The 1791-02 is a floppy disc controller (8" & 5.25") and
the 6821 is a peripherial interface adapter (PIA) running at
1 MHz. THe PIA is basically a dual-byte parallel port.
If you're desperate for the chip info, let me know off-list...
----- Original Message -----
From: "Andreas Freiherr" <Andreas.Freiherr(a)Vishay.com>
Sent: Friday, February 01, 2002 8:23 AM
Subject: Re: Smoke Signal Broadcasting DCB-4E
No docs here, but it sounds like a floppy or hard disk controller
The MC6821P is the 1MHz (slowest) version of Motorola's PIA (parallel
interface adapter) for the 6800 family of 8-bit-processors, that's for
> Does anyone know exactly what a Smoke Signal Broadcasting DCB-4E
> for? It's and EXORbus card and has a MC6821P
and a WD FD1791B-02 LSICs
a lot so SS
TTL ICs on it. Does anyone have data for the card?
Vishay Semiconductor GmbH, Heilbronn, Germany
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