Path: utzoo!mnetor!uunet!husc6!cmcl2!nrl-cmf!ames!pasteur!ucbvax!CORY.BERKELEY.EDU!dillon From: dillon@CORY.BERKELEY.EDU (Matt Dillon) Newsgroups: comp.sys.amiga Subject: Re: Amiga as workstation (serial ports, really) Message-ID: <8805091751.AA08743@cory.Berkeley.EDU> Date: 9 May 88 17:51:27 GMT Sender: daemon@ucbvax.BERKELEY.EDU Lines: 18 :I suspect that the main reason that "idiot manufacturers" still run their :serial ports at 19.2Kbaud is because most commercially available (= CHEAP) :UARTs are only capable of 19.2Kbaud. For example, the 6551, which is cheap, :has low chip count (add a crystal, bus buffers, and ready to go), and is :easily interfaced with 68xx/65xx/68K-based machines. I suspect there's an :aweful lot of 6502's out there (e.g. I recently discovered that the TVI 910 :was 6502-based, when I patched a bug in their firmware for a local :university). Actually, you can run most UARTS at >19.2KBaud. I currently have a small home-built computer consisting of a 6502 running at @2Mhz+, several other IO chips but most noteably two 6551A's running at 76.8KBaud. It is just a matter of giving the thing a faster crystal. I would be surprised if you could run x1 UARTS (that require a clock in for synching but do not require a 16x clock for sampling) at 1MBit easy. Note: read, non-custom and low cost parts here. -Matt