Sprite_tm

2025-07-16 16:29:04

Sprite_tm

sprite_tm@social.spritesmods.com

On the bench today: a Learning Resources button stole... borrowed from my toddler. Has a li'l button on the side, press it to record a phrase.

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2025-07-16 16:49:32

Sprite_tm

sprite_tm@social.spritesmods.com

It's interesting that they did it this way around... it likely means that there's only around 40K of sample memory available, with the firmware containing the following 24K... leaving the remaining 450K of flash entirely empty and unusable. I guess they designed the system with a 64K flash chip in mind, but nowadays 512K is the cheapest you can get? Strange.

2025-07-16 16:55:57

Sprite_tm

sprite_tm@social.spritesmods.com

I'm wondering if I'm able to figure out what CPU this thing runs and change the firmware... could do something like put Never Gonna Give You Up in the remaining flash, then do something with a RNG and have 5% chance of it playing that rather than the recorded sample. It doesn't *look* like the firmware is encrypted or compressed, there are regions of consecutive bytes and null bytes in there. On the other hand, there aren't any strings (not that you'd necessarily expect any in a console-less microcontroller app) and no recognizable instruction alignment either. Plus, cpu_rec and isadetect.com do not detect anything sane in there.

2025-07-16 17:06:43

Sprite_tm

sprite_tm@social.spritesmods.com

Hm, sleepy time here. If anyone else wants to play along at home, here's a binary.