Richardcavell
Member
I am trying to understand how to transfer data over a serial port. Please take a look at the serial port on the TRS-80 Colour Computer 2: **broken link removed** The one labelled "Coco I/O Serial for printing".
I can understand the ground and data out lines but when does the receiving peripheral know when data is valid? The Commodore 64 has a clock and data line - when sending data, the clock line is pulsed every time the data line is valid, and that tells the peripheral that the bit is valid. With no sync signal, how does the printer know when to read a bit from the data line?
I can understand the ground and data out lines but when does the receiving peripheral know when data is valid? The Commodore 64 has a clock and data line - when sending data, the clock line is pulsed every time the data line is valid, and that tells the peripheral that the bit is valid. With no sync signal, how does the printer know when to read a bit from the data line?