Re: GSM short message from DAVE.SMS@MVHI.COM
H. Peter Anvin (hpa@transmeta.com)
2 Aug 1998 01:39:51 GMT
Followup to: <Pine.LNX.3.95.980801205825.1230A-100000@chaos.analogic.com>
By author: "Richard B. Johnson" <root@chaos.analogic.com>
In newsgroup: linux.dev.kernel
>
> On Sat, 1 Aug 1998, Mike A. Harris wrote:
> > 40 characters or so, but capital letters generate codes that have
> > more bits turned on resulting in a higher draw on the UART. Many
> ^^____________
>
> (char) 'A' == (char) 'a' & 95;
> (char) 'Z' == (char) 'z' & 95;
>
> He was trying to save bits! Upper case uses less bits, so the BPS can
> be higher if your communications channel is bit-limited like the
> Micro$oft browser.
>
Actually, on an RS-232 channel a 1 bit is idle, 0 is active, so null
(ASCII 0) is the most active of all characters.
-hpa
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