diff --git a/core/libs/prx/libSceAgc/Misc/src/RegisterDefaults.cpp b/core/libs/prx/libSceAgc/Misc/src/RegisterDefaults.cpp
index 820fb9a77..d5ff3372f 100644
--- a/core/libs/prx/libSceAgc/Misc/src/RegisterDefaults.cpp
+++ b/core/libs/prx/libSceAgc/Misc/src/RegisterDefaults.cpp
@@ -14,6 +14,10 @@ void* APS5_VABI sceAgcGetRegisterDefaults() {
     return Agc::Command::GetRegisterDefaults(0, false, __func__);
 }
 
+void* APS5_VABI sceAgcGetRegisterDefaultsInternal() {
+    return Agc::Command::GetRegisterDefaults(0, true, __func__);
+}
+
 void* APS5_VABI sceAgcGetRegisterDefaults2(std::uint32_t version) {
     return Agc::Command::GetRegisterDefaults(version, false, __func__);
 }
diff --git a/core/libs/prx/libSceAgc/tests/Commands.cpp b/core/libs/prx/libSceAgc/tests/Commands.cpp
index c5b5128af..8abf0f24a 100644
--- a/core/libs/prx/libSceAgc/tests/Commands.cpp
+++ b/core/libs/prx/libSceAgc/tests/Commands.cpp
@@ -15,6 +15,9 @@ extern "C" std::uint32_t* APS5_VABI sceAgcDcbClearState(CommandBuffer* buf, std:
 extern "C" std::uint32_t* APS5_VABI sceAgcDcbSetFlip(CommandBuffer* buf, std::uint32_t handle, std::int32_t index, std::uint32_t mode, std::int64_t argument);
 extern "C" int APS5_VABI sceAgcSuspendPoint();
 extern "C" int APS5_VABI sceAgcInit(std::uint32_t version);
+extern "C" void* APS5_VABI sceAgcGetRegisterDefaults();
+extern "C" void* APS5_VABI sceAgcGetRegisterDefaultsInternal();
+extern "C" void* APS5_VABI sceAgcGetRegisterDefaults2Internal(std::uint32_t version);
 extern "C" int APS5_VABI sceAgcUnknownInitState(std::uint32_t* state, std::uint32_t version);
 extern "C" std::uint32_t* APS5_VABI sceAgcDcbDrawIndexAuto(CommandBuffer* buf, std::uint32_t indexCount, std::uint64_t modifier);
 extern "C" std::uint32_t* APS5_VABI sceAgcDcbDrawIndexIndirect(CommandBuffer* buf, std::uint32_t dataOffsetInBytes, std::uint64_t modifier);
@@ -377,6 +380,9 @@ void testDefaults() {
             check(first != nullptr && first == Agc::Command::GetRegisterDefaults(version, internal, __func__), "unstable register defaults pointer");
         }
     }
+    auto* internalDefaults = sceAgcGetRegisterDefaultsInternal();
+    check(internalDefaults != nullptr && internalDefaults == Agc::Command::GetRegisterDefaults(0, true, __func__) && internalDefaults == sceAgcGetRegisterDefaults2Internal(0), "internal register defaults are not the baseline internal table");
+    check(internalDefaults != sceAgcGetRegisterDefaults(), "internal register defaults returned the public table");
     expectFailure([] { Agc::Command::GetRegisterDefaults(14, false, __func__); });
     expectFailure([] { Agc::Command::GetRegisterDefaults(0xffffffffu, true, __func__); });
 }
diff --git a/docs/dev/TechnicalDebt.md b/docs/dev/TechnicalDebt.md
index bdd321311..2cf1ae9b2 100644
--- a/docs/dev/TechnicalDebt.md
+++ b/docs/dev/TechnicalDebt.md
@@ -40,6 +40,7 @@ Throughout the project, every function at every stage either **does exactly what
 - [sceAvPlayerAddSource](../../core/libs/prx/libSceAvPlayer/src/Source.cpp) (libSceAvPlayer) - requests up to 4 additional decode-ahead video framebuffers from the memory replacement beyond `num_output_video_framebuffers` when memory is available; the console's internal buffering behaviour is unknown
 - [sceAgcDcbClearState](../../core/libs/prx/libSceAgc/DcbFlow/src/Control.cpp) (libSceAgc) - the (buffer, command) signature follows [SharpProspero](https://github.com/SvenGDK/SharpProspero/blob/main/src/SharpProspero/Interop/Agc/SceAgc.cs) and [OpenAGC](https://github.com/OpenAGC/OpenAGC/blob/main/src/game_compat.c), and the 2-dword CLEAR_STATE (0x12) packet is OpenAGC's; OpenAGC masks the command to 4 bits, here a command above 0xf throws, as the driver rejects that payload
 - [sceVideoOutRegisterBuffers2](../../core/libs/prx/libSceVideoOut/src/Buffer.cpp) (libSceVideoOut) - buffer option 8 (STRICT_COLORIMETRY) is presented as option 0, with the stored values unchanged; what the console changes for it is unknown. Only options 0 and 8 are accepted
+- [sceAgcGetRegisterDefaultsInternal](../../core/libs/prx/libSceAgc/Misc/src/RegisterDefaults.cpp) (libSceAgc) - returns the version 0 internal table, as `sceAgcGetRegisterDefaults` returns the version 0 public one; [OpenAGC](https://github.com/OpenAGC/OpenAGC/blob/main/src/game_compat.c) returns the table of the version passed to `sceAgcInit` instead, and null before it
 - [sceVideoOutRegisterBuffers2](../../core/libs/prx/libSceVideoOut/src/Buffer.cpp) (libSceVideoOut) - DCC buffers (category 1): `dcc_control` is taken as the CB_DCC_CONTROL block layout, only bits 0x10026c are accepted; `dcc_cb_register_clear_color` as the register-clear texel, only 32-bit values are presented
 - [sceVideoOutIsOutputSupported](../../core/libs/prx/libSceVideoOut/src/Output.cpp) (libSceVideoOut) - output mode encoding unknown: every mode except the default reports not supported (0), and `sceVideoOutConfigureOutput` returns `VIDEO_OUT_ERROR_UNAVAILABLE_OUTPUT_MODE` for it, instead of returning `VIDEO_OUT_ERROR_UNSUPPORTED_OUTPUT_MODE` for values the console does not define. PPSA12544 probes `0xd000000a` and selects 7680 pixels when it is supported, 3840 otherwise
 - [sceVideoOutOpen](../../core/libs/prx/libSceVideoOut/src/Output.cpp) (libSceVideoOut) - the open param's first word is unknown (PPSA21564 passes 16; it is not the byte size, since the affinity mask is at offset 16); only 16 is accepted. Whether the param continues past offset 24 is also unknown