noexani

4 ms·

1.
Why that Thunderbolt add-in card doesn't work properly in your unsupported PC(mattmillman.com)
132 points by noexani 5y ago|80 comments
2.
Why do we call these “DuPont” connectors?(mattmillman.com)
3 points by noexani 6y ago|0 comments
3.
by noexani 6y ago
It's really interesting to see that it could be done like that, but, that pseudo code you've given me would translate to a heck of a lot of MCS-48 instructions! 16-bit subtraction in particular is really expensive. Potentially n
4.
by noexani 6y ago
You are correct. the conversion to Celsius * 10 is done earlier on, because it is easy to optionally perform this conversion, and it's easy to render the various formats (positive/negative/DP,no DP) of it to the 7-segment dis
5.
by noexani 6y ago
I have done some MCS-48 reverse engineering too. It's really useful to look at the snippets in that manual as you'll find them in disassembled code, making it quite a bit easier to understand.
6.
by noexani 6y ago
I just calculated, there are 1800 possible Celsius values. in this application. That would be quite some lookup table.
7.
by noexani 6y ago
It depends on the application. In this case a lookup table would consume quite a bit more program memory (there isn't any spare), and the division routine is needed for other tasks, so it makes sense to use it for that conversion too.
8.
MCS-48: The quest for 16-bit division on the 8-bit CPU which can’t divide(tech.mattmillman.com)
39 points by noexani 6y ago|29 comments
9.
by noexani 6y ago
Ah yes. Another one of those 'why the heck is my blog running so slow today' days. It's on Hackernews (again) Are people ever going to get over this page?
10.
An Intel MCS-48 based dual temperature sensor(tech.mattmillman.com)
6 points by noexani 6y ago|3 comments
11.
by noexani 6y ago
DS18B20 one-wire bus temperature sensor with old school LED 7 segment displays