> On Jan 31, 2025, at 1:55 PM, Steve Lewis via cctalk <cctalk@classiccmp.org> > wrote: > > re: on UARTS.. > > Didn't it basically standardize the process of that task of converting a > byte to bits and vice versa, in a fashion specified by RS232? No, RS232 is a way to send binary information between devices, using specified voltage levels and interface conventions. It has nothing to with UARTs. > And do so at the above-300-baud rates, since that task was too stressful > for 1MHz processors to pull off on its own (in addition to whatever else it > was doing, like flashing a cursor on a CRT?)? > And the buffer just gave grace time for if one of the systems got overly > busy? (like when scrolling said CRT)? You can do a UART in software at pretty high speeds if the processor doesn't have too much else to do. Conversely, a 110 baud UART is very painful in software on a 4004. > Might a UART be an early example of an ASIC? Yes, I would say so. paul
- [cctalk] Re: RS232 then and now David Wade via cctalk
- [cctalk] Re: RS232 then and now Frank Leonhardt via cctalk
- [cctalk] Re: RS232 then and now ben via cctalk
- [cctalk] Re: RS232 then and now Peter Corlett via cctalk
- [cctalk] Re: RS232 then and ... Chuck Guzis via cctalk
- [cctalk] Re: RS232 then and ... Fred Cisin via cctalk
- [cctalk] Re: RS232 then and ... Tony Duell via cctalk
- [cctalk] Re: RS232 then and now Frank Leonhardt via cctalk
- [cctalk] Re: RS232 then and ... Steve Lewis via cctalk
- [cctalk] Re: RS232 then and ... Steve Lewis via cctalk
- [cctalk] Re: RS232 then and ... Paul Koning via cctalk
- [cctalk] Re: RS232 then and ... Wayne S via cctalk
- [cctalk] Re: RS232 then and ... Paul Koning via cctalk
- [cctalk] Re: RS232 then and ... Steve Lewis via cctalk
- [cctalk] Re: RS232 then and ... Jonathan Stone via cctalk
- [cctalk] Re: RS232 then and ... Paul Koning via cctalk
- [cctalk] Re: RS232 then and ... Steve Lewis via cctalk
- [cctalk] Re: RS232 then and ... Cameron Kaiser via cctalk
- [cctalk] Bit-banging nightma... Christian Kennedy via cctalk
- [cctalk] Re: Bit-banging nig... Chuck Guzis via cctalk
- [cctalk] Re: RS232 then and ... Will Cooke via cctalk