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August 13, 2016 / consort3

TTL & Microprocessors

TTL (that is transistor – transistor logic) is 50 years old

http://www.embedded.com/electronics-blogs/break-points/4431173/TTL-turns-50–more-or-less–in-2014-

Good article on the history of TTL

http://www.computerhistory.org/atchm/the-rise-of-ttl-how-fairchild-won-a-battle-but-lost-the-war/

A 4bit microprocessor built in TTL

http://www.bigmessowires.com/nibbler/

An even simpler TTL processor

http://www.bradrodriguez.com/papers/piscedu2.htm

A more complex TTL microprocessor

http://www.mycpu.eu/

See inside the 74181 ALU

http://www.righto.com/2017/01/die-photos-and-reverse-engineering.html

A TTL processor that does not use the 74181 ALU also interesting web-ring

http://www.galacticelectronics.com/Simple4BitCPU.HTML

Not a lot of people remember the Signetics 8200 series and the AMD 9300 series TTL

While I am on a historical bent, this site is good on old microprocessors etc.

http://www.cpushack.com/

The z80 versus the 6502

http://www.luke.maurits.id.au/blog/post/on-choosing-the-z80-over-the-6502.html

Simple z80, 6502 and 6909 computer designs

http://searle.hostei.com/grant/index.html

The development of the 6502

http://www.commodore.ca/commodore-history/the-rise-of-mos-technology-the-6502/

and this on the 70s and 80s personal computer boom

http://www.filfre.net/about-me/sitemap/

Historical computer designs index

https://people.cs.clemson.edu/~mark/hist.html

The modern way of designing a microprocessor using VHDL

http://labs.domipheus.com/blog/designing-a-cpu-in-vhdl-part-1-rationale-tools-method/

These days you normally turn a 7400 TTL design into a FPGA. Here a designer has emulated a FPGA with 7400 TTL

http://blog.notdot.net/2012/10/Build-your-own-FPGA

People still use DOS

https://opensource.com/life/16/9/interview-jim-hall-freedos

The 16 bit (2 byte) microprocessor came out in the mid seventies

222222

I have not been paying attention to what can be squeezed into the humble 8 pin DIL package. How about the NXP LPC810M, a 32 bit ARM microcontroller or the Microchip 128K X 8 serial SRAM? Are they the most complex chips put in the package?

Cloning electronics hardware

http://spectrum.ieee.org/computing/hardware/invasion-of-the-hardware-snatchers-cloned-electronics-pollute-the-market

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