On Sat, Jun 2, 2018 at 11:16 AM, Stephen Adolph <[email protected]> wrote:
> It looks like the T200 puts the 82c51 into async x16 at address 8713h in > the rom. (out C8 where a =4Eh > > clock has to be 5x faster in this mode, so for 76800 we'd need a clock > rate of 76800x16x5 = 6.144MHz. clearly.. not going to work. > > However if we put the 82c51 into x1 mode it could work. > > I think the sequence is something like > > mvi a,40h > out C8h -- reset the chip > mvi a,4D - 1 stop bit, no parity, 8 bits, 1x mode > > one would still have to set the clock divider registers separately. > > > Ok, that sounds promising at least. I don't know what the async x1 and x16 modes are... I guess it didn't come up in setting bps on the Model 10x. -- John.
