On 6/14/2017 11:42 AM, Brent Hilpert via cctalk wrote:
No, the prints (1105_RevAH_EngrDrws_Jul76, page 71) shows there's only one RC circuit associated with the UART. I don't know what the second trim-pot does (I'm too lazy to look over the prints to find it:-).Oh, regarding the two trimpots (as well as the 7493 divider) I was referring to the original-poster TRS-80 serial board, not the PDP11/05.
FWIW the send and receive clocks are separate on the 1602 Uart.
