0057: Custom EEPROM Replacement | 16-Bit Computer From Scratch

* Description* I have a problem. 256 k-bit (32 k-Byte) EEPROM are no longer produced and are quite expensive. Considering the number of EEPROM I will need for the control logic, this is not going to work. In this video I tackle the EEPROM problem, creating a custom replacement using SRAM. As you may have come to expect with my videos, it does not go perfectly. I learn a lot about diodes and currents along the way. Please see the following link for more information. https://www.autodesk.com/products/fusion-360/blog/schottky-diodes/ *Chapters:* 0:00 Intro 2:07 The Starting Point 3:51 SRAM 4:59 The Plan 7:47 Component Review 8:35 Diode Specs and Choice 11:22 "Mock-Up" 14:59 Shop Work 16:53 Preparing the Strip Board 18:49 Initial Assembly 22:15 Cleaning Up My Mess 24:41 Pull-Up Resistor 25:47 Final Solder-Up 27:02 Sanity Checks 28:57 Stepping Back and Other Corrections 31:16 The Testing Deteriorates 32:55 Diode Explanation (?) 36:46 Replacing the Diode 38:05 Testing the New Diode 40:00 Wrap-Up *Resources:* * 16-Bit Computer From Scratch Complete Playlist: https://www.youtube.com/watch?list=PLUF7WfBe0k3g9wpTtg41QP3jl5y8T1aGV * ALU Playlist: https://youtube.com/playlist?list=PLUF7WfBe0k3hUjV-G_ApJ1jRvpVhnAkqG * Clock Module Playlist: https://youtube.com/playlist?list=PLUF7WfBe0k3grwqFJM1aVwYW6K9bRCkGN * Register Module Playlist: https://youtube.com/playlist?list=PLUF7WfBe0k3h1K0GHuQcwE9RUwpX6pBFm * Intruction Cycle Playlist: https://www.youtube.com/playlist?list=PLUF7WfBe0k3hAeAdKv5JcBrV_JbujD6l_ * Memory Module Playlist: https://youtube.com/playlist?list=PLUF7WfBe0k3ixg4C006_Uq6aZ8vYzlPSM * KiCad Playlist: https://youtube.com/playlist?list=PLUF7WfBe0k3jGLDCGYyv_KxkEMcUfhyN0 * Assembler Source Code: https://github.com/eryjus/asm/tree/v0.0.5 * Control Logic Source Code: https://github.com/eryjus/control-logic/tree/v0.0.7 * Simple Test Source Code: https://github.com/eryjus/16BCFS-tests/tree/Video-0056 * CircuitVerse Project Link: https://circuitverse.org/users/160845/projects/16-bit-computer-from-scratch *Additional Tags:* #Homebrew #Breadboard #PCB #KiCad #74LS #IC #SMD #schematic #CircuitVerse