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PostPosted: Sat Jul 27, 2019 2:23 am 
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Joined: Fri Oct 16, 2015 6:18 am
Posts: 48
Quote:
A0-A15 -> A0-A15 (obviously)
CE -> CS (Pin 5 of edge connector)


This doesn't look right to me. Cartridge connector ~CS is not a chip select signal for a ROM, and if you use it like that, you can cause hardware damage because there will be bus contention with the work RAM chip.
But since you haven't yet booted an actual game, I think you should be ok because I don't think the boot ROM reads work RAM.

Also, if you don't have a mapper chip, you can only have 32 kB of ROM which means A0-A14 pins can be connected, but A15 should be permanently tied to VCC or GND.
So this is not a correct assumption:

Quote:
As far as I can tell I should be able to load a 64KB game off a W27C512 without issue


You will never be able to have a 64 kB game without a mapper chip / banking method of some sort.



This reply to has some more information:
http://gbdev.gg8.se/forums/viewtopic.php?pid=3625#p3625

And here's a schematic for a 32 kB cart for reference: (note that the flash chip is 1Mbit and unused address pins are tied to VCC!)
https://github.com/Gekkio/gb-hardware/b ... T32K-A.pdf


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PostPosted: Sat Jul 27, 2019 12:00 pm 
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Joined: Sun Apr 13, 2008 11:12 am
Posts: 8532
Location: Seattle
Stryder99x wrote:
CE -> CS (Pin 5 of edge connector)
Specifically on the game boy, "CS" is roughly an inverted copy of A15. (There are some differences, but it's easiest to think of it that way)

The MBCs use "CS" and A14 to find the region where the cart can place RAM.


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