Full CPU bus visibility
Routes MOS 6502 socket signals from the target Apple II system into the LogicAnalyzer capture setup.
Apple II bus diagnostics
a2‑6502 Logic Analyzer Adapter
Socket-level adapter for capturing MOS 6502 CPU signals on Apple II systems. It maps CPU pins to a pair of LogicAnalyzer boards and exposes an additional 16-signal header for wider system correlation.
What this adapter does
Dual-analyzer mapping
Pin/channel mapping is designed for two Dr Gusman LogicAnalyzer boards as used in this deployment.
16 extra capture points
Expansion header allows additional probes beyond CPU pins so you can correlate events across the board.
Compatibility
System fit
Designed for Apple IIc and works in Apple IIe. Apple II / II+ operation is possible with additional spacers.
Analyzer requirement
This product does not include the analyzer boards. Two Dr Gusman LogicAnalyzer units are required. You can source boards from direct orders or the PCBWay shared project.
Software and profiles
The adapter hardware project is hosted on its official Ositis repository. Capture software comes from Dr Gusman’s LogicAnalyzer project, and this adapter should be used with the 6.5 beta line to import adapter profile/port assignments.
Install notes
Before installation
Power down and discharge the system. Confirm CPU orientation and ensure enough vertical clearance for wiring.
Board placement
Seat the adapter into the CPU socket, then connect both LogicAnalyzer boards according to your signal map.
Additional probes
Use the 16-signal expansion header with fly-wires to observe subsystem signals tied to the event under test.
Software setup
Install Dr Gusman LogicAnalyzer 6.5 beta and import the adapter profile/port assignment for consistent channels.
Validation capture
Start with a simple boot capture to verify channel polarity, clock stability, and trigger behavior.
Scope of product
Adapter board only; analyzer hardware and optional fly-wire kits are separate purchase items.
FAQ
Is this a complete analyzer kit?
No. You need two Dr Gusman LogicAnalyzer boards in addition to this adapter.
Which software version should I use?
Use the 6.5 beta/release line for profile support with this adapter. See linked discussion and project updates.
Does it work on Apple IIe?
Yes. It also works on Apple II/II+ with extra spacers; board geometry and slot clearance should be checked first.
Can I capture non-CPU signals?
Yes, via the extra 16-signal expansion header and fly-wire probing.
Where do I buy the LogicAnalyzer boards?
You can source them from logicanalyzer.rf.gd or via the PCBWay shared project.