MPU 7 - 32 bit BBP Pi [ 2 Hz Minecraft Redstone CPU ] @ModPunchtree
MPU 7 - 32 bit BBP Pi [ 2 Hz Minecraft Redstone CPU ]  @ModPunchtree
Uploaded April 2022 | Updated September 2026, 3 weeks ago
The MPU 7 is my latest and fastest Minecraft Redstone CPU.

This video is at 64x speed and the carpet mod tick speed is set to 2 times speed.

Here the MPU 7 is calculating Pi using the BBP formula with 32 bit fixed point values. Then it converts this result into base 10 and prints it to the display.

The flashing horizontal line is the cursor. This just shows what area of the screen the MPU 7 is currently writing to.

This program took a total of 3755 cycles (31 minutes and 17.5 seconds) to run. This includes the time spend initialising the registers/ram and the time draw to the display.

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
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MPU 7 - 32 bit BBP Pi [ 2 Hz Minecraft Redstone CPU ]

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