diff --git a/.github/workflows/package.yml b/.github/workflows/package.yml
index 46bfe02fd..1525cdc3f 100644
--- a/.github/workflows/package.yml
+++ b/.github/workflows/package.yml
@@ -44,6 +44,14 @@ jobs:
           make --silent -j 4
           mkdir -p ${{ env.LIBRETRO_CORES_DIR }}
           mv stella2014_libretro.so ${{ env.LIBRETRO_CORES_DIR }}
+      - name: 'Build "atari800" core'
+        if: steps.cache.outputs.cache-hit != 'true'
+        run: |
+          git clone https://github.com/libretro/libretro-atari800
+          cd libretro-atari800/
+          make --silent -j 4
+          mkdir -p ${{ env.LIBRETRO_CORES_DIR }}
+          mv atari800_libretro.so ${{ env.LIBRETRO_CORES_DIR }}
       - name: Build Mesen-X core
         if: steps.cache.outputs.cache-hit != 'true'
         run: |
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7bfb3572a..dd8bd11eb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -52,6 +52,12 @@ if(NOT CMAKE_CROSSCOMPILING)
     PATHS ENV EMUTEST_DIR)
   message(STATUS "Emutest test runner: ${EMUTEST_COMMAND}")
 
+  find_library(LIBRETRO_ATARI800_CORE
+    NAMES
+    atari800_libretro.so atari800_libretro.dylib atari800_libretro.dll
+    PATHS /lib64/libretro ENV LIBRETRO_CORES_DIR)
+  message(STATUS "Libretro Atari800 core: ${LIBRETRO_ATARI800_CORE}")
+
   find_library(LIBRETRO_STELLA_CORE
     NAMES
     stella2014_libretro.so stella2014_libretro.dylib stella2014_libretro.dll
diff --git a/README.md b/README.md
index 548da0b57..4e6f4b1dd 100644
--- a/README.md
+++ b/README.md
@@ -306,14 +306,21 @@ Copy `test/mesen_settings.xml` to this folder.
 
 Install emutest (requires Go 1.21):
 ```console
-$ go install https://github.com/kivutar/emutest
+$ go install github.com/kivutar/emutest@latest
 ```
 
-Make sure `$GOBIN` (usually `~/go/bin`) is included in your PATH environment variable so that CMake can find the binary, or set the `EMUTEST_DIR` environment variable to point to this directory before running `cmake -G` for the first time.
+Make sure `$GOBIN` (usually `~/go/bin`) is included in your `PATH`
+environment variable so that CMake can find the binary, or set the
+`EMUTEST_DIR` environment variable to point to this directory before
+running `cmake -G` for the first time.
+
+You can verify emutest with `emutest -h < /dev/null` on the
+command-line.
 
 Build Libretro cores for desired target(s):
 
 * Atari 2600 - https://github.com/libretro/stella2014-libretro
+* Atari 800 - https://github.com/libretro/libretro-atari800
 * NES - https://github.com/NovaSquirrel/Mesen-X
 
 Copy the output Libretro core library files (they have extensions .so | .dylib | .dll) to a shared directory, maybe `$HOME/libretro`.
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 05872ae69..329344381 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -16,6 +16,7 @@ function(add_test_target target)
       -DLLVM_MOS=${llvm_mos}
       -DMESEN_COMMAND=${MESEN_COMMAND}
       -DEMUTEST_COMMAND=${EMUTEST_COMMAND}
+      -DLIBRETRO_ATARI800_CORE=${LIBRETRO_ATARI800_CORE}
       -DLIBRETRO_STELLA_CORE=${LIBRETRO_STELLA_CORE}
       -DLIBRETRO_MESEN_CORE=${LIBRETRO_MESEN_CORE}
       -DCMAKE_C_FLAGS=${config_flag}
@@ -41,3 +42,4 @@ add_test_target(nes-unrom)
 add_test_target(nes-unrom-512)
 add_test_target(atari2600-4k)
 add_test_target(atari2600-3e)
+add_test_target(atari8-dos)
diff --git a/test/atari8-dos/CMakeLists.txt b/test/atari8-dos/CMakeLists.txt
new file mode 100644
index 000000000..a90f04aa5
--- /dev/null
+++ b/test/atari8-dos/CMakeLists.txt
@@ -0,0 +1,5 @@
+cmake_minimum_required(VERSION 3.18)
+
+project(test-atari8-dos LANGUAGES C)
+
+include(./test.cmake)
diff --git a/test/atari8-dos/hw.c b/test/atari8-dos/hw.c
new file mode 100644
index 000000000..1992c42c5
--- /dev/null
+++ b/test/atari8-dos/hw.c
@@ -0,0 +1,7 @@
+
+#include <stdio.h>
+
+int main(void) {
+  puts("atari says hello");
+  for(;;);
+}
diff --git a/test/atari8-dos/test.cmake b/test/atari8-dos/test.cmake
new file mode 100644
index 000000000..e898a0746
--- /dev/null
+++ b/test/atari8-dos/test.cmake
@@ -0,0 +1,9 @@
+
+include(../test.cmake)
+
+#TODO; zp test
+#TODO; .bss test
+#TODO; .data test
+
+add_a8_test(hw ../atari8-dos)
+set_property(TEST test-hw PROPERTY ENVIRONMENT EMUTEST_FB_CRC_PASS=000000000)
diff --git a/test/test.cmake b/test/test.cmake
index 9ed257528..f51b752be 100644
--- a/test/test.cmake
+++ b/test/test.cmake
@@ -31,6 +31,14 @@ function(add_no_compile_test target)
   set_property(TEST ${target}-no-compile PROPERTY WILL_FAIL YES)
 endfunction()
 
+function(add_a8_test name)
+  set(source_dir ".")
+  if(ARGC GREATER 1)
+    set(source_dir ${ARGV1})
+  endif()
+  add_emutest_test(${name} xex ${source_dir} LIBRETRO_ATARI800_CORE)
+endfunction()
+
 function(add_vcs_test name)
   set(source_dir ".")
   if(ARGC GREATER 1)