In particular, while each Mac emulator has some pretty good information available to troubleshoot it (if you’ve got the time to find it), I’ve never found a really satisfying overview, that is, an explanation of why you might choose X program over Y. That’s also not something that to hold against them in the least, mind you – when you are a relatively tiny, all-volunteer group of programmers keeping the software going to maintain decades’ worth of content from a major computing company that’s notoriously litigious about intellectual property….some of the details are going to fall through the cracks, especially when you’re trying to cram them into a forum post, not specifically addressing the archival/information science community, etc. The tinkering enthusiast communities that come up with emulators for Mac systems, in particular, are not always the clearest about self-documentation (the free-level versions of PC-emulating enterprise software like VirtualBox or VMWare are, unsurprisingly, more self-describing). I elided much of the technical process of setting up a legacy operating system environment in an emulator, since my focus for that post was on general strategy and assessment – but there are aspects of the technical setup process that aren’t super clear from the Emaculation guides that I first started with.
Closing the debuggerĮntering G by itself tells the interface to resume the current process at the default location - which closes the debugger.Įntering G followed by any incorrect string such as G FINDER will terminate the current running process and also close the debugger window.įor more information and an interesting read, see Apple's Technical Note about MicroBug.Last fall I wrote about the collaborative technical/scholarly process of making some ’90s multimedia CD-ROMs available for a Cinema Studies course on Interactive Cinema. Example: The command ES (Exit to shell) can be run if the computer crashes, and in some cases can bring you out of the crashed state. This adds commands which can be more useful to developers. MicroBug can be extended by installing MacsBugs ( Motorola Advanced Computer System De buger). The 'G' command followed by an instruction tells the interface to begin executing the given instructions at this offset.įor example, you could enter G $0C30 to look up the the memory contents at the given address.Įntering G followed by a string looks for the represented address within the current running process/program. It can also be triggered by pressing the 'Programmer's Button' on a desktop Mac, usually located beside the reset button. The debugger window can be triggered by pressing the command + power key combination on PowerBooks/portable Macs. MicroBug is a debugging interface that allows you to access details of whatever is currently running on the CPU, or a given memory location.
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