" allows you to open and mount a new disk image file even if Gus has already started runnint. All other sizes show up in slot 5, up to a maximum of 16 devices. ***) Note: 140K disks show up in slot 6 (but there is currently no support for writing to slot 6 disks, so creating a blank one is not too useful). A future Gus will probably pre-format it as ProDOS unless you hold down the Option key. (***In l.od2, the new image is completely blank. If you're in the GS Finder, it will prompt you to format the new disk. The new disk image is immediately available to the Apple llgs. Radio buttons are used for common disk image sizes, or just type a size you would like to create. " allows you to create an empty disk image file. What do you think?***) The Gus "File" Menu New Disk Image. Maybe there is a better (default) modifier combination to use. Maybe we will have to provide a configuration dialog to choose what modifier keys allow access to the Macintosh menus. (*** Note: This is a problem if there are GS applications that need to see Command-Shift- keystrokes. This is only necessary when the Apple ITGS window is in the front and not paused. This was necessary because many Apple IT and ITGS programs expect to receive key sequences such as "Command-Q". For instance, to use the QuitJllenu item instead of typing Command-Q, you need to type Command-Shift-Q. To use a Command key for a menu item, combine the Command key with the Shift key. Gus Menu Items * Even though menu items have Command-key ( ) equivalents, when Gus is running all keystrokes are routed to the emulator. You can have up to 14 Megs of RAM in the GS. "Get Info" on the Gus application icon and crank it up. Apple IIGS Memory Size The Apple ITGS memory size is determined by the size of the Gus application size. The Gus window works across multiple monitors and in any screen depth, although you will get the best performance in 256-color mode with the window entirely on a 256-color screen.
Gus runs in a standard Macintosh window and is System 7 -savvy as you would expect of any Macintosh application. Just put the disk image file in the same folder as Gus, launch Gus and you're booting. Gus boots from Disk Copy "disk images" or Apple IT Shrinklt-compressed "disk images". Most of the graphics modes perform extremely fast updates that is, most graphics on Gus are substantially faster than the Apple lle card. The color graphics modes for Hi-Res and Double Hi-Res are rendered using color-bleeding and match the output provided by the Apple lie card for the Macintosh LC. As for video modes, we provide: 40 column and 80 column text with all the appropriate background and text colors, Hi-Res in both B&W or Color, Double Hi-Res in both B&W or Color, Lo-Res, Double Lo-Res, Super Hi-Res 320, Super Hi-Res 640, all the "mixed" graphics and text modes, and even Super Hi-Res fill-mode. There is also a simple architecture to allow us to accelerate portions of the GS ROM should we find this necessary we have only needed to accelerate some absolutely key areas, such as IIGS Toolbox dispatching. What works? We have written hardware emulations for all 13 available video modes, the Apple II memory system, the Apple Desktop Bus (ADB) KeyMicro, single-bit "Classic" Apple IT sound, the Joystick, the clock, and theiwm disk "'9!1fdware.Ģ We also implement 'some "patches" to the image of the Apple IIGS ROM 03 image which allows us to do things like boot from an Apple "Disk Copy" disk image. You can create disk image files from existing 800K or 1.4 MB disks using Apple's "Disk Copy" utility. Launch Gus by double-clicking or by dropping the disk image onto Gus. Quidstart Put Gus artd a bootable disk image file into the same folder.
Gus has also been specially tuned to provide accelerated performance when run on any Power Macintosh. Gus is a Macintosh application which emulates the microprocessor, displays, sound generation and other hardware found in an Apple IIGS. 1 Gus The Apple IIGS Emulator for Macintosh 20 July 1996 "Gus" is the name Apple Engineers Dave Lyons, Jim Murphy, and Steve Stephenson gave to their Apple IIGS's when they first bought them in 1986 and So, we thought it was a fitting name for an Apple IIGS emulator.
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