1 Feb
2002
1 Feb
'02
1:43 a.m.
Does anyone know exactly what a Smoke Signal Broadcasting DCB-4E cards are
for? It's and EXORbus card and has a MC6821P and a WD FD1791B-02 LSICs and
a lot so SS TTL ICs on it. Does anyone have data for the card?
Joe
1 Feb
1 Feb
4:23 a.m.
No docs here, but it sounds like a floppy or hard disk controller
(ST-506).
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
sure.
Andreas
Joe wrote:
Does anyone know exactly what a Smoke Signal Broadcasting DCB-4E cards are
for? It's and EXORbus card and has a MC6821P and a WD FD1791B-02 LSICs and
a lot so SS TTL ICs on it. Does anyone have data for the card?
Joe
--
Andreas Freiherr
Vishay Semiconductor GmbH, Heilbronn, Germany
http://www.vishay.com
5:44 a.m.
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...
Bill McDermith
----- Original Message -----
From: "Andreas Freiherr" <Andreas.Freiherr(a)Vishay.com>
To: <classiccmp(a)classiccmp.org>
Sent: Friday, February 01, 2002 8:23 AM
Subject: Re: Smoke Signal Broadcasting DCB-4E
_________________________________________________________
Do You Yahoo!?
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No docs here, but it sounds like a floppy or hard disk controller
(ST-506).
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
sure.
Andreas
Joe wrote:
>
> Does anyone know exactly what a Smoke Signal Broadcasting DCB-4E
cards
are
> for? It's and EXORbus card and has a MC6821P
and a WD FD1791B-02 LSICs
and
a lot so SS
TTL ICs on it. Does anyone have data for the card?
Joe
--
Andreas Freiherr
Vishay Semiconductor GmbH, Heilbronn, Germany
http://www.vishay.com 
23 Feb
23 Feb
5:58 p.m.
New subject: Smoke Signal Broadcasting BFD-68 Floppy Disk Controller
I'm trying to find information on the BFD-68 disk controller card.
I have information of the BFD-68 Rev. A card. It has three connectors
at the top of the card. See this link:
http://members.bellatlantic.net/~vze2wsvr/BFD_68A_diagram2.jpg
The one I want has only the single connector on the top left.
The schematic for the BFD-68 Rev. A is here:
http://members.bellatlantic.net/~vze2wsvr/BFD_68A_schematic2.jpg
I'm looking for the same information (board diagram and schematic)
for the non-version A card.
Thanks,
Eric
1 Feb
1 Feb
5:39 a.m.
Does anyone know exactly what a Smoke Signal
Broadcasting
DCB-4E cards are
for? It's and EXORbus card and has a MC6821P and a WD FD1791B-02 LSICs and
a lot so SS TTL ICs on it. Does anyone have data for the card?
I know that the DCB-4A is a floppy disk controller for the
SS-50 bus machines, so my first thought would be that the 4E is a
similar board for a different bus setup.
Jeff
--
Home of the TRS-80 Model 2000 FAQ File
http://www.cchaven.com
http://www.geocities.com/siliconvalley/lakes/6757
7537
days inactive
8289
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4 comments
5 participants
participants (5)
-
Andreas.Freiherr＠Vishay.com -
bill_mcdermith＠yahoo.com -
jhellige＠earthlink.net -
rigdonj＠cfl.rr.com -
vze2wsvr＠verizon.net