Martin Piper (he/him) 💙💛🌻💉

Programmer and eater of pizzas.

Tech projects: https://martin-piper.itch.io/
Open source: https://github.com/martinpiper
YouTube: https://www.youtube.com/c/MartinPiper6502
Chef de cuisine: Chez 6502

Public Key

npub1cyjdsgynpx2u2qane2pw3k75z6san8v60hcvh3dfswnkzh4cm5aq8vx3hw

NIP-05 Address

martin_piper_at_mastodon.social@momostr.pink

Profile Code

nprofile1qqsvzfxcyzfsn9w9qweu4qhgm02pdgwenkd8muxtck5c8fmpt6ud6wspz3mhxue69uhhyetvv9ujuerpd46hxtnfduqs6amnwvaz7tmwdaejumr0dsslrrcx

Publishing to

atlas.nostr.land

relay.damus.io

nos.lol

Author Public Key

npub1cyjdsgynpx2u2qane2pw3k75z6san8v60hcvh3dfswnkzh4cm5aq8vx3hw

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Last Notes

2026-03-16 13:42:07 UTC

Yes it's an 8 megabyte flash #Commodore64 cartridge.
https://files.mastodon.social/media_attachments/files/116/239/140/193/799/239/original/6cd0fd09ff482500.jpg

2026-02-28 15:24:55 UTC

I look at a few #Commodore64 games and show how they unlocked super secret hidden colours... Not really, it's quickly alternating complementary colours with CRT display effects.
https://youtu.be/eUD5XPWPer4

2026-01-09 03:56:11 UTC

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No, it's a bit more limited because the cartridge and REU data is in slower RAM compared to the main RAM.

2026-01-09 03:51:49 UTC

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indeed it does :)

2026-01-09 03:50:31 UTC

I added extra parallax and squishy effects to the new Mega Multicolour Mode for the #C64Ultimate. This is to show there is ample time for lots of extra stuff with this screen mode.
https://youtu.be/dQv_epsBdgk

2025-11-28 20:12:28 UTC

https://youtube.com/shorts/q-He2bVpHXI?si=P0BLV07P6WH7Uquy
https://files.mastodon.social/media_attachments/files/115/629/145/317/232/240/original/8b98e3adc524c4d5.mp4

2025-11-14 16:39:02 UTC

This video shows the new Character layers working with #MegaWang2000TurboEdition and #Commodore64. Three layer parallax with optional dithering. Using easier to find surface mount components instead of the old through hole design.
https://youtu.be/yieNq5IupHI

2025-10-18 02:22:27 UTC

Wow it's ten o'clock in the morning and someone in this cafe is already drinking beer.

2025-10-15 11:55:17 UTC

I look at #Commodore64 "Super Mario Bros 64" by ZeroPaige in 2019. How the screen scroll uses VSP, the Mario sprite split render, some dynamic sprites, and find some original (mostly) NES code.
https://youtu.be/JgwT0Da8R3M

2025-05-15 23:21:30 UTC

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I only have a couple of the UV window versions left blank now. They seem to be impossible to find new these days in any kind of reliable quantity. At least the electrically writable pin compatible packages are common.

2025-05-14 16:01:00 UTC

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me neither. It's like they only existed before the Internet and nobody scanned the documentation.

2025-05-14 15:56:02 UTC

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used in this cartridge
https://retrogametycoon.com/en/catalogue/micro-machines-turbo-tournament-96-prototype-version_1569590/

2025-05-14 12:10:07 UTC

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found usage in emulators? https://github.com/ekeeke/Genesis-Plus-GX/blob/master/core/cart_hw/md_cart.c#L2037

2025-05-14 11:16:52 UTC

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isn't it a PAL?

2025-04-26 15:36:43 UTC

Need a real #Commodore64 hardware check. Run the prg from link and move Tusari to the top of the screen and leave it for about 15 minutes. On my old machine the crystal sprites will display corrupted data down the left edge. If you see the same please let me know.
https://github.com/martinpiper/C64Public/blob/master/Tusari2/FLDParalax/FLDParalax.prg
https://files.mastodon.social/media_attachments/files/114/405/001/743/126/825/original/a6f59b003d1eefc1.mp4

2025-04-03 22:07:33 UTC

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what happens to the clock pulses during the transition? You'll get a momentary logic contention on the clock. Does the device tolerate very short transient clock pulses?

2025-02-18 00:42:34 UTC

This new mostly SMT board with larger super scaled sprites is slightly smaller than the through hole scaled sprites board. This new board allows 1MB of sprite data (compared to 64KB) and any size scaled sprites up to 255x255 pixel sprites. It also renders about 30 times faster.
https://files.mastodon.social/media_attachments/files/114/022/108/995/323/714/original/f91338f00cbdb879.png

2025-01-17 15:19:04 UTC

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I really liked developing on SGI IRIX machines.

2025-01-02 07:58:27 UTC

#Amiga geeks. I'm trying to find an old workbench application from before 1994 that would play an endless algorithmic based tune. In was called something like rhythm box or blues box. Do you know what this could be?

2025-01-01 23:43:41 UTC

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yeah some CPUs do this. The SuperFX springs to mind.

2024-12-30 01:19:54 UTC

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"why don't you support my preferred OS or compiler or makefile variant? I want you to do all the work. "

2024-12-21 14:37:36 UTC

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the cells need to be written when read?

2024-12-17 04:08:14 UTC

#Commodore64 Spindizzy credits screen says there is no cheat mode... But I just found a cheat mode... Putting the message "I LIED!" in memory $df00 will disable the game timers.
https://files.mastodon.social/media_attachments/files/113/666/194/039/746/033/original/8d1de87bd920ccbf.png

2024-12-06 16:33:23 UTC

This is going to be a long #Commodore64 video about how to transfer turbo tape multiload games to disk...
https://files.mastodon.social/media_attachments/files/113/606/837/575/478/985/original/fbdeb4d665dc2707.png

2024-09-22 23:15:43 UTC

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basically yes. The C64 CPU can be stopped by the cartridge port when DMA mode is activated.

2024-09-22 23:05:21 UTC

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this cartridge drives the bus in ultimax mode.
https://youtu.be/yy4Gr11EXHM?si=4Fw8UYbT7uafxhqv

2024-09-22 23:00:55 UTC

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yes

2024-09-11 23:52:48 UTC

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which rather negates your original post...

2024-09-11 23:50:15 UTC

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when you use a cloud service you're implicitly telling the computer to do what's implied in the work...

2024-09-11 23:45:35 UTC

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no you didn't explicitly decide to. You pressed the post button. The underlying technology is layers of abstraction.

2024-09-11 23:43:05 UTC

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were you asked to decide to resend lost network packets as part of the TCP reliable connections you used to post these messages to this platform?

2024-09-11 23:40:31 UTC

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that's not really feasible right now since systems have become rather more complex. The user cannot be involved in the minute details these days.

2024-08-18 02:37:52 UTC

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so its legs are just resting on solder resist covering the tracks?

2024-08-17 04:55:46 UTC

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unless the CPU was driving DRAM refresh timings.

2024-08-17 04:54:54 UTC

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correct :)

2024-08-15 15:21:14 UTC

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like if you were running telnet in a container with a VPN already configured.

2024-08-09 03:59:21 UTC

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I've battled audio quality issues in my videos.

2024-08-06 23:14:57 UTC

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I've been targeted by transphobic death threats. Even though I'm not trans. https://www.channelnewsasia.com/singapore/whistleblower-sues-singapore-kindness-movement-breach-pdpa-pdpc-4526636