A Simple C++ implementation of the classic intel 8080 cpu with decimal arithmetic. At this point the cpu is complete (unimplemented codes below) and successfully passes the cpudiag test from Microcosm Associates found here and compiled using this javascript assembler.
- C++11
- cmake >= 3.0
Assuming you cloned and are inside the i8080 folder with a terminal you should just
mkdir build && cd build
cmake ..
make
./i8080
The i8080 emulator will then produce i8080.log which records the output of the cpu.
Some opcodes are not implemented given I had no means to test them. As such I have implemented all opcodes except illegal opcodes and the following:
- [0x20] - RIM
- [0x30] - SIM
- [0xD3] - OUTD
- [0xDB] - IND
As aformentioned The CPU has been tested against the cpudiag assembly program which for completeness is also included pre-assembled, with source and results. For those interested there is a bug in cpudiag discussed here. Which is accounted for in the main function implementation...after many many painful hours.
Presently I've implemented a debug class that produces i8080.log file in the i8080 directory. It records everything. For memory this includes read, write, addresses and values. For the CPU it includes instructions, register states and flags (in binary).
To date the cpu completes all tests successfully. These are listed as:
- [SUCCESS] TEST JUMP INSTRUCTIONS AND FLAGS
- [SUCCESS] TEST ACCUMULATOR IMMEDIATE INSTRUCTIONS
- [SUCCESS] TEST CALLS AND RETURNS
- [SUCCESS] TEST "MOV","INR",AND "DCR" INSTRUCTIONS
- [SUCCESS] TEST ARITHMETIC AND LOGIC INSTRUCTIONS
CCopyright (c) 2018 Christopher M. Short
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