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#spectrum

4 posts4 participants1 post today

zen80 update: improved tests

Apart from the already substantial unit tests, we now have two additional and rather stringent tests:

  1. This test loads the ZX Spectrum 128 ROMs (0 and 1) and runs that machine's initialisation process. Then it shows a statistical analysis of the instruction coverage that's been executed during rom initialisation. (total percentage of different opcodes executed for each instruction group)

  2. The second big test implements traps as barebones CP/M shims, loads ZEXDOC.COM and runs its extensive stress test (this can be long).

Work is ongoing to support ZEXALL.COM as well, an even more stringent version of zexdoc that also tests undocumented registers and quirks of the Z80, one of the hardest tests known. This will be next, after I'm certain that this passes all ZEXDOC tests without a hitch. So far so good!

Ya he recibido la nueva #MicroHobby y aunque sólo he leído por ahora la mitad puedo confirmar que esto no es un sacacuartos sin alma para señores nostálgicos de mediana edad. Es un producto hecho con un cariño infinito y un profundo respeto al original (no solo mantiene la numeración sino que incluso tienen el mismo ISBN), sorprendentemente lleno de contenido para tratarse de un nicho dentro de una afición de nicho. La única pega que le puedo poner es que las demos son solo para la versión en digital con lo cual en papel pierdes una parte de la experiencia. Encantado estoy, no solo seguiré suscrito sino que posiblemente me pase a papel más digital para tener nuevos viejos juegos para el Spectrum :flan_hearts:

Just contributed to the Issue 3 of the ZX Spectrum Next kickstarter! Looking forward for the accelerated version around December…

It is all (4 times!) fully backed now, but if you’re interested, now is the moment. And there is a translucent magenta case that might just be your thing…

Just have a look! 29 days to go…

kickstarter.com/projects/spect

#Kickstarter #ZXSpectrum
#Spectrum #SpectrumNext
#ZXSpectrumNext #ZXSpectrumNextIssue3

LIVE, Dammit Bluesky Blog

#YESquote: 9 Minds:Inner Lives on the #Spectrum/David Tammet - "Research has shown " #disabled" ppl can be lonelier than "non-disabled," #autistic ppl particularly. Autistic ppl...are "disabled" when others...do not undrstnd their diffrntly wired minds nor accommodate for their needs. bit.ly/4eYidJv
bit.ly/4eYidJv

LINK: bsky.app/profile/livedammit.bs

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This robot is not affiliated with LIVEdammit.
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What is the reversal of infodumping? @actuallyautistic
(What would you label "being subjected to or seeking further information on a topic, possibly for current or future deepdive sharing"?)
Very interested in translations or interpretations in other languages, including gestural and/or sign language, if you know any and want to share.

Aw, I just thought of Info dunking. Ah well.
Let info damping be "to rain on someone's misinformation parade." [Maybe dampening? Idk. Linguists take the wheel.]

Will I find weird star colors in non-typical stars?

1st photo - Zeta Herculis and Beta Draconis - high metallicity stars. North is to the left and captures the keystone asterism in Hercules in the upper right of the frame and the head of Draco in the lower left. High metallicity stars have more absorption features in their spectra compared to low metallicity stars.

To my eye, they don't exhibit weird color that is different than all the other stars in the frame.

en.wikipedia.org/wiki/Metallic

2nd photo - finder chart with these two stars circled in red.

3rd photo - Omicron Draconis is a star with emission lines in its spectrum. It's an RS Canum Venaticorum type of star and that is one of their defining characteristics. Again, it's color does not stand out as weird.

en.wikipedia.org/wiki/Emission

4th photo - finder chart.

I plan to image other emission line stars after monsoon ends.

A star with a weird color - Nova Lupi 2025 (V462 Lupi)

1st photo is not annotated. Can you find the nova?

2nd photo is annotated.

3rd photo was deliberately mis-focused so that stars were larger disks instead of small points. This makes it easier to see the color.

Note that there are plenty of orange stars and plenty of blue stars...but the nova has a unique color. To my eye it's a pale purple.

Why does the nova have a weird color?

4th image was taken from facebook.com/photo/?fbid=17712 it's a spectrum of the nova. Most stars have a blackbody radiation distribution, but novae (that's the Latin form, plural) have strong emission lines at discrete colors. That can make a weird color compared to most stars.

Image taken with a camera on a fixed tripod.

en.wikipedia.org/wiki/V462_Lup