Released? Vaporware?
1200 bps, joystick port 2 ==> 300 AT, by Supra (same as MPP-1000E) 300 baud, joystick port 2, Smart Term software ==> 1200 AT, by Supra 1200 baud, Hayes compatible, connects to SIO via SupraVerter/R-Verter cable, Smart Terminal software ==> Volksmodem, by Anchor Automation 300 baud, ‘F’ Cable permits connection to joystick port 2 ==> Q-MODEM, by Quantum Microsystems 300 baud, two SIO connectors, QuanTerm disk or cartridge Beyond the above modem models, most any “industry-standard” external serial modem can work well with the Atari. These have been commonly sold for PCs for many years. The Hayes Smartmodem more or less defined the market for these, initially. One common way to use an industry standard external serial modem with the Atari is to connect it to the SIO port via an Advanced Interface Devices (A.I.D., later Supra) R-Verter Serial Bus Modem Adapter cable, or equivalent.