WORKBENCH DOCUMENTATION & TECHNICAL REFERENCE MANUAL

Machine Hubs (36 Retro Computer & Console Reference Hubs)

Dedicated board-level technical reference hubs for 23 vintage 8/16-bit computers (C64, VIC-20, C128, SX-64, PET, Plus/4 & C16, Amiga, Big-Box Amiga, ZX Spectrum, Sinclair QL, BBC Micro, Acorn, CPC 464/6128, Oric, Dragon 32/64, Atari 8-Bit, Atari ST, Apple IIe, TRS-80/CoCo, TI-99/4A, MSX, Luggables) and 13 classic video game consoles.

Open Bench Tools Hub → Browse 36 Machine Hubs → ← View Full All-in-One Manual
STEP 1 Identify Board & Revision

Open the Machine Hub to confirm your ASSY/PCB revision, IC socket map, and PSU specs.

STEP 2 Check Pinouts & Cables

Verify chip rails in the IC Pinout Analyzer and port wiring in Connector Reference.

STEP 3 Scope Signals & Media

Follow Diagnostic Flowcharts & Scope Traces or inspect disks/ROMs in the D64 Wasm Lab.

STEP 4 Calculate, Recap & Rescue

Size parts with Bench Calculators, order recap BOMs, or use the Rehoming & Donation Portal.

MODULE 02 23 Computer Hubs · 13 Console Hubs · Board Revisions Interactive Flowchart
Explore Central Machine Hub Index →

Machine Hubs (36 Retro Computer & Console Reference Hubs)

Dedicated board-level technical reference hubs for 23 vintage 8/16-bit computers (C64, VIC-20, C128, SX-64, PET, Plus/4 & C16, Amiga, Big-Box Amiga, ZX Spectrum, Sinclair QL, BBC Micro, Acorn, CPC 464/6128, Oric, Dragon 32/64, Atari 8-Bit, Atari ST, Apple IIe, TRS-80/CoCo, TI-99/4A, MSX, Luggables) and 13 classic video game consoles.

INTERACTIVE UI PREVIEW — MACHINE HUB REVISION & SUBSTITUTION SELECTOR 36 Hubs Live
PCB / ASSY Revision:
BOARD ARCHITECTURE & SOCKET MAP

Commodore 64 ASSY 250407 (1982–83)

  • CPU & Custom ICs: U7 MOS 6510 · U19 VIC-II (6567/6569) · U18 SID 6581 (12V) · U17 82S100 PLA
  • RAM Configuration: 8× 4164 (64K×1) at U9–U12 & U21–U24 + U6 2114 Colour SRAM
  • ROM Sockets: 24-pin 2364 Mask ROMs (U3 BASIC, U4 KERNAL, U5 CHAR)
CROSS-REFERENCED MODS & SUBSTITUTIONS
EPROM Adapter 2364 (24-Pin) → 27C64 (28-Pin): Reroute Pin 20 (/CS) and tie Pins 1, 26, 27, 28 (+5V) via adapter socket.
PLA / RAM Swap 82S100 PLA → GAL20V8 / PLAnkton: Runs cool at <25mA vs. 120mA+ original bipolar PLA thermal failure.
Interactive Preview: Switch between board revisions above to see how Smiggy's 36 Machine Hubs map socket locations, RAM/ROM jumpers, and IC adapters.

Core Capabilities & Coverage

  • Interactive Motherboard Revision / ASSY Selectors (e.g., C64 ASSY 250407, 250425, 250466, 250469; ZX Spectrum Issue 2 through +2A/+3; Amiga 500 Rev 3/5/6A/8A).
  • Complete IC Socket Location Maps with silkscreen designators (U1–U31, IC1–IC40), chip functions, and direct links to the IC Pinout Analyzer.
  • RAM/ROM jumper strap tables, clock crystal frequencies, and verified electrolytic capacitor tables per PCB revision.
  • Symptom-to-component fault checklists and inline oscilloscope probe buttons for instant board-level signal verification.

Step-by-Step Workbench Workflow

  1. 1
    Identify Your System & PCB Revision

    Open the Central Machine Hub Index (/hubs or /consoles), choose your platform, and match the silkscreened ASSY or Issue number on your motherboard using the interactive revision tabs at the top of the hub.

  2. 2
    Locate IC Socket Designators & Test Points

    Cross-reference board designators (such as U17 82S100 PLA or U7 6510 CPU on a C64, or IC6–IC13 4116 lower RAM on a ZX Spectrum) against the hub's IC table to see exact pinouts and expected rail voltages.

  3. 3
    Check RAM/ROM Jumper Configurations & Substitutions

    Review board-specific jumper settings and mod notes—such as converting 3-rail 4116 DRAM sockets to single-rail 4164 (+5V only), or adapting 24-pin 2364 mask ROMs (KERNAL/BASIC) to 28-pin 27C64/27C128 EPROMs.

  4. 4
    Work Through Common Failure Modes & Recap Tables

    Follow the machine's curated fault checklist (PSU over-voltage protection, black screen, garbage characters, missing audio, disk I/O failure) and open the linked Recap Guide to generate a verified capacitor BOM.

Workbench Pro-Tip

Many retro machines changed IC counts and capacitor polarities mid-production (for example, C64 shortboard ASSY 250469 consolidates eight 4164 DRAMs into two 41464 chips and uses a 64-pin SuperPLA). Always verify the exact ASSY tab before ordering parts.

Critical Voltage & Hardware Trap

Epoxy-Potted "Brick of Death" PSUs & Axial Capacitor Polarity: Never trust an original C64 epoxy-potted PSU or Atari "Ingot" supply without testing under load—a shorted 7805 regulator passes raw >9V DC straight to the +5V rail. On Amiga and ZX Spectrum boards, always double-check silkscreen polarity markings against the hub's recap notes.

Explore More Modules in the Smiggy Bench Tools Manual

Jump to another chapter below or open the complete all-in-one manual.

← Full Manual (/how-to) 01 IC Pinout Analyzer 03 D64 & Wasm File Lab 04 Connector & Port Pinouts 05 Diagnostics, Scope & Swaps 06 Calculators & Decoders 07 Hardware Showcase & Rehoming

Complete Smiggy Bench Tools & 36 Machine Hubs Quick-Reference Index

Every interactive utility, diagnostic reference, computer hub, and console hub documented in this manual — click any entry to launch it directly.

13 Interactive Browser Bench Tools (/bench-tools/*)

Signal & Trace Visualizer Interactive virtual oscilloscope and 8-channel logic analyzer comparing expected healthy waveforms against common hardware faults across C64, Amiga, Z80, TTL/CMOS, and RF/IR remotes with live ΔV/ΔT/f cursors. Open /bench-tools/signal-visualizer → Retro File Utilities (Wasm) Rust/WebAssembly-powered Commodore 1541 .D64 BAM and directory parser with .PRG extraction, a 6502/6510 disassembler with automatic IC pinout cross-linking, and a .BIN/.ROM patcher with CRC32 verification. Open /bench-tools/retro-file-utilities → Resistor & Capacitor Calculator Colour-band decoder for 4- and 5-band resistors with live tolerance range, plus SMD resistor and capacitor marking decoders. Open /bench-tools/resistor-capacitor-calculator → RF & Wireless Reference Filterable cards covering sub-GHz, ISM, Wi-Fi, Bluetooth, infrared, NFC/RFID and mesh standards, each with a full protocol deep dive. Open /bench-tools/rf-wireless-reference → IR vs. RF Remote ID A short decision tree that identifies a remote from non-invasive checks, then hands you the bench tests that confirm the verdict. Open /bench-tools/ir-vs-rf-remote-id → Circuit Block Visualizer Click through power input, regulator, MCU, oscillator and output stages, scope any test point, then inject a fault and watch it propagate. Open /bench-tools/circuit-block-visualizer → 555 Timer & LED Calc 555 astable calculator with a real-time waveform preview, alongside an LED resistor calculator that gives the nearest E24 value and wattage. Open /bench-tools/555-timer-led-calculator → Pinout Reference Interactive SVG diagrams and 43 dedicated port pages covering retro video/SCART, power supplies, joysticks, floppy/disk buses, expansion slots, RS-232, MIDI, USB-C, RJ45 and HDMI. Open /bench-tools/connector-pinout-reference → IC Pinout Quick-Finder Searchable pinout library for 74 retro CPUs, custom video/sound chips, DRAM/SRAM and 74/4000-series logic ICs, filterable by Machine Hub with colour-coded DIP/PLCC diagrams. Open /bench-tools/ic-pinout-finder → Ohm's Law Wheel Solve for voltage, current, resistance or power from any two known values, with the formula used shown for each result. Open /bench-tools/ohms-law-calculator → Hardware Diagnostics Choose a machine and a symptom, then follow a measurement-driven flowchart to the components most likely at fault. Open /bench-tools/hardware-diagnostics → Recap & Repair Reference Cross-checked capacitor lists by machine and board revision, filterable by family, each opening into a full recap guide. Open /bench-tools/recap-repair-reference → Substitution Guide Look up safe chip substitutions for retro DRAM, CPUs and 74-series logic, with red-flagged dangerous swaps and a logic family compatibility matrix. Open /bench-tools/substitution-guide →

36 Retro Computer & Video Game Console Machine Hubs (/hubs & /consoles)

C64 Hub VIC-20 Hub C128 Hub SX-64 Hub PET Series Hub TED Series Hub Amiga Hub Big-Box Amiga Hub ZX Spectrum Hub Sinclair QL Hub BBC Micro Hub Acorn Atom/Electron Amstrad CPC 464 Hub Amstrad CPC 6128 Hub Oric-1 & Atmos Hub Dragon 32/64 Hub Atari 8-Bit Hub Atari ST Hub Apple IIe Hub TRS-80 & CoCo Hub TI-99/4A Hub MSX Hub Osborne & Kaypro Hub NES / Famicom Hub SNES Hub Nintendo 64 Hub Game Boy / GBC Hub Genesis / Mega Drive Hub Master System Hub Sega Saturn Hub Game Gear Hub Sega CD / Mega-CD Hub PlayStation 1 Hub PC Engine / TG-16 Hub Atari 2600 / 7800 Hub Atari Lynx Hub

Frequently Asked Questions — Bench Tools & Machine Hubs

Do the .D64 Visualizer, 6502 Disassembler, and ROM Patcher upload my files to a server?

No. Every utility in Retro File Utilities runs 100% client-side in your browser using a Rust core compiled to WebAssembly. Your .D64 disk images, .PRG binaries, and .BIN/.ROM dumps never leave your machine.

How do I switch between Dark, Amber Terminal, Matrix CRT, and Workbench Light themes?

Use the theme toggle button in the top navigation bar or open the System Customization Panel in the footer. All bench tools, SVG pinouts, and UI previews inherit dynamic CSS custom properties so diagrams remain high-contrast in every palette.

How do I cross-reference a dead IC on a motherboard with a safe modern replacement?

First identify your board revision in its Machine Hub, click the suspect chip to inspect its IC Pinout and scope waveforms, and then check the Retro Logic & RAM Substitution Guide for drop-in equivalents and adapter pinouts (such as 4116→4164 or 2364→27C64).

Where can I find documentation on rare controllers (like the SV-129 foot pedal or Voice Master) or donate hardware?

Rare controllers and bench hardware are showcased across Repair & Bench Notes and the Rehoming Bench. To donate faulty or spare retro kit (with free UK shipping covered and a strict never-resold promise), visit Retro Donations.

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