Lars The 18Th
LightNews LightNews
banner
larsthe18th.bsky.social
Lars The 18Th
@larsthe18th.bsky.social
14 followers 5 following 12 posts
#MSX enthusiast for over 35 years

Homepage:
https://cinicsystems.github.io

GitHub:
https://github.com/LarsThe18Th
Posts Replies Media Videos
larsthe18th.bsky.social
I discovered an annoying bug in my Maze of Galious Password Generator, so here is a new Version (0.26) #MSX
github.com/LarsThe18Th/...
Small-Projects/PC/Windows/Maze_of_Galious_PassGen at master · LarsThe18Th/Small-Projects
Small Assembly projects for MSX and PC. Contribute to LarsThe18Th/Small-Projects development by creating an account on GitHub.
github.com
July 22, 2025 at 11:14 AM
larsthe18th.bsky.social
Recreation of Knightmare (MSX, 1986) title screen logo, from the 1986-5 issue of LOGiN magazine. #MSX

Big thanks to: MP83
bsky.app/profile/mp83...

youtu.be/fN9FT3Lt1Z4
May 4, 2025 at 4:09 PM
larsthe18th.bsky.social
I almost found all cartrige combinations for #MSX game Pampas & Selene except one.

The Unknown ROM is not in my or TFH's collection,
it contains the following Hex values.
'1E E0 19 E5'

You can use this Python script to search through files.
github.com/Sepero/Searc...

Who can identify the ROM.
February 22, 2025 at 9:58 PM
larsthe18th.bsky.social
The first release of the #MSX game Tetris II (SE) also uses a dongle as copy protection.
I also reverse engineered this dongle.

Not really a secret, but it turns out that this dongle is easy to recreate with only a connector and a resistor.

More information on my github
github.com/LarsThe18Th/...
Tetris 2 dongel made out of a 9 pin joystick connector with a resistor on 4 and Pin 7. Image of a Tetris 2 dongel, a small circuit board with a (74HC02N) SMD chip soldered on it.
February 22, 2025 at 5:24 PM
larsthe18th.bsky.social
Dongles are also used as copy protection on an MSX.
For example, Circuit-Designer uses a dongle on the joystick port.
I also reverse engineered this and was able to recreate the dongle using resistors and transistors to make the logic gates.

More information on my github
github.com/LarsThe18Th/...
A circuit design of the dongle with resistors and transistors to make a NOT and an AND gate.
February 22, 2025 at 12:48 PM
larsthe18th.bsky.social
Speaking of copy protections on the #MSX, I reverse engineered a number of different copy protections to find out how they work and how to disable them.
(Mostly for preservation purposes)

Some of them are explained in detail on my github:
github.com/LarsThe18Th/...
February 21, 2025 at 12:50 PM
larsthe18th.bsky.social
If you want to run a copy protected diskimage (DMK) on your MSX with a Gotek drive. (With FlashFloppy firmware)

The best way to do this is to convert the .DMK image to .HFE (v3) format with the HxCFloppyEmulator_Software Export function.
Works like a charm.

#MSX

hxc2001.com/download/flo...
February 21, 2025 at 3:27 AM
larsthe18th.bsky.social
Equipped my Philips 8250 MSX with a Gotek drive including a switch on the back to swap between drive A and B, so I can boot from both drives.
A Philips NMS 8250 MSX Computer with the top cover removed. You see the MSX from the front, with a Gotek and a floppy drive installed. A Philips NMS 8250 MSX Computer with the top cover removed. You see the MSX from the back where a switch is installed to be able to boot from the Gotek or the Floppy Drive. A Philips NMS 8250 MSX Computer with the top cover removed. Inside you see a power cable and a flat cable connected to both the Gotek and the Floppy Drive.
February 21, 2025 at 3:12 AM