SPI Interface

Sep 12, 2014 144 Replies

ITYWF that its instruction set was heavily influenced by the need to make a CPU that worked fast on the minimum of silicon.

Everything you read in newspapers is absolutely true, except for the rare story of which you happen to have first-hand knowledge. ? Erwin Knoll

..like the 6502, which also pipelined the fetch and execute phases.

Typical instruction time was about 3 cycles--very fast for the time. IIRC it was about 12,000 transistors, and used a PLA for control.

-michael - NadaNet 3.1 and AppleCrate II: http://home.comcast.net/~mjmahon

Well, that's memory for you. ;-)

The 6502 was 3,510 transistors!

-michael - NadaNet 3.1 and AppleCrate II: http://home.comcast.net/~mjmahon

12,000 transistors was half way to an ARM1.

The ARM2 also had 25,000, but it shot up to 300,000 on the ARM3 due to the 4K of cache.

---druck

Good thing they were making transistors smaller by then. I'd hate to have to wire that up on solderless breadboards... I'm just sayin'

Rick

How about relays !!!

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;-)

Too high tech. Try this!

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W J G

That's one of my favourite websites.

This gives new meaning to :

1 + 1 = 10 for large volume of 1

I also like this device:

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there are 10 types of people in the world, those who understand binary those who dont

conning the most intellegent people on the planet is not easy

Indeed :)

Perhaps we could use something to drive the blue LEDs. Hmmm, maybe a Raspberry Pi could do it :P

W J G

I'm familiar with that one, just not the other.

Why is o6 afraid of o7? Because o7 o10 o11.

Ooh, you're so ... on topic.

pi = 22/7 for large values of pi

-michael - NadaNet 3.1 and AppleCrate II: http://home.comcast.net/~mjmahon

MJM has got it.

The marble is larger then a bit. i.e. larger volume

There, fixed your post for you! :-)

J B Good

This, at least, includes the hint of the number base with a letter 'o' prefix. The 'joke' only becomes apparent when you convert to decimal notation:

"Why is 6 afraid of 7?" "Because 7 8 9."

J B Good

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