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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Apple II: Single Step in Monitor | Applefritter

Posted by jpluimers on 2026/02/10

I need to check out which ROM my Apple //e and //c have as per [Wayback/Archive] Single Step in Monitor | Applefritter comment by [Wayback/Archive] jeffmazur | Applefritter:

Depends upon which machine and ROM version you have.

The original Apple II monitor does have an S command to single step code in the Monitor. That was removed however to add other features and was not restored until ROM00 of the //c. There are however various 3rd-party ROM images that also have the Step and Trace commands, for example ROMeX and ROM4X, APPLEII.EDM, etc.

There are also hardware boards available to do this as well

Links

ROMX/ROMX+/ROMXc/ROMXc+/ROMXe

ROM4X/ROM5X

Apple II EDM

Queries

--jeroen

[Wayback/Archive] Review: ROMXe by JD Micro – More ROMS than you can shake a joystick at! – YouTube

This entry was posted on 2026/02/10 at 18:00 and is filed under //e, 6502, Apple, Apple ][, History, Power User, Retrocomputing. Tagged: . You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

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