On Thu, Nov 14, 2019, 10:30 PM Jim Brain via cctalk <cctalk@classiccmp.org> wrote:
> On 11/14/2019 11:05 PM, Brent Hilpert via cctalk wrote: > > > > (Without having gone through the code presented in full detail, but > thinking from root premises.) > > > > ASCII A = 0x41 --> 2 bits on > > ASCII T = 0x54 --> 3 bits on > > I agree, though I believe aT,At,AT,and at are all allowed, which > complicates things a bit aT is the bad one, where the calc for 7E1 and > 7S1/8N1 yield the same values... > 1200 baud hayes modems required the initial AT be all upper case. I can't recall if the 2400 baud modem relaxed this, or if it was later version. Also, AT introduced commands. +++ could be followed immediately by ATH to hang up... But the parity trick discussed here matches my memory as well... Warner >
