Some computers, of course, have neither monitor nor
signal generation (e.g.,
"card cage" machines like the S-100 machines, or machines with only a serial
port for a terminal). And some OTOH have built-in monitors (e.g., the
TRS-80 Model III, some HP machines, and the IBM 5100 -- all of which are
from roughly the era of the Apple ][).
There were not less than 8 video cards for S100 by 1977, several offered
what was considerd higest resolution that then current monitors could
display in color.
System that supplied RS170 video include the PT SOL and the POLY-88 which
are older than the trs80.
allsion