Wanting to put an old Nintendo Entertainment System (NES) controller to “good” use, I dialed up some instructions for converting a standard NES controller with a serial cable to an NES controller with a USB cable. The instructions recommended first extracting a keyboard controller from a working keyboard, and then wiring the NES controller buttons to the keyboard controller inputs. After removing a controller from an unused keyboard, I examined the circuitry for identifiable markings on the PCB.
Finding three useful looking strings (ROHS, T2414A and JH108PCB), I searched online for information about the output of combinations of the terminals labeled R and C. Unable to locate anything, I decided to map the inputs and outputs myself. I was able to quickly record the output of the various combinations by placing one end of a jumper wire in an R terminal and tapping the C solder points one at a time. I ended up using a simple text editor for this task after difficulties using a spreadsheet program and wordprocessing program. In both of the latter programs auto-formatting features made the task of recording the outputs unnecessarily cumbersome. The table below shows what I found using a Macbook.
Input Output R0+C1 q R0+C2 w R0+C3 e R0+C4 r R0+C5 u R0+C6 i R0+C7 o R0+C8 p R0+C10 R0+C11 Shutdown R0+C9 F1 R0+C14 + R0+C15 9 R0+C12 8 R0+C11 7 R0+C17 R0+C16 R0+C0 F2 R1+C1 Tab R1+C2 Caps Lock R1+C3 F3 R1+C4 t R1+C5 y R1+C6 ] R1+C7 F7 R1+C8 [ R1+C10 Delete R1+C11 Shift R1+C9 0 R1+C14 R1+C15 6 R1+C12 5 R1+C11 4 R1+C17 R1+C16 Command R1+C0 Shutdown R2+C1 a R2+C2 s R2+C3 d R2+C4 f R2+C5 j R2+C6 k R2+C7 l R2+C8 ; R2+C10 \ R2+C11 Shift R2+C9 R2+C14 Down Arrow R2+C15 3 R2+C12 2 R2+C11 1 R2+C17 Command R2+C16 R2+C0 0128 R3+C1 Escape R3+C2 Help R3+C3 F4 R3+C4 g R3+C5 h R3+C6 F6 R3+C7 a R3+C8 ' R3+C10 R3+C11 F11 R3+C9 R3+C14 Up Arrow R3+C15 . R3+C12 0 R3+C11 Space R3+C17 R3+C16 R3+C0 Shutdown R4+C1 z R4+C2 x R4+C3 c R4+C4 v R4+C5 m R4+C6 , R4+C7 . R4+C8 \ R4+C10 Return R4+C11 F12 R4+C9 a R4+C14 F8 R4+C15 * R4+C12 / R4+C11 R4+C17 R4+C16 R4+C0 Control R5+C1 a R5+C2 a R5+C3 a R5+C4 b R5+C5 n R5+C6 R5+C7 R5+C8 / R5+C10 R5+C11 R5+C9 R5+C14 Left Arrow R5+C15 - R5+C12 Right Arrow R5+C11 Down Arrow R5+C17 R5+C16 R5+C0 Shutdown R6+C1 ` R6+C2 F1 R6+C3 F2 R6+C4 5 R6+C5 6 R6+C6 = R6+C7 F8 R6+C8 - R6+C10 F9 R6+C11 R6+C9 000 R6+C14 R6+C15 R6+C12 Help R6+C11 Delete Right R6+C17 R6+C16 F10 R6+C0 Control R7+C1 1 R7+C2 2 R7+C3 3 R7+C4 4 R7+C5 7 R7+C6 8 R7+C7 9 R7+C8 0 R7+C10 F10 R7+C11 R7+C9 R7+C14 R7+C15 R7+C12 Shutdown R7+C11 Shutdown R7+C17 R7+C16 R7+C0 F5 |
Not all input combinations yielded an output. Where a letter, number or symbol was the output, it was recorded in the table. For the function key mappings I used an on-screen keyboard visualizer which is available in the OS X preference pannel under settings for the keyboard. A few input combinations outputted a string of numbers (see R3+C0 and R6+C9). While none of this information is super-exciting, I hope that by recording it here I might save someone working on a similar project some time and effort. Happy tinkering!
Thank you for saving me a good few hours of work.
I didn’t expect to find this on the net!
Thank you so much man!
Dude, you just saved my ass, i had mapped 10 keys, but was way too annoying for me to go on, and here you are, saving my day!
thank you!
After mapping 4 keys for a similar project I got tired and decided to google some of the markings on the PCB and this came up. Thank you so much for the work!
Thank you for saving a lot of time 🙂
Thanks so much!!!! saved so much time. Wondering if you know what kind of connector this is? I want to use the pins and thought it would be cleaner if i plug into the connector rather than solder onto the pins
Thanks again
Hello.
Does anyone have datasheet of circuit T2414A?