the cutting room mirror

Port Test Cartridge

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The Port Test Cartridge was a service cart used in Nintendo factories to check NES consoles for manufacturing defects. It was also used by Nintendo World Class Service centers for a similar purpose.

Download Port Test Cartridge

File: Port Test Cartridge.rar (10 KB) (info)

Bypassing Failed Input Port Test#

As seen in this footage of Nintendo's factory, the cartridge expects the NES to be connected to a controller test jig. As no emulators currently have support for this test jig, the cartridge will fail when attempting to test the Zapper lines in the controller port.

Game Genie code TUEGIL will bypass this test and move on to the other tests in the cartridge.

Unused Graphics#

The background scrolling test uses graphics copied from the NES port of Popeye, including some sprites that don't get shown during the test.

One of the Sea Hag's sprites.

A front-facing skull, which also went unused in Popeye.