I tried to use it without a audio cable and it worked (I had to stay quiet though)
Phono Transceiver for SmileBasic, and compress/decompress utility
PetitModem
- speed
- 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※)
- 2400bps •1800 pi/4 DQPSK (ITU-T V.26bis corresponding※)
- Duplex: Half / Simplex
- Synchronous method: start-stop(StartBit:1,StopBit:1)
- Binary transfer protocol: original(YMODEM-like)
- simplex mode
- with ARQ(Automatic Repeat reQuest) mode
- Error detection: CRC16(Koopman)
- Charactor set: UCS-4/UTF-8 convert on SmileBasic
LZSSLib
- Algorithm: LZSS
- File Format
- TXT PRG ⇔ PZT
- BMP PNG JPG ⇔ PZG
- DAT ⇔ PDA