Silk Worm Arcade PCB Upgrades for Original Tecmo Z80 Hardware
Research the HighScoreSaves Silk Worm upgrade for compatible original Tecmo arcade hardware. This kit is specifically designed for an original Silk Worm PCB and installs at the documented Z80 processor location while retaining the original game board as the operating arcade platform.
The original compatible Z80 processor may be removed from the PCB and installed on the HighScoreSaves daughter card, or a compatible replacement Z80 may be selected when ordering. The completed daughter card is then installed into the original CPU socket.
This is an original-PCB upgrade rather than a replacement JAMMA board, reproduction PCB, generic multicade, or software-emulation platform.
Silk Worm Free Play and High Score Save Kit Installation Guide
Before ordering, verify that your cabinet contains a compatible original Silk Worm PCB and confirm the Z80 processor and socket configuration shown in the installation guide. The existing board should be fully working before the upgrade is installed.
Silk Worm Z80 and PCB Compatibility
The HighScoreSaves daughter card installs at the original Z80 CPU location. The installation guide specifically identifies this kit as compatible only with a Silk Worm PCB and requires a compatible Z80 processor on the daughter card.
- Designed specifically for compatible original Tecmo Silk Worm arcade hardware
- Requires a compatible Z80 processor
- Existing compatible Z80 may be transferred to the daughter card
- Requires a suitable socketed Z80 CPU location for daughter-card installation
- Correct Z80 Pin 1 orientation must be verified before power is restored
HighScoreSaves designs and supports Silk Worm upgrades for compatible original Tecmo arcade PCBs using Z80 processor hardware.
Understanding the Silk Worm Original PCB Upgrade
The Silk Worm kit adds supported upgrade functionality while continuing to use the compatible original Tecmo game PCB. The HighScoreSaves daughter card interfaces through the existing Z80 processor location rather than replacing the complete arcade board.
Correct identification of the actual PCB is important because vintage cabinets may have been converted, repaired, or fitted with replacement hardware during decades of service. Cabinet artwork alone should not be used to determine kit compatibility.
Silk Worm Z80 Processor and Daughter-Card Installation
Installation begins by locating the original Z80 processor socket on the Silk Worm PCB. The existing compatible Z80 may be carefully removed from the board and installed onto the HighScoreSaves daughter card.
The assembled daughter card is then installed into the original Z80 socket. Correct Pin 1 orientation must be confirmed before applying power.
Daughter-Card Clearance and Program ROMs
After installing the daughter card, inspect it from multiple angles and confirm that every pin is correctly seated. The installation guide also instructs installers to verify that no original PCB component is contacting the underside of the new daughter card.
The Silk Worm kit includes ROM Saver functionality. The documented program ROMs may optionally be removed after the kit is installed. Follow the installation guide carefully and remove only the program ROMs identified for this purpose.
Original Tecmo PCB vs. Replacement Hardware
The HighScoreSaves upgrade keeps the compatible original Silk Worm PCB as the underlying game platform. It does not replace the machine with a generic multicade, replacement JAMMA board, reproduction PCB, or software-emulation system.
Why Keep the Original Silk Worm PCB?
- Retains compatible original Tecmo arcade hardware in the cabinet
- Keeps the original Silk Worm PCB as the operating game platform
- Continues using the original Z80-based hardware architecture
- Adds supported functionality through a removable daughter-card upgrade
- Avoids replacing the original game hardware with a generic multicade or emulation platform
What to Check Before Ordering the Silk Worm Kit
Inspect the actual board before ordering and confirm that the hardware matches the documented Silk Worm configuration.
- Confirm that the cabinet contains a compatible original Silk Worm PCB
- Verify that the game board is fully working before installation
- Locate the original Z80 processor and CPU socket
- Confirm that a compatible Z80 is present or select a replacement when ordering
- Inspect the processor pins and original CPU socket for damage or previous repair work
- Verify correct Z80 Pin 1 orientation and daughter-card clearance before applying power
- Review the Silk Worm Installation Guide before ordering or beginning installation.
After confirming compatible original Silk Worm hardware, visit the Silk Worm Free Play and High Score Save Kit product page for current pricing, Top 10 score saving with initials, Free Play, lives-based score tables, God Mode, Flip Screen, attract sounds, Standard and Wi-Fi options, configuration choices, and ordering.