test: add real-BIOS CD boot smoke harness (test_cd_bios_boot)

Mirrors test_cd_hle_boot but forces virtualjaguar_cd_boot_mode=bios so
the real Atari Jaguar CD BIOS is loaded from VJ_TEST_CD_ROOT (default
test/roms/private). Discovers all .cue/.iso under that root, runs each
for VJ_TEST_CD_FRAMES (default 600 — enough to clear the BIOS animation
window and watch each disc reach its game-code entry point).

New make target: test-cd-bios-boot (parallel to test-cd-hle-boot, also
intentionally excluded from 'make test''s strict pass/fail loop).

Adds two diagnostic LOG lines around CDIntfOpenImage in retro_load_game
so silent disc-open failures are visible in the test log instead of
just retro_load_game failed.

Current real-BIOS baseline (600 frames):
  - All 9 cue discs advance through CD-AUTH bypass into game code
    (vs all 9 stuck in BIOS animation at 300 frames)
  - 8/9 then PC-OOB into garbage (stack/streaming corruption);
    Primal Rage stalls in BIOS at \$003616

Made-with: Cursor

Author: JoeMatt

.gitignore

@@ -28,6 +28,7 @@ test/*.dSYM/
 # test/roms/private/*
 !test/roms/private/.gitkeep
 !test/roms/private/README.md
+/test/test_cd_bios_boot
 /test/test_cd_hle_boot
 /test/test_dsp_instructions
 /test/test_gpu_instructions

Makefile

@@ -630,7 +630,7 @@ clean:
 TEST_CC     ?= $(CC)
 TEST_CFLAGS  = -O0 -g -Wno-incompatible-pointer-types
 TEST_LDFLAGS = -ldl
-TEST_BINS    = test/test_gpu_instructions test/test_dsp_instructions test/test_m68k_instructions test/test_irq test/test_hle_bios test/test_cd_hle_boot test/test_blitter_simd
+TEST_BINS    = test/test_gpu_instructions test/test_dsp_instructions test/test_m68k_instructions test/test_irq test/test_hle_bios test/test_cd_hle_boot test/test_cd_bios_boot test/test_blitter_simd
 
 test/test_gpu_instructions: test/test_gpu_instructions.c test/test_framework.h $(TARGET)
 	$(TEST_CC) $(TEST_CFLAGS) -o $@ $< $(TEST_LDFLAGS)
@@ -650,6 +650,9 @@ test/test_hle_bios: test/test_hle_bios.c test/test_framework.h $(TARGET)
 test/test_cd_hle_boot: test/test_cd_hle_boot.c test/test_framework.h test/cd_assertions.h $(TARGET)
 	$(TEST_CC) $(TEST_CFLAGS) -o $@ $< $(TEST_LDFLAGS)
 
+test/test_cd_bios_boot: test/test_cd_bios_boot.c test/test_framework.h test/cd_assertions.h $(TARGET)
+	$(TEST_CC) $(TEST_CFLAGS) -o $@ $< $(TEST_LDFLAGS)
+
 test/test_blitter_simd: test/test_blitter_simd.c src/blitter_simd.h $(TARGET)
 	$(TEST_CC) -O2 -o $@ test/test_blitter_simd.c src/blitter_simd_neon.c
 
@@ -681,10 +684,21 @@ test-cd-hle-boot: test/test_cd_hle_boot
 	echo ""; echo "(full log: test/cd_hle_boot_baseline.log; rc=$$rc)"; \
 	exit 0
 
+# Same shape as test-cd-hle-boot but exercises the real Atari Jaguar CD BIOS.
+# Requires the BIOS file to live under VJ_TEST_CD_ROOT (default test/roms/private).
+test-cd-bios-boot: test/test_cd_bios_boot
+	@echo ""; echo "=== CD real-BIOS boot smoke (TDD baseline; not part of strict test) ==="
+	@DYLD_LIBRARY_PATH=. LD_LIBRARY_PATH=. test/test_cd_bios_boot \
+		> test/cd_bios_boot_baseline.log 2>&1; \
+	rc=$$?; \
+	grep -aE '\[(RUN|PASS|FAIL|CRASH|FOCUS-SKIP|SKIP|PC-)\]|Discovered|---' test/cd_bios_boot_baseline.log; \
+	echo ""; echo "(full log: test/cd_bios_boot_baseline.log; rc=$$rc)"; \
+	exit 0
+
 clean-test:
 	rm -f $(TEST_BINS) $(addsuffix .dSYM,$(TEST_BINS))
 
-.PHONY: clean test test-build clean-test test-cd-hle-boot
+.PHONY: clean test test-build clean-test test-cd-hle-boot test-cd-bios-boot
 endif
 
 print-%:

libretro.c

@@ -1158,8 +1158,10 @@ bool retro_load_game(const struct retro_game_info *info)
     * and haveCDGoodness is set correctly. */
    if (jaguar_cd_mode)
    {
+      LOG_INF("[CD] Opening disc image: %s\n", cd_image_path);
       if (!CDIntfOpenImage(cd_image_path))
       {
+         LOG_ERR("[CD] CDIntfOpenImage failed for: %s\n", cd_image_path);
          if (videoBuffer)
          {
             free(videoBuffer);
@@ -1172,6 +1174,7 @@ bool retro_load_game(const struct retro_game_info *info)
          }
          return false;
       }
+      LOG_INF("[CD] Disc image opened OK\n");
    }
 
    JaguarInit();                                             // set up hardware