| Digital pregnancy tests are almost as powerful as the original IBM PC [message #4484] |
Mon, 07 September 2020 10:00  |
vetus@vetusware.com
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Registered: September 2015
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Digital pregnancy tests are almost as powerful as the original IBM PC
Each test, which costs less than $5, includes a processor, RAM, a button cell battery, and a tiny LCD screen to display the result. The processor is an 8-bit Holtek microcontroller with 64 bytes of RAM, capable of running at either 4Mhz or 8Mhz depending on the battery configuration. That might sound very basic, but the chip is surprisingly complicated.
“You might think it’s very limited because it’s only got 64 bytes of RAM, but it’s actually using a pipelined architecture to operate at 1 instruction per cycle, giving it quite good performance for a 4Mhz CPU”...
https://www.theverge.com/tldr/2020/9/4/21422628/digital-preg nancy-test-teardown-processor-ram-ibm-pc
[Updated on: Mon, 07 September 2020 10:01] Report message to a moderator |
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