Project to develop as close to cycle-accurate of an Intel 8080 emulator as I can. It passes the full test suite found here.
I created this for use with my Space Invaders emulator.
- A c++ compiler
- CMake version 3.26+
- CMake build generator
Using CMake's FetchContent, add this to your CMakeLists.txt file:
include(FetchContent)
FetchContent_Declare(
Intel8080
GIT_REPOSITORY "https://github.com/harrow22/Intel8080.git"
)
set(INTEL8080_TESTS OFF)
FetchContent_MakeAvailable(Intel8080)
Then you can just link it to your executable using target_link_libraries.
See header file
git clone https://github.com/harrow22/Intel8080.git
cd Intel8080/
cmake -S . -B build -G your_generator -DCMAKE_BUILD_TYPE=RELEASE
cmake --build build --config Release
build/tests/Intel8080_test.exe <ARGUMENTS>...
By default, it will write output to stdout. Running it on my i5-8250U on Windows 11 produces this,
*** TEST: TST8080.COM
MICROCOSM ASSOCIATES 8080/8085 CPU DIAGNOSTIC
VERSION 1.0 (C) 1980
CPU IS OPERATIONAL
*** 651 instructions executed on 4924 cycles (expected=4924, diff=0) in 6 ms
*** TEST: 8080PRE.COM
8080 Preliminary tests complete
*** 1061 instructions executed on 7817 cycles (expected=7817, diff=0) in 1 ms
*** TEST: CPUTEST.COM
DIAGNOSTICS II V1.2 - CPU TEST
COPYRIGHT (C) 1981 - SUPERSOFT ASSOCIATES
ABCDEFGHIJKLMNOPQRSTUVWXYZ
CPU IS 8080/8085
BEGIN TIMING TEST
END TIMING TEST
CPU TESTS OK
*** 33971311 instructions executed on 255653383 cycles (expected=255653383, diff=0) in 2.820 sec
*** TEST: 8080EXM.COM
8080 instruction exerciser
dad <b,d,h,sp>................ PASS! crc is:14474ba6
aluop nn...................... PASS! crc is:9e922f9e
aluop <b,c,d,e,h,l,m,a>....... PASS! crc is:cf762c86
<daa,cma,stc,cmc>............. PASS! crc is:bb3f030c
<inr_,dcr_> a................... PASS! crc is:adb6460e
<inr_,dcr_> b................... PASS! crc is:83ed1345
<inx,dcx> b................... PASS! crc is:f79287cd
<inr_,dcr_> c................... PASS! crc is:e5f6721b
<inr_,dcr_> d................... PASS! crc is:15b5579a
<inx,dcx> d................... PASS! crc is:7f4e2501
<inr_,dcr_> e................... PASS! crc is:cf2ab396
<inr_,dcr_> h................... PASS! crc is:12b2952c
<inx,dcx> h................... PASS! crc is:9f2b23c0
<inr_,dcr_> l................... PASS! crc is:ff57d356
<inr_,dcr_> m................... PASS! crc is:92e963bd
<inx,dcx> sp.................. PASS! crc is:d5702fab
lhld nnnn..................... PASS! crc is:a9c3d5cb
shld nnnn..................... PASS! crc is:e8864f26
lxi <b,d,h,sp>,nnnn........... PASS! crc is:fcf46e12
ldax <b,d>.................... PASS! crc is:2b821d5f
mvi <b,c,d,e,h,l,m,a>,nn...... PASS! crc is:eaa72044
mov <bcdehla>,<bcdehla>....... PASS! crc is:10b58cee
sta nnnn / lda nnnn........... PASS! crc is:ed57af72
<rlc,rrc,ral,rar>............. PASS! crc is:e0d89235
stax <b,d>.................... PASS! crc is:2b0471e9
Tests complete
*** 2919050698 instructions executed on 23803381171 cycles (expected=23803381171, diff=0) in 3.33 min
Done. Total time elapsed 3.35 min
which, admittedly, is pretty slow compared to some, but I wasn't necessarily developing this for speed.
-debug- the processor state will be output during M1 cycle of each instruction-v- (requires-debug) the state of the processor's bus lines will be output during every read/write cycle
Warning
If you redirect stdout to a file with -debug enabled, it will output many GBs of data
- Intel 8080 user manual (ch. 2-4)
- floooh's blog post for the goto label idea
- superzazu's 8080 for comparable log files
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