LN-006
Technical Note
C64 Interface Architecture
HollowCore establishes the electrical direction for connecting a Commodore 64 User Port to a Raspberry Pi Pico and modern storage.
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Project record // 003
HollowCore
Modern hardware interface for the Commodore 64.
Project notes
Overview
A hardware interface connecting the Commodore 64 User Port to modern microcontroller and storage hardware while respecting the electrical constraints of the original machine.
Engineering record
Project highlights
- Commodore 64 User Port interface
- Raspberry Pi Pico controller
- SD-based modern storage
- Bidirectional voltage-level translation
- Power protection and isolation engineering
Development record
Project milestones
Recorded stages only. No invented completion percentages.
- M01
Interface architecture
Define the Commodore 64 User Port to Raspberry Pi Pico architecture.
Complete - M02
Level translation
Select the SN74LVC244A and SN74HCT244 interface strategy.
Complete - M03
Electrical design
Continue power protection, isolation, and interface development.
Current - M04
Prototype validation
Build and validate the electrical interface against real C64 hardware.
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Visual record
Project media
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Repository
Source repository
Engineering documentation, architecture decisions, and development files.