On Thu, Aug 14, 2014 at 4:58 PM, Eric Smith <spacewar at gmail.com> wrote:
On Thu, Aug 14, 2014 at 2:16 PM, Chris Osborn
<fozztexx at fozztexx.com> wrote:
...Hope it's not the TR1602 chip that's
bad, looking at eBay they are very expensive.
There are a huge number of pin-compatible UART chips from various
vendors. Just a few are:
AMI S1757, S1883
Fujitsu MB8868A
GI AY-5-1013, AY-5-1013A, AY-3-1014, AY-3-1015
Harris, Intersil HD-6402, RCA CDP6402 (CMOS)
Signetics 2536
SMC COM2017, COM2502, COM2505
TI TMS6011
Western Digital TR1402, TR1602
Good list.
The main differences between the various UARTs are the
maximum speed,
whether they support a 1.5 stop bit setting, and whether they need a
negative power supply. The TRS-80 RS-232-C interface should work with
any of them.
From that list, I've worked with the
HD-6402/CDP6402 the most, but I
think I've seen the General Instruments and SMC
chips on a couple
things.
-ethan