NES Zelda Multicart

[MottZilla]

Well I found this link that is done by the same person as the link above:

http://callanbrown.com/index.php/super- ... -multicart


I wired up the multi cart with all the zeldas, just like the link above, minus the wires to the chr, since the zeldas only use prg replacement. Game boots, but does not switch games when you h it reset?

This one you linked will only work on the Front Loading "toaster" NES model. It uses a reset signal on the CIC to clock the 74*161 chip.

[lidnariq]

I was eventually getting to where Mottzilla stated.

I can think of a few possible reasons your build isn't working:

1a- The 74'161's /MasterReset line (pin 1) is always low, pinning its outputs at 0 forever
1b- The 74'161s +CountEnablePulse (pin 7) or +CountEnableCarryIn (pin 10) lines are low, disallowing alternations on the ClocK line from causing the outputs to increase
1c- The 74'161s /ParallelEnable (pin 9) input is always low, causing the outputs be always reloaded from D0..D3 instead of incrementing.
1d- The 74'161s power (pins 8 and 16) isn't connected properly
2- The 74'161's ↑ClocK line (pin 2) isn't ever alternating. A design that uses /CIC RESET OUT as a clock source will only work on frontloaders with a functioning CIC. You should probably use this design that uses a diode, resistor, and capacitor that I've seen in a lot of other multicarts.
3- The 74'161's Q0 and Q1 lines (pins 14 and 13) aren't successfully connected to the ROM's address lines (A18 and A19).

[Tormenter]

Well I found this link that is done by the same person as the link above:

http://callanbrown.com/index.php/super- ... -multicart


I wired up the multi cart with all the zeldas, just like the link above, minus the wires to the chr, since the zeldas only use prg replacement. Game boots, but does not switch games when you h it reset?

This one you linked will only work on the Front Loading "toaster" NES model. It uses a reset signal on the CIC to clock the 74*161 chip.

Okie just got around to testing this on a front loader, still does not work. Ya hit reset, and the game just resets, does not switch to the next boot.

[Tormenter]

This is how I have it wired on a AM27C040