#Apple ii mac emulator how to#
#Apple ii mac emulator for mac#
#Apple ii mac emulator software#

ThatвЂ™s also not something that to hold against them in the least, mind you вЂ“ when you are a relatively tiny, all-volunteer group of programmers keeping the software going to maintain decadesвЂ™ worth of content from a major computing company thatвЂ™s notoriously litigious about intellectual propertyвЂ¦.some of the details are going to fall through the cracks, especially when youвЂ™re trying to cram them into a forum post, not specifically addressing the archival/information science community, etc.

#Apple ii mac emulator for mac#

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 вЂ“ but there are aspects of the technical setup process that arenвЂ™t super clear from the Emaculation guides that I first started with. Some versions of ProDOS had a sort of ROM checksum, and if the number came up wrong the OS would freeze during boot.Last fall I wrote about the collaborative technical/scholarly process of making some вЂ™90s multimedia CD-ROMs available for a Cinema Studies course on Interactive Cinema.

#Apple ii mac emulator how to#

One thing not covered by the tech notes is how to tell the difference between a real Apple II and one of the not-quite-clones, such as the Franklin Ace. ROM 0), reporting $xx1F when it should be $xx7F.Д¬ode that does all of the checks, as well as identifying the memory configuration, can be found in Miscellaneous Tech Note #2. The value in A will be slightly wrong if Y is zero (i.e. Note: In emulation or eight-bit mode, only the lower eight bits are returned. (The ROM versions are described in IIgs Tech Note #26.) Bit Accumulator X Register Y RegisterД«it 15 Reserved Reserved Machine ID NumberД«it 14 Reserved Reserved Machine ID NumberД«it 13 Reserved Reserved Machine ID NumberД«it 12 Reserved Reserved Machine ID NumberД«it 11 Reserved Reserved Machine ID NumberД«it 10 Reserved Reserved Machine ID NumberД«it 9 Reserved Reserved Machine ID NumberД«it 8 Reserved Reserved Machine ID NumberД«it 7 Reserved Reserved ROM version numberД«it 6 1 if system has memory expansion slotД«it 5 1 if system has IWM port Reserved ROM version numberД«it 4 1 if system has a built-in clock Reserved ROM version numberД«it 3 1 if system has desktop bus Reserved ROM version numberД«it 2 1 if system has SCC built-in Reserved ROM version numberД«it 1 1 if system has external slots Reserved ROM version numberД«it 0 1 if system has internal ports Reserved ROM version number The IIgs ROM version information can be determined from the contents of the A/X/Y registers set by $FE1F when the carry is clear. Future 16-bit Apple II products may match different Apple II identification bytes for compatibility reasons, so to identify a machine as a IIgs or other 16-bit Apple II, you must make the following ROM call: SEC Set carry bit (flag)Д«CS OLDMACHINE If carry is still set, then old machineД«CC NEWMACHINE If carry is clear, then new machine The ID bytes for an Apple IIgs are not listed in the table since they match those of an enhanced Apple IIe. Location $FBBE is the version byte for the Apple IIe Card (just as $FBBF is the version byte for the Apple IIc family) and is $00 for the first release of the Apple IIe Card. Location $FBDD allows you to tell the difference between the Apple IIe Card and an enhanced Apple IIe because $FBDD will always contain the value $02 on the Apple IIe Card. The Apple IIe Card for Macintosh LC uses the same identification bytes ($FBB3 and $FBC0) as an enhanced Apple IIe. Machine $FBB3 $FB1E $FBC0 $FBDD $FBBE $FBBF These bytes are in the main bank of main ROM (shadowed on the Apple IIgs), and you should make sure that this bank is switched in before making decisions based on the contents of these locations. To identify which computer of the Apple II family is executing your program, you must check the following identification bytes. The way to identify different Apple IIs is described in Apple II Miscellaneous Tech Note #7.