Since electrical signals cannot be sent over a voice telephone line, the Telephone Interface converts those signals to audio tones so that the connection can be made over long distances via telephone.) The TRS-80 Telephone Interface I operates in the “originate only” mode, meaning that it ca...
The VIS platform consisted of a CD-ROM drive, 1Meg of ROM, 1Meg of RAM in a PC-model, meaning you got 640K plus 64K High Memory Area usable RAM. A SVGA video system output video in NTSC (switchable to PAL-I) on RF, RCA and S-video outputs. The same RAMDAC present in the ori...