How to tell if CNROM has 16kB or 32kB PRG? what's CL & SL?

Discuss emulation of the Nintendo Entertainment System and Famicom.

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Petruza
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How to tell if CNROM has 16kB or 32kB PRG? what's CL & SL?

Post by Petruza » Sun Sep 10, 2017 4:34 pm

Looking at the Wiki https://wiki.nesdev.com/w/index.php/CNROM, I see that CNROM can have 16kB or 32kB PRG.
I guess the way to tell which is described here:
16 KB PRG ROM : 'SL' connected, 'CL' disconnected.
32 KB PRG ROM : 'SL' disconnected, 'CL' connected.
What are SL and CL? are those in the iNES header?

Disch's mapper documents don't say anything about this.

tepples
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Re: How to tell if CNROM has 16kB or 32kB PRG? what's CL & S

Post by tepples » Sun Sep 10, 2017 4:36 pm

SL and CL are solder pads on the PCB. There is no dedicated field for them in the header apart from ROM size being 1 or 2 16K units.

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Petruza
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Re: How to tell if CNROM has 16kB or 32kB PRG? what's CL & S

Post by Petruza » Mon Sep 11, 2017 6:00 am

Oh right, so even for carts that switch whole 32kB PRG banks the iNES header will count them in units of 16kB, right?
Thanks!

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