Ctrl+K

🏠 RetroSix Wiki

💡 Learn Electronics

📄 BGA Reballing & Reflow

📄 Logic Chip Families

📄 Byte Swapping (BIOS Files)

📄 Digital Logic Levels

📄 CXA2075 Upgrade (CXA1145)

📄 Mic / Line Audio Levels

📺 Video Standards

📄 YUV vs YCbCr vs RGB (Color Space)

📄 RGB Formats

📄 Composite (CVBS)

📄 S-Video (Y/C)

📄 Component (YPbPr)

📄 VGA (RGBHV)

📄 Voltage Levels

📄 CleanRGB SCART Cables

📄 CleanComp Setup

📄 CleanRGB Setup

📄 Power Supply Details

📄 Zilog Z80 CPU

📄 IC Manufacturer Logos

📄 LCD Ribbon Repair

📄 AV Pinout (Amiga Personal Computers)

📄 Kickstart ROMs (Amiga)

📄 PC Floppy Drive In Amiga

📄 Amiga Floppy Disk On PC

📄 Gotek FlashFloppy (Amiga)

📄 X-Copy Clone Disks (Amiga)

📄 Clone Amiga Hard Drive to PC (Amiga)

📄 DiagROM (Amiga 500)

📄 LHA Extractor Install (Amiga)

📄 WHDLoad Install (Amiga)

📄 PiStorm Emu68 Imager (Amiga)

📄 PiStorm Flash CPLD (Amiga)

📄 PiStorm Emu68 SD Card (Amiga)

📄 PiStorm Emu68 Format Drives (Amiga)

📄 HDF to Emu68 (Amiga)

📄 Loading File on Startup (Amiga)

📄 Creating Shortcut On Desktop (Amiga)

📄 Power Supply (Amiga 500)

📄 Minimum Boot (Amiga 500)

📄 Fat Agnus (Amiga 500)

📄 Gary (Amiga 500)

📄 Denise (Amiga 500)

📄 Odd CIA (Amiga 500)

📄 Chip RAM (Amiga 500)

📄 Jumpers (Amiga 500)

📄 Common Faults (Amiga 500)

📄 Basic Usage (Amiga 600)

📄 Schematics (Amiga 600)

📄 Power Circuit (Amiga 600)

📄 Floppy Disc (Amiga 600)

📄 Mouse & Joystick (Amiga 600)

📄 No Screen (Amiga 600)

📄 White Screen (Amiga 600)

📄 PiStorm (Amiga 600)

📄 PiStorm Setup (Amiga 1200)

📄 Amiga OS 3.2 Install (Amiga 1200)

📄 Boot Diagnostics (Amiga 1200)

📄 Solid Color Screen (Amiga 1200)

📄 Power Up Basics (Amiga CD32)

📄 CleanRGB Install (Amiga CD32)

📄 DiagROM (Amiga CD32)

📄 Basics (Macintosh SE/30)

📄 Power / AV Pinout (Macintosh SE/30)

📄 Minimum Boot (Macintosh SE/30)

📄 Very Minimal Boot (Macintosh SE/30)

📄 68k Initial Boot (Macintosh SE/30)

📄 Initial Video Boot (Macintosh SE/30)

📄 Interboard Ribbon (Atari 2600)

📄 Schematics (Atari 2600)

📄 Hardware Overview (Atari 2600)

📄 Joysticks (Atari 2600)

📄 TIA Chip (Atari 2600)

📄 Video / Button Hex Buffer (Atari 2600)

📄 Extracting Composite Video (Atari 2600)

📄 TIA Video Faults (Atari 2600)

📄 Jailbars Fix (Atari 2600)

📄 CleanComp Install (Atari 5200)

📄 Schematics (Atari 7800)

📄 Hardare Overview (Atari 7800)

📄 Video Output (Atari 7800)

📄 Schematics (Atari Jaguar)

📄 Power Circuit (Atari Jaguar)

📄 BIOS Boot (Atari Jaguar)

📄 Black Screen (Atari Jaguar)

📄 Red Screen Boot (Atari Jaguar)

📄 Audio Circuit (Atari Jaguar)

📄 Video Output (Atari Jaguar)

📄 Tom IC (Atari Jaguar)

📄 UART JagLink (Atari Jaguar)

📄 50Hz /60Hz Mod (Atari Jaguar)

📄 Region Free BIOS (Jaguar)

📄 Schematics (Atari Lynx)

📄 Safe Boot (Atari Lynx)

📄 Power Circuit (Atari Lynx)

📄 CleanPower Install (Atari Lynx)

📄 DC Power Supply (Atari Lynx)

📄 The Mikey ASIC (Atari Lynx)

📄 Schematics (Atari Lynx II)

📄 Board Scans (Atari Lynx II)

📄 Safe Boot (Atari Lynx II)

📄 Power Circuit (Atari Lynx II)

📄 CleanPower Install (Atari Lynx II)

📄 The Suzy ASIC (Atari Lynx II)

📄 The Hayato ASIC (Atari Lynx II)

📄 Audio Circuit (Atari Lynx II)

📄 LCD Circuit (Atari Lynx II)

📄 LCD Interface (Atari Lynx II)

📄 LCD Enable Pin (Atari Lynx II)

📄 Reading Game Cartridge (Atari Lynx II)

📄 Hayato / Mickey / Suzy Variations (Atari Lynx II)

📄 Game LCD Frequencies (Atari Lynx II)

📄 Basics (BBC Micro)

📄 RGB Port Pinout (BBC Micro)

📄 Boot Up Diagnostics (BBC Micro)

📄 Drawing Graphics (BBC Micro)

📄 Loading from Floppy (BBC Micro)

📄 1770 Floppy Upgrade (BBC Micro)

📄 Programming ROMs (BBC Micro)

📄 Single Beep _ Cursor (BBC Micro)

📄 Schematics (Commodore 16)

📄 Power Circuit (Commodore 16)

📄 CPU 8501 (C16)

📄 Schematics (Commodore 64)

📄 Basics (Commodore 64)

📄 Cassette Tape (Commodore 64)

📄 1541 Floppy (Commodore 64)

📄 Joysticks (Commodore 64)

📄 Power Up Basics (VIC-20)

📄 Keyboard (VIC-20)

📄 Programmers Aid (VIC-20)

📄 Diagnostics (VIC-20)

📄 Schematics (Dreamcast)

📄 Region Free BIOS (Dreamcast)

📄 Region Change (Dreamcast)

📄 Minimum Boot (Dreamcast)

📄 GDEmu (Dreamcast)

📄 GB CleanAmp Install Guide

📄 GB CleanPower Install Guide

📄 GBP IPS Screen Install

📄 GBP CleanAmp Install Guide

📄 GBA-SP Board Scans

📄 Dehum Dehiss: Removing audio noise from GBA SP

📄 Battery Charge Circuit (GBA SP)

📄 Power Rails (Game Boy Advance SP)

📄 USB-C Charging (GBA SP)

📄 GBA-SP CleanAmp Install Guide

📄 Diode Readings (GBA SP)

📄 Schematics (Game Gear)

📄 Board Scans (Game Gear)

📄 RePCB 2-ASIC (Game Gear)

📄 Hardware Overview (Game Gear)

📄 Model Versions (Game Gear)

📄 Soft Start / Fast Reset (Game Gear)

📄 Getting to Red Light Boot (Game Gear)

📄 Zombie Boot (Game Gear)

📄 ASIC Dead Test (Game Gear)

📄 Reading Game Cartridge (Game Gear)

📄 LCD Circuit (Game Gear)

📄 Visual Diagnostics (Game Gear)

📄 Audio Noises (Game Gear)

📄 TMSS Blue Splash Screen (Game Gear)

📄 VA0/VA1 LCD Interface (Game Gear)

📄 VA4 VA5 LCD Interface (Game Gear)

📄 Capacitor Replacement (Game Gear)

📄 CleanScreen v1.0 Game Gear

📄 CleanScreen V3.0 Game Gear (VA0/1/2)

📄 CleanScreen v3.1 Game Gear (VA0/1/2)

📄 Change Language (GameCube)

📄 Power Up Basics (Dell XPS 2023)

📄 Thermals (Dell XPS 2023)

📄 Schematics (Intellivision)

📄 Required Stability Fixes (Intellivision)

📄 Trace Map (Intellivision)

📄 Power Circuit (Intellivision)

📄 Initial Boot (Intellivision)

📄 Operation (Intellivision)

📄 RF Module (Intellivision)

📄 Game Load (Intellivision)

📄 Video Output (Mattel Intellivision)

📄 Black / No Screen (Intellivision)

📄 IC Orientation (Intellivision)

📄 Region Free (NES)

📄 Schematics (Neo Geo AES)

📄 AV Pinout (Neo Geo AES)

📄 Initial Power Up (Neo Geo AES)

📄 Reset Boot Test (Neo Geo AES)

📄 Graphics Rendering (Neo Geo AES)

📄 LSPC Line Sprite Processor (Neo Geo AES)

📄 Graphics Processor (Neo Geo AES)

📄 Audio Circuit (Neo Geo AES)

📄 Diagnostic BIOS (Neo Geo AES)

📄 Chroma Clock Generator (Neo Geo AES)

📄 System Clocks (Neo Geo AES)

📄 CXA Video Encoder (Neo Geo AES)

📄 Card Interface (Neo Geo AES)

📄 Memory Card (Neo Geo AES)

📄 CleanRGB Install (Neo Geo AES)

📄 RGB CSYNC Mod (Neo Geo AES)

📄 RGB Voltage Levels (Neo Geo AES)

📄 RGB CleanRGB Results (Neo Geo AES)

📄 Jailbar Fix (Neo Geo AES)

📄 Checkerboard Fix (Neo Geo AES)

📄 Ghosting Fix (Neo Geo AES)

📄 UniBIOS (Neo Geo AES)

📄 Diagnostics BIOS (Neo Geo AES)

📄 Visual Diagnostics (Neo Geo AES)

📄 CleanPower USB-C (Neo Geo AES)

📄 CleanLight RGB (Neo Geo AES)

📄 Power Up Basics (Neo Geo MVS)

📄 Z80 Error (Neo Geo MVS)

📄 Power Up Basics (Neo Geo MVS MV6)

📄 Power Up Basics (Neo Geo CDZ)

📄 AV Pinout (Neo Geo CDZ)

📄 Video RAM (Neo Geo CDZ)

📄 Laser Tuning (Neo Geo CDZ)

📄 Assembly (Nintendo Game & Watch)

📄 ROM Hacks (Game & Watch New)

📄 Board Scans (Nintendo Switch)

📄 First Stage Boot Short Checks

📄 Dead Short Checks (Nintendo Switch)

📄 Error Codes (Nintendo Switch)

📄 3.3V Regulator Checks

📄 Full Boot from Bench Power

📄 BQ24193 Battery Charger

📄 MAX77620 CPU Regulator

📄 eMMC Booting

📄 Joy Cons (Nintendo Switch)

📄 Diagnostics Power Draws (Nintendo Switch)

📄 RCM Hekate Setup (Nintendo Switch)

📄 RCM Backup eMMC (Nintendo Switch)

📄 RCM Replace eMMC (Nintendo Switch)

📄 RCM Copy Game Saves (Nintendo Switch)

📄 RCM Diagnostics (Nintendo Switch)

📄 Picofly Hwfly RP2040 (Nintendo Switch)

📄 Android 11 (Nintendo Switch)

📄 Power Up Basics (Panasonic 3DO)

📄 Game Load (Panasonic 3DO)

📄 Disassembly (Panasonic Q)

📄 Assembly (Panasonic Q)

📄 Power Up Basics (Panasonic Q)

📄 Power Circuit (Panasonic Q)

📄 Systematic Bring Up (Panasonic Q)

📄 Ribbon Connections (Panasonic Q)

📄 Disc Drive (Panasonic Q)

📄 F76 Error (Panasonic Q)

📄 PicoBoot Install (Panasonic Q)

📄 Power Up Basics (PC Engine LT)

📄 Power Regulators (PC Engine LT)

📄 Bypass Power (PC Engine LT)

📄 LCD Interface (PC Engine LT)

📄 Backlight Circuit (PC Engine LT)

📄 Contrast Circuit (PC Engine LT)

📄 Schematics (PC Engine)

📄 AV Pinout (PC Engine)

📄 Board Scans (PC Engine)

📄 Visual Diagnostics (PC Engine)

📄 Power Up Basics (PC Engine Duo)

📄 AV Pinout (PC Engine Duo)

📄 RGB Video Output (PC Engine Duo)

📄 Audio Circuit (PC Engine Duo)

📄 Laser Tuning (PC Engine Duo)

📄 Laser RF Amp Circuit (PC Engine Duo)

📄 Internal Memory Backup RAM (PC Engine Duo)

📄 Power Up Basics (PC Engine Duo-R)

📄 AV Pinout (PC Engine Duo-R)

📄 RGB Video Output (PC Engine Duo-R)

📄 Laser Tuning (PC Engine Duo-R)

📄 Schematics (PC Engine GT)

📄 Board Scans (PC Engine GT)

📄 Initial Power Up (PC Engine GT)

📄 Power From Bench (PC Engine GT)

📄 5V Circuit (PC Engine GT)

📄 Backlight Driver (PC Engine GT)

📄 LCD Circuit (PC Engine GT)

📄 Audio Circuit (PC Engine GT)

📄 Front Button Board (PC Engine GT)

📄 RGB LCD Install (PC Engine GT)

📄 PSIO Switchboard Installation (PS1)

📄 PsNee Region Free Installation (PS1)

📄 Laser Tuning (PS1)

📄 AV Output (PS2)

📄 Laser Tuning (PS2)

📄 Syscon Diagnostics (PS3)

📄 PlayStation 4

📄 Standby Power Checks (PS5)

📄 PS5 HDMI Port

📄 Power & Charger IC (PS Vita)

📄 AV Pinout (Master System)

📄 Model Variants (Master System)

📄 CleanRGB Install (Master System)

📄 Board Scans (Master System 2)

📄 Region Switching (Master System 2)

📄 Jailbar Fix (Master System 2)

📄 Hardware Overview (Sega Mega CD)

📄 Board Scans (Sega Mega CD)

📄 Power Circuit (Sega Mega CD)

📄 Side Connector (Sega Mega CD)

📄 Boot Up Diagnostics (Mega CD)

📄 First Stage Boot (Mega CD)

📄 Second Stage Boot (Sega Mega CD)

📄 Third Stage Boot (Mega CD)

📄 Mega CD Engine Pinout (Sega Mega CD)

📄 Stuttering Skipping Audio (Sega Mega CD)

📄 Game Save (Sega Mega CD)

📄 FRAM Upgrade (Sega Mega CD)

📄 Region Free BIOS (Sega Mega CD)

📄 BIOS File Headers (Sega Mega CD)

📄 Schematics (Sega Mega CD 2)

📄 Board Scans (Sega Mega CD 2)

📄 FRAM Upgrade (Sega Mega CD 2)

📄 Schematics (Sega Mega Drive)

📄 Board Scans (Sega Mega Drive)

📄 Hardware Overview (Sega Mega Drive)

📄 AV Pinout (Sega Mega Drive)

📄 Audio Circuit (Sega Mega Drive)

📄 Game Cartridge Pinout (Sega Mega Drive)

📄 CXA Video Encoder (Sega Mega Drive)

📄 Jailbar Fix (Sega Mega Drive)

📄 Controller Interface (Sega Mega Drive)

📄 CleanPower USB-C (Mega Drive)

📄 AV Pinout (Sega Mega Drive 2)

📄 CleanPower USB-C (Mega Drive 2)

📄 CleanRGB Install (Mega Drive 2)

📄 Schematics (Sega Mega-Tech)

📄 Hardware Overview (Sega Mega-Tech)

📄 Boot Up Behaviour (Sega Mega-Tech Arcade)

📄 Mega Drive Overview (Sega Mega-Tech)

📄 Powering From Bench (Sega Mega-Tech)

📄 Master System Boot (Sega Mega-Tech)

📄 Mega Drive Circuit (Sega Mega-Tech)

📄 Mega Drive Boot (Sega Mega Tech)

📄 Mega Drive 68k (Sega Mega-Tech)

📄 Mega Drive Z80 (Sega Mega-Tech)

📄 Mega Drive AV Out (Sega Mega-Tech)

📄 Cartridge Pinout (Sega Mega-Tech)

📄 Reading Game Titles (Sega Mega-Tech)

📄 Mega Drive Game Load (Sega Mega-Tech)

📄 Master System Game Load (Sega Mega-Tech)

📄 Z80 Data Sharing (Sega Mega-Tech)

📄 Audio Circuit (Sega Mega-Tech)

📄 Coin Meter (Sega Mega-Tech)

📄 Button Interface (Sega Mega-Tech)

📄 Port Expander IC24 (Sega Mega-Tech)

📄 Test Mode (Sega Mega-Tech)

📄 No Game Load (Sega Mega-Tech)

📄 Hardware Overview (Sega NAOMI 2)

📄 Power Rails (Sega NAOMI 2)

📄 No Screen (Sega NAOMI 2)

📄 Black Screen (Sega NAOMI 2)

📄 Glitched Graphics (Sega NAOMI 2)

📄 Schematics (Sega Saturn)

📄 AV Pinout (Sega Saturn)

📄 Sega Saturn Minimum Boot

📄 CleanPower Install (Sega Saturn)

📄 50Hz 60Hz Switch (Sega Saturn)

📄 Audio Circuit (Sega Saturn)

📄 FRAM Upgrade (Sega Saturn)

📄 Laser Tuning (Sega Saturn)

📄 Region Free BIOS (Sega Saturn)

📄 Power Circuit (Vectrex)

📄 Screen Adjustment (Vectrex)

📄 Power Up Basics (Virtual Boy)

📄 Pupil Distance & Focus (Virtual Boy)

📄 Disassembly (Virtual Boy)

📄 Lens Ribbon Repair (Virtual Boy)

📄 Hardware Overview (Wondermega)

📄 Version Identification (Xbox Original)

📄 Power Up Basics (Xbox Original)

📄 Power / Eject Button Circuit (Xbox Original)

📄 Power Supply Pinout (Xbox Original)

📄 Power Rails v1.0 (Xbox Original)

📄 System Management Controller (Xbox Original)

📄 AV Cable (Xbox Original)

📄 DVD Drive (Xbox Original)

📄 Power Up Diagnostics (Xbox Original)

📄 Orange LED Fan Spin Off (Xbox Original)

📄 FRAG Red Green LED (Xbox Original)

📄 LED Status (Xbox Original)

📄 Error Codes (Xbox Original)

📄 EEPROM Dump (Xbox Original)

📄 HDD Replace (Xbox Original)

📄 Aladdin XT Plus2 Install (Xbox Original)

📄 New Dashboard (Xbox Original)

📄 Flashing Cerbios (Xbox Original)

📄 Flashing Titan BIOS (Xbox Original)

📄 Emulators (Xbox Original)

📄 Insignia Xbox Live (Xbox Original)

📄 Disassembly (Xbox 360 Slim)

📄 Identify Model (Xbox 360)

📄 Hard Drive Upgrade (Xbox 360)

📄 RGH 3.0 (Xbox 360)

📄 Aurora Dashboard (Xbox 360)

📄 Re-key DVD Drive (Xbox 360)

📄 Offline System Update (Xbox One)

📄 Replacing Hard Drive (Xbox One)

📄 Replacing Disc Drive (Xbox One)

📄 Schematics (Xbox One X)

📄 Standby Voltages (Xbox One X)

📄 Power On Voltages (Xbox One X)

📄 Schematics (ZX Spectrum 16/48k)

📄 Model Versions (ZX Spectrum 16/48k)

📄 Power Circuit (ZX Spectrum 16/48k)

📄 ULA (ZX Spectrum 16 48k)

📄 Z80 CPU (ZX Spectrum 16 48k)

📄 Schematics (ZX Spectrum 128)

📄 Model Versions (ZX Spectrum 128)

📄 Power Circuit (ZX Spectrum 128)

📄 40077 Gate Array (ZX Spectrum 128)

📄 Z80 CPU (ZX Spectrum 128)

🕹️ Game Development

📦 RetroSix Product Info

📄 Floppy Disk (Sticker Template)

📄 Atari Jaguar Cartridge (Sticker Template)

📄 Atari 2600 Cartridge (Sticker Template)

📄 GB Cartridge Label (Sticker Template)

📄 GBC Back Shell (Sticker Template)

📄 GBA Cartridge (Sticker Template)

📄 GBA Back Shell (Sticker Template)

📄 GBA SP Console Decal (Sticker Template)

📄 GBA SP Back Shell (Sticker Template)

📄 N64 Cartridge (Sticker Template)

📄 GB Shell (Print Template)

📄 GBP Shell (Print Template)

📄 GBC Shell (Print Design)

📄 GBA Shell (Print Template)

📄 GBA SP Shell (Print Template)

📄 Game Cube Jewel Top (Print Template)

🛠️ Send In Repair Service

💯 Prestige Shells & Consoles

📄 Will the Prestige shells fit AGS/Original screens?

📄 What finish are the Pearl series shells?

📄 What materials are finish are the Prestige shells made from?

🔋 CleanJuice Battery Upgrade

📄 What do the LEDs mean on the CleanJuice?

📄 How will I know when the battery is low?

📄 Do I need to solder or cut the CleanJuice?

📄 How long will the CleanJuice last?

🔊 CleanAmp Audio Amplifier

📄 CleanAmp, PureSilence and Dehum. What's the difference?

📄 I can hear noise after adding CleanAmp?

🏬 Ordering & Shipping

📄 Posting Repair Items (Send In Service)

📄 Can I become a distributor?

📄 Do you ship to my country?

📄 Can I track my order?

📄 How long will the delivery take?

📄 When will my order be dispatched?

📄 Where is your stock located?

Sign In / Register

Repair & Schematics / ZX Spectrum 128 / Z80 CPU (ZX Spectrum 128)

0 / 0

Z80 CPU (ZX Spectrum 128)

Updated Mar 15, 2026 · 4 min read · 0 viewing

40077 Gate Array (ZX Spectrum 128) The starting point of the system is the AMSTRAD 40077 Gate Array chip. If this chip is bad , you...

Bedrock Wiki... Made with passion by AngelSix