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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 NS: INS8250AN 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. Cheers, Josh |