PetitModem

Last modified on Oct 27 2015.

File transfer program between Windows PC and SmileBaic on Nintendo 3DS.

Abstract

File Transfer Programs between Windows PC and SmileBasic using sound.

Transfer between PC/PC, SmileBasic/SmileBasic is also available.

no need for the special cables.

actual transfer speeds are below:

mod. rate	actual transfer speed[byte/sec]
mod. rate	w/o ARQ	with ARQ
300	20	18
600	50	47
1200	112	92

Screen Shot

Environment

PetitModemPC
- .Net Framework 4
- Mic input
- Sount output
PetitModem3DS
- new3DS(※)
- SmileBasic
silent environment

※not confirmed on old 3DS

Specification

PetitModemPC / PetitModem
- 300bps
  - 1080+-100Hz FSK / 1750+-100Hz FSK (ITU-T V.21 corresponding.※)
- 600bps
  - 1500+-200Hz FSK (ITU-T V.23 corresponding※)
- 1200bps
  - 1300+-400Hz FSK (ITU-T V.23 corresponding※)
- half duplex / simplex
- Synchronous method: start-stop(StartBit:1,StopBit:1)
- Binary transfer protocol: original(YMODEM-like)
  - simplex mode
  - with ARQ(Automatic Repeat reQuest) mode
  - To/From WAV file mode
- Error detection: CRC16(Koopman)
- Charactor set: UCS-4/UTF-8 convert on SmileBasic
LZSS for PetitCom / LZSSLib
- Algorithm:LZSS
- File Format
  - TXT PRG ⇔ PZT
  - BMP PNG JPG ⇔ PZG
  - DAT ⇔ PDA

※follows only on frequency, acuracy of it, modulation method.

Download

Ver. 1.2.7 NKX3KE13

the transfer is confirmed only between same version.
PC version contains the code for smilebasic.

License, Charge, Donation

License

This software is free of charge. You can use it personally or commercially. You are also allowed to distribute secondary, fix/alter, do reverse-engineering.

Donation

You can donate via BitCoin / gumroad / PayPal.

BitCoin

Address:16NMv1dX4hNpjvnqvRYgXS4neqHHpa6P3Y

gumroad

PayPal

Reference

Usage

SmileBASIC Tutorials - PetitModem part 1: Usage of this program in English by PetitProfessor3D.

Alternatives

Petitcom 3 QPSK Modulator: by OBONO. QPSK+Hamming code.
P/SEND2 / P/RECV2: by myu314.

Technical

ITU-T V.21: Recommendation of V.21 Modem.
ITU-T V.23: Recommendation of V.23 Modem.
Cyclic Redundancy Code (CRC) Polynomial Selection For Embedded Networks: Optimized CRC polynomial by Philip Koopman, Tridib Chakravarty.