VHDL CPU

How to run/test the rtl model

There are two possibilities to run testbench hex programs on the rtl-model.

Fast&Simple way (By Max)

Simulate the system_behavioural architecure, it loads the Memory.hex file in the same directory and works just like in functional model

Using the Bootloader (By Robert)

Simulate the system_bootloader architecture. This System uses a bootloader to load the program/testbench hex-file into the memory Use the python3 script memory_generate.py [path-to-testbench.hex] in the rtl_model directory to generate the Memory.hex file which is then loaded using the IO-Device. The bootloader needs 530,045ns to load, when it's done it jumps to Mem(0) and starts the loaded program.

Spec

Link

Aufteilung Befehle

RTL

Task	Ersteller
Memory	@alxppp
Register	@alxppp
Muxes	@alxppp
Simple shift	@alxppp
FSM	@RobMa
OP decode	@maxcpu
Adder	@RobMa
Out Device	@OrestisAlpos
In Device	@maxcpu

Implementierung

OP	Ersteller
LDC	@alxppp
LDD	@alxppp
LDR	@alxppp
STD	@alxppp
STR	@maxcpu
LDPC	@maxcpu
STPC	@maxcpu
JMP	@maxcpu
JZ	@RobMa [x]
JC	@RobMa [x]
JN	@RobMa [x]
JO	@RobMa [x]
JNZ	@OrestisAlpos[x]
JNC	@OrestisAlpos[x]
JNN	@OrestisAlpos[x]
JNO	@OrestisAlpos[x]
EXEC_ROL	@maxcpu
EXEC_ROLC	@maxcpu
EXEC_ROR	@maxcpu
EXEC_RORC	@maxcpu
EXEC_SUB	@RobMa
EXEC_SUBC	@RobMa
set_flags_logic	@RobMa [x]
set_flags_load	@RobMa [x]
EXEC_REA	@OrestisAlpos [x]
EXEC_REO	@OrestisAlpos [x]
EXEC_REX	@OrestisAlpos [x]
EXEC_SLL	@alxppp
EXEC_SRL	@alxppp
EXEC_SRA	@alxppp
IN	@OrestisAlpos
OUT	@OrestisAlpos
Trace_pack	@maxcpu
init_memory	@RobMa

Test

OP	Tester
NOP	@RobMa [xx]
STOP	@RobMa [xx]
ADD	@maxcpu [x]
ADDC	@maxcpu [x]
SUB	@OrestisAlpos [x]
SUBC	@OrestisAlpos [x]
NOT	@alxppp
AND	@alxppp
OR	@alxppp
XOR	@alxppp
REA	@RobMa [x][x]
REO	@RobMa [x][x]
REX	@RobMa [x][x]
SLL	@maxcpu [x]
SRL	@maxcpu [x]
SRA	@maxcpu [x]
ROL	@RobMa [x][x]
ROLC	@RobMa [x][x]
ROR	@RobMa [x][x]
RORC	@RobMa [x][x]
LDC	@OrestisAlpos [x]
LDD	@OrestisAlpos [x]
LDR	@OrestisAlpos [x]
STD	@OrestisAlpos [x]
STR	@OrestisAlpos [x]
IN	@maxcpu [x]
OUT	@maxcpu [x]
LDPC	@alxppp
STPC	@alxppp
JMP	@alxppp
JZ	@alxppp
JC	@alxppp
JN	@OrestisAlpos [x]
JO	@OrestisAlpos [x]
JNZ	@maxcpu [x]
JNC	@maxcpu [x]
JNN	@maxcpu [x]
JNO	@RobMa [x][x]

Assembler documentation

Usage

maxcpu_asm [-o outfile] [options] filename

maxcpu_asm reads assembly code from stdin and writes the resulting op code to stdout. You can redirect the output to a file with the -o option. Run maxcpu_asm -h for help.

Installation

• UNIX machines

  Run ./maxcpu_asm.

• Windows

  There are two ways to run the assembler on Windows.

  1. The easy way is to run maxcpu_asm.exe from the command line. Example to assemble sample_program.asm:

       cd C:\vhdl_cpu\assembler\
       .\maxcpu_asm.exe sample_program.asm
     

  2. The other way is to install the Ruby interpreter and run the program with ruby maxcpu_asm. This option allows you to modify the source code.