interesting links2023-03-13T11:17:33+01:00https://roland.iwasno.net/links/https://roland.iwasno.net/links/https://roland.iwasno.net/links/The 6502 overflow flag explained mathematicallyhttps://roland.iwasno.net/links/?VwNfBg2023-03-13T11:17:33+01:00Just one of the many interesting articles written by Ken Shiriff, who also has chip photos together with detailed information about the corresponding circuit, e.g.<br />
<a href="https://www.righto.com/2022/04/reverse-engineering-lm185-voltage.html" rel="nofollow">https://www.righto.com/2022/04/reverse-engineering-lm185-voltage.html</a><br>(<a href="https://roland.iwasno.net/links/?VwNfBg">Permalink</a>)Cowgol 2.0: Ada-inspired language for very small systemshttps://roland.iwasno.net/links/?mfqhrA2021-02-23T14:45:29+01:00Main page is <a href="http://cowlark.com/cowgol/" rel="nofollow">http://cowlark.com/cowgol/</a><br />
It used to support the Apollo Guidance Computer used in the Apollo spacecraft, but I had to remove the code generator while rewriting the compiler and I haven’t reworked the AGC backend.<br />
<a href="http://cowlark.com/2019-07-20-cowgol-agc/index.html" rel="nofollow">http://cowlark.com/2019-07-20-cowgol-agc/index.html</a><br />
The author also ported the Fuzix operating system to the Raspberry π pico.<br />
<a href="http://cowlark.com/2021-02-16-fuzix-pi-pico/index.html" rel="nofollow">http://cowlark.com/2021-02-16-fuzix-pi-pico/index.html</a><br />
<br />
His tool <a href="https://github.com/davidgiven/narcissus" rel="nofollow">https://github.com/davidgiven/narcissus</a> to remap keys might be interesting too.<br />
So is his Forth system <a href="http://cowlark.com/fforth/" rel="nofollow">http://cowlark.com/fforth/</a><br>(<a href="https://roland.iwasno.net/links/?mfqhrA">Permalink</a>)ArDSKYlite | Hackaday.iohttps://roland.iwasno.net/links/?NvR4kw2019-12-19T16:25:35+01:00A very lightweight representation of the venerable Apollo DSKY. Uses a Touch LCD to bypass all the hardware complexity.<br>(<a href="https://roland.iwasno.net/links/?NvR4kw">Permalink</a>)Reading List: Sunburst and Luminaryhttps://roland.iwasno.net/links/?dCF7Nw2019-12-18T17:15:24+01:00Review of<br />
Eyles, Don. Sunburst and Luminary. Boston: Fort Point Press, 2018. ISBN 978-0-9863859-3-3.<br />
<a href="http://www.sunburstandluminary.com/SLhome.html" rel="nofollow">http://www.sunburstandluminary.com/SLhome.html</a><br />
<br />
The next blog entry is interesting as well.<br />
<a href="https://www.fourmilab.ch/fourmilog/archives/2019-11/001848.html" rel="nofollow">https://www.fourmilab.ch/fourmilog/archives/2019-11/001848.html</a><br />
Crossfield, Albert Scott and Clay Blair. Always Another Dawn. Seattle, CreateSpace, [1960] 2018. ISBN 978-1-7219-0050-3.<br>(<a href="https://roland.iwasno.net/links/?dCF7Nw">Permalink</a>)Jim's Notes: Apollo Virtual AGC for Raspbian on Raspberry Pi 4https://roland.iwasno.net/links/?R2P4OQ2019-12-12T13:37:41+01:00Brief description of a failed attempt to install the virtual AGC <br />
from <a href="https://www.ibiblio.org/apollo/" rel="nofollow">https://www.ibiblio.org/apollo/</a> on a Raspberry π 4 running Raspian.<br>(<a href="https://roland.iwasno.net/links/?R2P4OQ">Permalink</a>)St Kwan's Home for the Terminally ADD: Radiation-pressure propulsion for nano-spacecrafthttps://roland.iwasno.net/links/?m9bMUw2019-07-02T19:45:49+02:00Abstract: The Breakthrough Starshot project proposes using radiation-pressure propulsion to send multiple spacecraft in the gram-range mass to interstellar targets. There are numerous engineering challenges to accomplishing this mission, but their project discusses speeds and accelerations previously only discussed for cannon projectiles and particle physics experiments. This article examines the problem from first principles to see if the project is even orders-of-magnitude possible. A preliminary check on their numbers seems to confirm that the project is possible in principle.<br />
<a href="https://stkwans.blogspot.com/2012/04/program-66.html" rel="nofollow">https://stkwans.blogspot.com/2012/04/program-66.html</a> is about the Apollo guidance computer.<br />
<a href="https://stkwans.blogspot.com/2012/09/a-review-of-adxl345-and-bma180.html" rel="nofollow">https://stkwans.blogspot.com/2012/09/a-review-of-adxl345-and-bma180.html</a><br>(<a href="https://roland.iwasno.net/links/?m9bMUw">Permalink</a>)Virtual AGC (Apollo guidance computer) Home Pagehttps://roland.iwasno.net/links/?gFFI3g2018-01-24T14:40:19+01:00The purpose of this project is to provide a computer simulation of the onboard guidance computers used in the Apollo Program's lunar missions, and to generally allow you to learn about these guidance computers.<br />
See also the source code at <a href="https://github.com/chrislgarry/Apollo-11/" rel="nofollow">https://github.com/chrislgarry/Apollo-11/</a><br>(<a href="https://roland.iwasno.net/links/?gFFI3g">Permalink</a>)FlightLMhttps://roland.iwasno.net/links/?6dqY9Q2018-01-24T14:39:16+01:00An AGC (Apollo guidance computer) emulator written in C++. The package contains only the emulator.<br>(<a href="https://roland.iwasno.net/links/?6dqY9Q">Permalink</a>)