Research Record III — AKBASCORE Silicon Hippocampus v1.4
https://doi.org/10.5281/zenodo.23434686
TL;DR: We built and experimentally verified a physical numerical memory engine that intervenes directly inside a frozen 72-billion-parameter transformer.
Instead of retrieving external text passages at inference time (conventional RAG), re-evaluating long input prompts, or merely replaying a saved KV cache, AKBASCORE captures intermediate hidden representations (H3) from the model's own computation, stores them as independent physical tensor cartridges, and reinjects them directly at the Layer-3 boundary (CUT3).
Three independently stored 10,000-token cartridges were assembled into a 30,031-position operational memory on a single NVIDIA A100-80GB, without changing the pretrained model weights.
This is not conventional KV caching. The defining mechanism is direct internal-state injection.
THE ARCHITECTURAL BREAKTHROUGH
Conventional approaches to long-term LLM memory generally rely on external retrieval, repeated context processing, or attention-cache preservation.
AKBASCORE takes a different route.
The frozen transformer processes source material once. At a model-specific intermediate boundary, we extract the numerical representation generated by its own layers.
That representation becomes a persistent, independently stored physical memory cartridge.
When the cartridge is mounted, the original source text is not resubmitted as an ordinary prompt.
Instead, the saved H3 representation is restored directly into the model's internal computational pathway. The downstream transformer layers resume computation from that injected numerical state.
The model is not fine-tuned. Its weights are not modified. The memory is carried by model-native numerical representations, not an external text database.
The key distinction is where the intervention occurs.
We are not asking the model to read a retrieved document again.
We are restoring a previously extracted intermediate state of the model's own computation.
HOW THE ENGINE WORKS
The Qwen2.5-72B implementation uses CUT3, the output boundary of transformer Layer 3.
During cartridge construction:
The frozen model processes each source excerpt in 256-token chunks.
The system captures the H3 hidden representation and the associated lower-layer numerical states.
H3 and the key/value tensors from Layers 0–3 are persisted as a physical cartridge.
The original source text is no longer required for subsequent cartridge mounting.
During cartridge reconstruction:
The saved numerical cartridge is loaded from storage.
Its positional representations are adjusted for the target memory layout.
The stored H3 representation is injected directly at CUT3.
Layers 4–79 reconstruct the remaining internal computational states.
The resulting memory becomes available to the frozen model for subsequent inference.
Key/value tensors participate in the reconstruction and integrity mechanism. They are not the defining innovation.
The central operation is direct restoration of intermediate hidden representations into the transformer computation itself.
THREE PHYSICAL CARTRIDGES — ONE 72B MODEL
The live experiment used:
Model: Qwen2.5-72B-Instruct
Parameters: 72 billion
Quantization: NF4, with BF16 computation
Transformer layers: 80
Hidden dimension: 8,192
Attention geometry: 64 query heads / 8 KV heads / 128 head dimension
Intervention boundary: CUT3
GPU: NVIDIA A100-SXM4-80GB
Three independent cartridges were constructed from 10,000-token excerpts:
Cartridge A — Pride and Prejudice
Cartridge B — Frankenstein
Cartridge C — The Adventures of Sherlock Holmes
Each cartridge occupies exactly 328,698,863 bytes on disk.
The combined operational memory contains 30,031 token positions.
The reconstructed 80-layer key/value memory occupies approximately 9.16 GiB.
These are physical numerical representations extracted from the transformer, not textual summaries, retrieved passages, fine-tuned adapters, or modifications to the model weights.
LIVE EXPERIMENTAL VERIFICATION
Session: Q72S-20261017-083524
The live Qwen2.5-72B engine completed:
11/11 scripted physical protocol trials.
17/17 engine checks.
8/8 append integrity checks.
11/11 additional live verification checks.
Three independently verified cartridge files.
Successful reconstruction of the combined A+B+C memory.
Exact SHA-256 preservation of previously mounted key/value states across all 80 layers during append operations.
Verification that the frozen-model weight sentinel remained unchanged.
Live examination of the reconstructed GPU memory across 80 transformer layers and 30,031 token positions.
The underlying TEST709 record also reports a peak GPU allocation of approximately 57.66 GiB during the three-cartridge protocol on an A100-80GB.
The implementation maintains a 9.0 GiB GPU safety-reserve requirement.
FIGURE 4 — INSIDE THE RECONSTRUCTED 72B MEMORY
Figure 4 presents a read-only measurement of the live 80-layer GPU key/value state across the 30,031-position combined memory.
The visualization exposes the three cartridge regions and their boundaries.
The CUT3 boundary separates the lower-layer states restored from persistent numerical cartridges from the downstream layers reconstructed by the frozen transformer.
This is a measurement of the actual reconstructed tensor state, not an illustrative or synthetic neural activation diagram.
The accompanying figures document the intervention protocol, physical storage architecture, reconstruction performance, observational question-answering results, and integrity verification.
HOT-SWAP AND INCREMENTAL RECONSTRUCTION
The memory cartridges can be independently mounted, appended, reordered, and restored.
Measured reconstruction times were approximately:
Single cartridge, 10,031 positions: 17.6 seconds for reconstruction, approximately 18.9 seconds end-to-end.
Two-cartridge assembly, 20,031 positions: approximately 46 seconds for reconstruction.
Three-cartridge assembly, 30,031 positions: approximately 74 seconds for reconstruction.
These are measured physical reconstruction operations, not instantaneous pointer switches.
The important result is not that rebuilding the internal state costs zero computation.
It is that the original source text does not need to be reprocessed through the complete transformer from the input layer. The persisted intermediate state provides a new computational starting point.
The append-integrity protocol verifies that previously mounted key/value states remain bitwise unchanged across all 80 layers.
SCIENTIFIC BOUNDARY
The physical reconstruction and integrity results are experimentally verified.
The semantic question remains separate.
Our demonstration uses public-domain literary classics, which may already be represented in the model's pretraining data. Therefore, correct answers about these books cannot independently establish that the information was acquired from the cartridges.
The current results demonstrate direct internal-state restoration, physical memory reconstruction, incremental assembly, and numerical integrity at 72B scale.
They do not yet establish causally isolated semantic transfer, general reasoning improvement, or complete comprehension of the stored books.
Those are the next experimental targets.
(Note: Subsequent Phase 2 testing will replace public-domain excerpts with unseen, post-2024 technical text and synthetic data to definitively isolate semantic transfer from pretraining memory.)
WHY THIS MATTERS
The architectural question is larger than how to extend a context window.
Can a transformer export part of its internal computation, preserve that numerical state independently of its weights, and later resume computation from the restored state?
AKBASCORE Silicon Hippocampus demonstrates a working physical implementation of that mechanism inside a frozen 72-billion-parameter model.
The significance is the separation of persistent numerical memory from the model's permanent parameters and from the original source text.
The result is an experimentally verified pathway for storing, transporting, assembling, and restoring model-native intermediate computational states.
If future controlled experiments establish reliable causal knowledge transfer and scalable addressing, this architecture could become a foundation for persistent modular memory in long-running AI systems.
This release documents the working engine and the evidence behind it.
RESEARCH LINEAGE
Research Record I — Qwen2.5-7B
https://doi.org/10.5281/zenodo.23381336
Research Record II — Mistral-7B, Silicon Hippocampus v1.4
https://doi.org/10.5281/zenodo.23418927
Research Record III — Qwen2.5-72B, Direct Internal-State Injection
https://doi.org/10.5281/zenodo.23434686
SOURCE CODE AND EXPERIMENTAL RECORDS
GitHub repository:
https://github.com/ceceli33/titan-cognitive-core-v3
Complete executable Qwen2.5-72B demonstrator:
https://github.com/ceceli33/titan-cognitive-core-v3/blob/main/MAM_full_QWEN_72B.py
The same code is divided into three consecutive parts for mobile users. Paste all three parts sequentially into the same Google Colab code cell and execute once.
Part 1:
https://github.com/ceceli33/titan-cognitive-core-v3/blob/main/MAM_part1_QWEN_72B.py
Part 2:
https://github.com/ceceli33/titan-cognitive-core-v3/blob/main/MAM_part2_QWEN_72B.py
Part 3:
https://github.com/ceceli33/titan-cognitive-core-v3/blob/main/MAM_part3_QWEN_72B.py
Live demonstration logs:
https://github.com/ceceli33/titan-cognitive-core-v3/blob/main/MAM_LOG1_QWEN_72B.log
https://github.com/ceceli33/titan-cognitive-core-v3/blob/main/MAM_LOG2_QWEN_72B.log
Underlying physical engine:
https://github.com/ceceli33/titan-cognitive-core-v3/blob/main/709.py
Underlying physical experiment log:
https://github.com/ceceli33/titan-cognitive-core-v3/blob/main/709.log
License:
https://github.com/ceceli33/titan-cognitive-core-v3/blob/main/LICENSE
AKBASCORE Research Software License. Research and educational use are permitted under the published terms; commercial use is subject to the license's consolidated annual revenue conditions.
Mustafa AkbaÅŸ
AkbasCore AI Teknoloji
Mersin, Türkiye
Copyright © 2026 Mustafa Akbaş