Re: Proposed Assembler Commands

On Sat, 30 Apr 2005 22:40:35 -0400, the renowned keith
<krw@xxxxxxxxxx> wrote:

>On Sat, 30 Apr 2005 18:11:23 -0700, John Larkin wrote:
>
>> On Sat, 30 Apr 2005 22:45:45 +0100, Pooh Bear
>> <rabbitsfriendsandrelations@xxxxxxxxxxx> wrote:
>>
>>>Mike Monett wrote:
>>>
>>>> To All,
>>>>
>>>> Microprocessors have become so simple that it seems anyone can program
>>>> them nowadays. But think of what it was like when the first processors
>>>> came out and you had to program around noisy circuits and unreliable
>>>> memory.
>>>
>>>Rumour has it that the 6800 had an undocumented instruction.
>>>
>>>HCF - Halt and Catch Fire
>>>
>>
>>
>> It probably didn't work. The 6800 was an n-channel depletion-load
>> chip. You need CMOS to start a decent blaze.
>
>Hmm, I thought Moto and Intel were all p-channel at that time.

>From a Motorola package with a date code 1975 ceramic M6800
shrink-wrapped to it:

"Both the MPU and the other Motorola system parts are TTL compatible,
MOS N-channel, silicon gate devices."

Dynamic, too. 8-(

IIRC, the TI TMS1000 from a few years earlier was p-channel metal
gate.


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@xxxxxxxxxxxx Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
.

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