Femboy-8
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Author: Simone Battaglia

Forked from: Kain/Femboy-8

Project access type: Public

Description:

FEMBOY-8

Functional Electronic Machine Binary Operator Yes

8-bit CPU

Working on a NEW CPU: Femboy-16!


ASSEMBLER:

https://output.jsbin.com/wutikij

GPU:

https://circuitverse.org/users/214464/projects/cb-ppu


INSTRUCTION SET:
00: NOP - Nothing
01: HLT - Halt program
02: OUT [id] - Output the accumulator out of an output
03: LDI A, [d8] - Loads immediate 8 bit word into the accumulator
04: MOV [r], A - Move register to accumulator
05: MOV A, [r] - Move accumulator to register
06: INC [r] - Increment a register
07: DEC [r] - Decrememt a register
08: ADD [r], A - Add the accumulator from a register
09: SUB [r], A - Subtract the accumulator from a register
0A: AND [r], A - And the register and accumulator
0B: IOR [r], A - OR the register and accumulator
0C: XOR [r], A - XOR the register and accumulator
0D: NOT [r] - NOT a register
0E: SRR [r] - Barrel shift accumulator right
0F: SRL [r] - Barrel shift accumulator left
10: JUP [d8] - Jump to a location
11: JPP [r] - Jump to a register value
12: JPL A, [d8] - Jump if accumulator is less than 0
13: JZO A, [d8] - Jump if accumulator is 0
14: JPG A, [d8] - Jump if accumulator is greater than 0
15: JLE A, [d8] - Jump if accumulator is less than or equal to 0
16: JGE A, [d8] Jump if accumulator is greater than or equal to 0
17: JNZ A, [d8] Jump if accumulator is not 0
18: CLR [r] - Clear a register
19: INP [id] - Store INPUT id in accumulator
1A: MOV pA, [r] - Move the value at address A register r
1B:  MOV [r], pA - Move register r into address A
1C: MOV [p], A - Move a value in a pointer to the accumulator
1D: MOV A, [p] - Move the accumulator to a location
1E: MLT [r], A - Multiply register r by the accumulator
1F: DIV [r], A - Divide register r by accumulator


REGISTERS:
00: REGISTER 1
01: REGISTER 2
02: REGISTER 3
04: REGISTER 4
05: ZERO FLAG (R)
06:
PC (R)
07: ALU Result (R)


Update Notes:

V4:
So this is the 4th iteration of my CPU lol... I added a few programs for you all to try out and you can even use an assembler now!

V5:
Long time since I updated this... But I've added a GPU! It's called "Color burst" and you can go try out some premade programs I have added on it! There's an assembler guide with GPU dev guide and I encourage you all to go try and make some graphical programs! Also more docs can be found on it's project page.


To-Do:
Increase amount of registers to 8
Make a simple command line
Make a simple operating system for the CPU

Created: Sep 18, 2024

Updated: Sep 18, 2024


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