versions(indicated with an a or b in pink) and so do the proms. The proms are a bit of a pain to figure out if they are the white or pink version. The Eprom data is inverted, but the proms are something else. I'll have to write everything up sometime and get the dumps out so people can repair boards correctly. I should be able to create the SPO revisions as well.

 

[ELutz]

Ok, I"ve looked through my stash and believe I have dumped the BAK board revisions for PO.

Here's a quick summary, the Eproms come in two different versions(indicated with an a or b in pink) and so do the proms. The proms are a bit of a pain to figure out if they are the white or pink version. The Eprom data is inverted, but the proms are something else. I'll have to write everything up sometime and get the dumps out so people can repair boards correctly. I should be able to create the SPO revisions as well.

This is excellent news!
If you want to look at any of my ROMs/EPROMs/PROMs....let me know. I'll have some time this week....I can pull them and ship them off to you.

Edward

 

[ajcrm125]

Ok, I"ve looked through my stash and believe I have dumped the BAK board revisions for PO.

Here's a quick summary, the Eproms come in two different versions(indicated with an a or b in pink) and so do the proms. The proms are a bit of a pain to figure out if they are the white or pink version. The Eprom data is inverted, but the proms are something else. I'll have to write everything up sometime and get the dumps out so people can repair boards correctly. I should be able to create the SPO revisions as well.

Exactly.. so since the graphic ROMs provide a partial address to the color proms, I bet what you will find is that for a given PROM's palette bank (there are 32 because we have 5 palette selection bits) the entire bank is flipped between revisions.
That is, for revision A lets say the data may look something like:

Address: Data
-------------
00: A
01: 3
02: 0
03: C
04: F
05: 2
06: 6
07: 1

In revision 2 it would look like this:

00: 1
01: 6
02: 2
03: F
04: C
05: 0
06: 3
07: A

Again I haven't confirmed this.. but makes sense given the schematic and your ROM dump. I suspect they had a shortage at some point on 74LS353's and then simply switched to 74LS153's and updated the graphic ROMs and PROMs.

 

[ajcrm125]

Incidentally if you have a particular graphic ROM set and a mismatched PROM set, you can remedy this by swapping out the 153's for 353's and vice versa.

 

[2600]

Yes, they are flipped. Haven't had time to write all this down since my last post, but that is basically it.

 

[ajcrm125]

Scratch that... I forgot that the entire address bus to the color proms is affected. That means the entire memory array is flipped.

 

[2600]

It's flipped in two banks.

 

[KI4SWY]

* Thread Resurrection *

Has this been fully documented anywhere yet?

Since 74LS353(s) don't really exist, what does it take to swap out the 353(s) to 153(s) ?

Just the Lower Monitor color prom replacements?

 

[2600]

* Thread Resurrection *

Has this been fully documented anywhere yet?

Since 74LS353(s) don't really exist, what does it take to swap out the 353(s) to 153(s) ?

Just the Lower Monitor color prom replacements?

I documented a lot of the Punchout PCB differences and what goes with what in this thread.

http://forums.arcade-museum.com/showthread.php?t=317809


Not sure if I got everything, but I had to do a brain dump as I was rediscovering stuff I had already discovered previously.