15 Apr
2005
15 Apr
'05
4:18 p.m.
Subject: 7201 (was Re: Z8530 (was Re: Navtel 9460
Protocol Analyzer info?))
From: "Eric Smith" <eric at brouhaha.com>
That chip sucked when used as a plain old UART. In
order to handle slight
speed mismatches between two modems emplying synchronous modulation,
;-) It was nearly a full clone of the Z80 SIO with one difference,
the interrupt logic matched the 8085/8086 rather than Z80.
As a simple SIO it was a major pita to use, too dang many registers.
As a result I ahve a bunch of them and never use them. Ise the 2681,
8251 or 8250 before that beastie.
The only thing worse to design with and use was the COM2501, dumb
as a stump.
Allison