Hello Lewin,

On May 30 23:58 in a msg to Poe Lim, Lewin Edwards of 3:634/396 wrote:

LE>> 16650 = 64-byte (32 bytes + framing) FIFOs. Available from
LE>> Startech. Local distributors are "Logic For Australasia".
PL> There was some talk of compatibility problems with the early ones,
PL> but how are they now? 
 LE> That was the 16550s. The early Startech 16550 had some weird
 LE> FIFOing bug which made it incompatible with the NS16550AFN, then

The '650 was also reported to have problems in the early days. There were
quite a few complains from the US as far as NS '550 compatibility was
concerned.

PL> Are the 64byte FIFO transparently available to those merely 
PL> expecting a '550?

 LE> Nope, unless the driver/program allows you to specify Rx/Tx FIFO
 LE> trigger levels and has no range checking on the numbers you give
 LE> it.

Then it is of very limited use...

Cheers,
Poe

--- timEd/2 1.10+