I'm a little slow today. There was an article about a month ago on the Sac State 8008 and it had a link to the user manual which contained a high level schemat

I'm a little slow today. There was an article about a month ago on the Sac State 8008 and it had a link to the user manual which contained a high level schematic of that computer. Sync goes straight into a TTL inverter. So ya, TTL, of 1972 vintage anyway, didn't seem to mind -9V as an input. https://news.ycombinator.com/item?id=24515156 https://news.ycombinator.com/item?id=24515156 Figure 10 shows how the interfacing of that machine worked. http://www.digibarn.com/stories/bill-pentz-story/docs/8008UM.pdf http://www.digibarn.com/stories/bill-pentz-story/docs/8008UM...