HP 27201A, The World's First Speech Synthesizer ... by a major computer company

The HP 27201A is a TMS5220 based speech synthesizer released in 1983. According to the HP museum, it's the first synthesizer designed by a major computer computer. Yes, the TI99/4A's speech synthesizer uses the same IC and is at least contemporary if not even predating the HP module. The module has very sparse documentation on the web, so I had to disassemble the Z8 ROM and then reverse engineer the protocol. In the video I end up controlling the module from a raspberry pi over a serial connection. For more electronics videos, see http://www.smbaker.com/ Blog post: https://www.smbaker.com/hp-27201a-spe... Python tool for controlling the module: https://github.com/sbelectronics/hp27...