Uploaded February 2022 | Updated September 2026, 2 weeks ago

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The MPU 7 is my latest and fastest Minecraft Redstone CPU.

This video is at 4x speed and the carpet mod tick speed is set to 2 times speed.

Here the MPU 7 is sorting a reversed list of 15 numbers using parallel bubble sort. It is able to bubble up to seven numbers at the same time which makes the program run a lot faster.

Ignoring the time taken to initialise the RAM and print to the display - it took 556 cycles to sort the 15 values (4 minutes and 38 seconds)

Also I didn't realise the blinking cursor was broken until after I finished recording it and I didn't fancy recording it again. That's why the cursor is missing.

Join the URCL (Universal Reduced Computer Language) discord:
discord.gg/Nv8jzWg5j8

MPU 7 Specs:
• No command blocks or pistons
• 2 Hz clock speed (5 ticks or 0.5 seconds per clock pulse)
• 5 stage waterfall pipeline (Fetch1 - Fetch2 - Decode - Execute - Writeback)
• 10 general purpose simulated dual read registers (with no read before write hazards because of the automatic forwarding)
• 8 bit word length
• 256 word instruction ROM x2
• 32 bit instruction length (that includes an 8 bit immediate value)
• VLIW architecture
• 32 bit hardware BCD converter
• 8 bit hardware multiplier
• 8 bit hardware divider
• 8 bit RNG
• 64x32 pixel display (1x1 pixels) which can be shifted upwards 8 pixels whenever needed
• 1 frame buffer
• Full qwerty keyboard with arrow keys and function keys for user input
• 128 bytes of main RAM
• 256 bytes of screen RAM
• Up to 128 I/O ports
• External 8 kiB paging ROM for storing large amounts of data (Like Bad Apple!!)
• 7 testable flags
• Full 7 bit character set (a custom one, so not ASCII) which uses 4x8 characters
• Can be started, stopped and reset from the UI
• Almost fully compatible with URCL

MPU 7 ISA:
docs.google.com/spreadsheets/d/1fgXPalCBTGg-X3QGXmNagxAMHoiOW_9nbOgaJl7fFoY/edit?usp=sharing

MPU 7 World download is available in the URCL discord:
discord.gg/Nv8jzWg5j8

If you want to support me creating these videos, Patreon is:
patreon.com/modpunchtree
or my PayPal link is:
paypal.me/modpunchtree