Pinned toot
Pinned toot

Everyone is focused on the ransomware… they should really be focused on the delivery mechanisms.

今天要換手機了,原本的 Redmi Note 7 電池已經鼓包。然後新買的 Redmi Note 9 Pro 到貨了,不過問題是這隻代號 Joyeuse,然而 Orangefox Recovery 之類的只有 Miatoll ,最神奇的是 PitchBlack Recovery 的 Joyeuse 就是指向 Miatoll,難不成 Joyeuse 和 Miatoll 這兩種可以用一樣的 Recovery / ROM?

Remember, turn off ALL your electronic devices before 2038-01-19 03:14:07 UTC, unless it has a "2K38 Safe" certification.

剛剛跟某個群組裡的 Hi-Fi 玄學家吵架了……

When setting up a radio transmitter, it's important to perform impedance meowching. You can check it with an SWR meter. (source: #caturday #electronics #mastocat #catstodon #cat #cats

#bandcamp is awesome:

* music i can actually download
* in mp3, ogg or flac
* lots of cool musicians and video game composers are on it

* reduces my chances of piracy by 100%

然後在搞懂 LILO 如何裝在 loopback 上(需要手動指定 Disk Geometry,以及裝置類型)之後,用 LILO 替換了 KERNEL.SYS + loadlin.exe 這個組合,又省出 50KiB 左右的空間。

結論:果然 SYSLINUX 太大了,不過 LILO 也真的很厲害。

Show thread

最近兩天在給 AOSC/Retro 研究怎麼把現代 Linux Kernel (5.4.114 LTS) 塞進軟碟開機,原因是許多 486 等級的機器並沒有辦法直接從 CD-ROM 啟動,於是然後我做到了把 PATA (IDE) 硬碟/光碟機驅動,甚至是 Network Stack(盡量把大多數非必要 Driver 弄成 Module,放進搭配的 CD image)塞進 1108KiB 的 bzImage。還有個 150KiB 的 Initramfs,裡面是 busybox 和配套 init script,用來自動掛載 CD-ROM。

有趣的事情來了,SYSLINUX 這個 Bootloader 尺寸太大 (175KiB),讓我很難塞東西,於是我拿 FreeDOS 的 KERNEL.SYS (46KiB) 加上 loadlin.exe (原始 42KiB,用 upx 壓縮後 11KiB) 取代它,成功省下 100KiB 以上。

最終成果是可以直接從軟碟啟動,並且只須要 8MiB 記憶體就能成功啟動。

今晚在頂樓玩 FT-991A,首先測試了之前從淘寶買的便宜 CB 天線。這 CB 天線的 SWR 非常有問題,不管有沒有加上地網 (Radial) 都非常糟,看來確實是爛貨。

然後我換上了之前買的 RHM-7350 伸縮天線,在 CB 頻段發射沒什麼問題,還跟住很近的友台聊了一下。

之後我調整了 RHM-7350 線圈的位置,去接收朝鮮之聲 (Voice of Korea,北韓的),信號強度可以上 S9+40dB,於是我轉了一下台,意外發現能夠接收到沒被中國蓋臺的美國之音 (VOA, 當時在 11900kHz 上) 。


Its funny that it got labelled piracy like how pirates used to sail up to poor defenseless ships, forcefully board them and then copy the entire ship and sail away with the copy leaving the original ship to go on its way.

今天學到了如何在 FPGA (Intel Cyclone IV EP4CE15F23C8) 上面搞 PWM LED 呼吸燈

A farmer is a man outstanding in his field.

CQ CQ DX de XE2RMG 28.078 10m USB #JS8 #JS8Call QTH:DM61 35 watt Antenna:Fullsize wire delta loop
HamRadio #AmateurRadio #AztecaDxers #CRECJ #DigitalRadio

Let's make a colour together! <3


The final result is:

* R = 25%
* G = 40%
* B = 36%

As expected (and described in the thread), the gamut is pretty low (ie. not an immense possibility of colours, due to fact that masto polls options sum is 100)

0..100 to 0..255 (in gimp) give:

* R = 63.8 (64)
* G = 102
* B = 91.8 (92)

HTML: #40665C

It's a soft, dark, bluish green!

It's complimentary color is #66404A (102,64,74)

Its triadic scheme:
#5C4066 (92,64,102) and #665C40 (102,92,64)

We could call it "Fédi-vert"?

Show thread

Inspired by the unobtainium AMD Family 17h datasheet, I just wrote a new "Alice" parody (a classic 1980s Usenet meme) on NDA and datasheet unavailability.

Alice's Datasheets

> This song is called “Alice’s Datasheets” and it’s about Alice, and the datasheet, but “Alice’s Datasheets” is not the name of the datasheet, that’s just the name of the song, and that’s why I called this song “Alice’s Datasheets.”

> You see, it all started about two generations of proprietary microcontrollers ago [...]

#electronics #oshw

Show thread
Show more

The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!