u/Old-Recognition6356 — reddlx

TI-84 Plus - Machine Language on a Calculator

A TI-84 Plus calculator was for sale at a local flea market for 25 euros (about 29 USD). I don't really need a calculator like this for anything these days, but as it appeared to be in good condition, I bought it just for the fun of it. At home, I replaced the backup battery, put in new AAA batteries, and gave it a bit of a clean-up. And finally, I also updated the firmware.

I wasn't particularly familiar with the TI-84, so I've spent the last few days getting to know it. What surprised me the most was finding out that it has a Z80 processor. Back in the day, I learned assembly programming on an MSX home computer. And those machines had a Z80 processor.

So, it was fun to write a small Z80 assembly program, transfer it to the TI-84 Plus, and see it work. Truly nostalgic.

u/Old-Recognition6356 — 3 days ago

▲ 10 r/calculators

HP Prime G2 Buttons

Just got my HP Prime Graphing Calculator G2. Is it typical that the painting on the keys is not perfect? Package was unopened and the device is otherwise as new as a new should be.

u/Old-Recognition6356 — 7 days ago

▲ 2 r/Fedora

Keyboard on Qemu Stopped Working

Keyboard on my Qemu stopped working. I'm running different Linux distros and Windows as clients. I can't log in any of them as keys don't work. When entering password no key-input is detected. Oddly I can use cursor keys on Grub screen but I can not enter e or c commands!

I'm running currently qemu-10.2.2-1.fc44.

My Qemu start command is

qemu-system-x86_64 -enable-kvm -cpu host -smp 8 \
-device intel-hda -device hda-duplex \
-net nic,model=virtio \
-usbdevice tablet \
-vga virtio -display sdl,gl=on,window-close=off \
-boot menu=on -drive file=disk.img -m 8G

Am I missing something that now is required to activate keyboard properly?

reddit.com

u/Old-Recognition6356 — 2 months ago

▲ 2 r/MacOS

Cannot Remote Connect My Mac Mini after reboot (VNC)

I have a Mac Mini on my local network. Sometimes I want to use a VNC remote connection from another computer. Not usable for all work but occasionally easier than going to that Mac. Well, my problem here is that if I need to reboot the Mac, I can’t get my remote desktop to connect. I mean I need to go to the computer and log in there. Only after that can I use the remote desktop.

Is there a way to avoid physical login?

reddit.com

u/Old-Recognition6356 — 2 months ago

▲ 0 r/Fedora

Black Screen When Second Monitor Connected (iMac 2017 27")

I have used Fedora KDE Plasma on my laptop with a second monitor with no problems for several months. I also have an old iMac 2017 model and I have installed Fedora KDE Plasma on that also (alongside Ubuntu and last supported MacOS version). Now I recently got a cheap but usable second monitor. It connects to iMac with USB connection. With Fedora the boot process hangs right before when I should enter my password (login screen does not appear, but otherwise the boot seems normal).

Google finds several reports of hangs when second monitor is connected. And statements that it is fixed. With somebody again saying it does not work.

The fix I have used is

 sudo grubby --update-kernel=ALL --remove-args=rhgb

and after that I can boot with a second monitor connected. The boot process is text only and ugly, but at least it works.

I mentioned Ubuntu and MacOS as there has been now problems with them.

---

Solution was from here: https://discussion.fedoraproject.org/t/fedora-43-kde-sometimes-boots-to-a-black-screen/171080?ct=1781009262763

u/Old-Recognition6356 — 2 months ago