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Re: [N8VEM-S100:4583] 8080 CPU - UARTS Tested

Good to know, I've got a bunch of 16550's.


On Friday, July 18, 2014 8:32:29 AM UTC-5, Crustyomo wrote:
Hi Guys,

Fabio asked if the board could use other UART chips, namely the 16550 chip.

I don't see why not, they are suppose to be pin compatible and should be backward compatible register sets.
But I decided to test it out quickly for sake of knowing for sure.  On a quick test (ie can I send and receive data),
they all work.  Here's a list of chips from my junk box that I've tested:

NS: PC8250CN
WD: WD8250-PL
WD: 8250B-20
SIS: 82C50B

SIS: 82C450
NS: NS16450N
NS: PC16550DN

I suppose the hardware flow control and modem controls would all work the same, but I'm not using any of that.

Bah, flow control is for 8008 users!  Here we are using an 8080A chip. 2Mhz and 64K of memory ought to be enough for anybody.