It may be possible to get it down to 45.45 baud by replacing the xtal with a crystal at 1.6754 MHz or more likely a TTL oscillator programmed to that frequency. My math might not be 100% right but you get the idea.

 

 

73 Eugene W2HX
My Youtube Channel: https://www.youtube.com/@w2hx/videos

 

 

From: [email protected] <[email protected]> On Behalf Of Keith Lueck
Sent: Wednesday, March 27, 2024 4:56 PM
To: GREENKEYS BULLETIN BOARD <[email protected]>
Subject: [GreenKeys] 6551 UART on clearance at Jameco

 

Thought this might be of interest to the group since it goes down to 50 baud (or ext clock /16) and 5 bits...

 

Cheers,

 

Keith

 

Asynchronous Interface Adapter 6551 | Jameco Electronics

 

Asynchronous Interface Adapter 6551 | Jameco Electronics

Jameco Electronics 6551 Microprocessor, Interface Adapter. Products in stock and ready to ship. Quotes, samples ...