6 Aug
2012
6 Aug
'12
10:40 p.m.
??? Take for instance older Motorola Spectra and Radius models. These things seem to
employ some sort of microprocessor. Questions is which kinds?
6 Aug
6 Aug
10:48 p.m.
On 08/07/2012 01:40 AM, Chris Tofu wrote:
Take for instance older Motorola Spectra and
Radius models. These things seem to employ some sort of microprocessor. Questions is which
kinds?
I have no idea, but I'd guess 68HC11 or derivatives.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
11:07 p.m.
Dave McGuire wrote:
I have no idea, but I'd guess 68HC11 or
derivatives. -Dave
Or 68HC05. Other vendors would have had a wider variety of choices, but
before Motorola spun of Freescale, they would have likely had a
preference for using their own components.
Typically such products would have used masked-ROM parts, rather than
flash, EEPROM, EPROM, or OTP.
11:34 p.m.
Actually, Both of you are correct. The Spectra uses a 68HC11
in the radio, and an 68HC705 in the control head. The 6811
is used with an external EEPROM for the frequency data, and
an OTP EPROM for the program.
The Maxtrax radios also use the 68HC11, but the actual model
varies; some of the low-end radios have a single, masked-ROM
part that does everything; the more high-end units use a
68HC11 with some kind of NV-Ram or EEPROM, an EPROM for the
operating program, and another custom chip that supplies more
I/O, and memory management.
Later radios like the MCS series still use the 68HC11, but
also use FLASH memory to make them easily upgradable. The
very newest radios I'm pretty sure use 16-bit freescale parts;
but I haven't looked at the specifics. . . .
OB Classic Computing Bit: You need an old-school DOS computer
to safely program the Spectra Radio.
-----Original Message-----
From: eric at brouhaha.com
Sent: Tue, 07 Aug 2012 00:07:40 -0600
To:
Subject: Re: regarding mobile radio uP, firmware, etc.
Dave McGuire wrote:
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I have no idea, but I'd guess 68HC11 or
derivatives. -Dave
Or 68HC05. Other vendors would have had a wider variety of choices, but
before Motorola spun of Freescale, they would have likely had a
preference for using their own components.
Typically such products would have used masked-ROM parts, rather than
flash, EEPROM, EPROM, or OTP. 
7 Aug
7 Aug
8:57 a.m.
On Tue, 7 Aug 2012, Eric Smith wrote:
Dave McGuire wrote:
I'm not so sure about masked-ROM parts. My Motorola Altair wireless
network devices have numerous flash EEPROM chips (soldered PLCCs) on their
stacked pc boards.
I have no idea, but I'd guess 68HC11 or
derivatives. -Dave
Or 68HC05. Other vendors would have had a wider variety of choices, but
before Motorola spun of Freescale, they would have likely had a preference
for using their own components.
Typically such products would have used masked-ROM parts, rather than flash,
EEPROM, EPROM, or OTP.
6 Aug
6 Aug
11:22 p.m.
________________________________
From: Dave McGuire <mcguire at neurotica.com>
? I have no idea, but I'd guess 68HC11 or derivatives.
C: Good guess. Forums devoted to Moto VHF/UHF hacking:
http://batboard.batlabs.com/index.php?sid=91d63af940a9b1983472f38f5e41b46e
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