![]() See screen 5, for example.ĭistribution permitted under the terms of the GNU Public License. The DR1 command will cause them to be numbered from 0. If this fileĬontains Forth screens, they will be numbered from OFFSET (100 byĭefault). Open the file whose full or partial pathname follows. ![]() Zero page locations 0, 1 and 2, respectively.Ĭlose the file identified by the reference number in byte 2 of CLIST. 250 Inside the Apple The Art of the Works Progress Administration. ^e - toggle editing between insert and overwrite mode.Ĭut, copy, paste and replace work between screens, too.Ī few new words words were added to the basic FIG Forth vocabulary:Įnter the machine language monitor control-Y resumes ProForth.Ĭall the ProDOS MLI with parameter list at addr and command n1 n2 isĬall machine language program at address addr A, X and Y are passed in and as World War II loomed, the size of the audiences in Harlem began to shrink. ^r - replace the current line with the one in the buffer. ^v - paste the buffer before the current line, moving other lines down. ^c - copy the current line to the buffer. ^x - cut the curent line to the buffer, moving other lines up. ^y - deletes everything to the end of the line. ^d - delete the character under the cursor. It also puts the word Shrinkit or BinaryII in the file type column as. ^i - (tab) brings up the next screen for editing.ĭel - delete the character to the left of the cursor. This tells your web browser to recognize Shrinkit and Binary II files as binary. Here's a summary of the editor's commands (^ means a control key):Īrrow keys move the cursor typing enters text. On starting, the editor displays block one. To edit this file, run the program F.EDIT from your program selector. ProForth stores data on disk in a series of 1024 byte screens in the file F.DISK. The bye command exits ProForth and returns to your program selector. The command 6 load will save the new dictionary, overwriting your existing copy. Once they are loaded, the commands to save the newly extended dictionary to disk are on screen six. For example, "1 load" adds words to save the dictionary to disk. To load code and make it part of the ProForth dictionary, use the command n load, where n is the screen you want to load. The GEM (Generous Efforts of Many) Project is a compilation of software for the Apple // and IIGS. Screen seven has a familar Hello, world program. Screens four and five hold system messages. For example, the command 1 list will list the code on screen one, etc. You can examine the sample code using the list command. The vlist command will print a short summary of known words. Review the glossary to see the words in this version. Here's a few tips to get started.Ĭheck out Leo Brodie's book Starting Forth, cited below. Press return, and you should see an OK prompt. To explore the language, just boot the ProForth disk or run F.SYSTEM from your favorite program selector. ProForth was adapted for ProDOS from FIG Forth in the mid-eighties. (Prontodos or EsDOS are faster and probably okay but, I do not know for certain.) Einstein does permit creation of global variables for use by several program modules. If you regularly work with PDF files, ShrinkIt is a great utility to keep around to keep your PDFs slim without affecting their readability or image quality.Download an Apple II disk image of ProForth (.tgz).ĭownload the ProForth disk image as a ShrinkIt disk archive (.sdk). The Einstein compiler requires an Apple II with at least 48k RAM and Applesoft in ROM (or available via a RAM card or ROM card). In fact, for some PDFs that include lots of bitmap content, the resulting file can actually be larger than the original-sometimes significantly so.) ![]() (The procedure works best on vector PDFs with lots of extraneous data, so ShrinkIt won’t provide significant file-size reduction for every PDF. In my testing, ShrinkIt was able to reduce the file size of PDFs containing a combination of text and images by as much as 35 percent, although I’ve seen reports of shrinkage of up to 95 percent for files that contain mostly vector images. The resulting batch of files was 25 percent smaller: 16.3MB compared to the original 21.7MB. You just drop one or more PDFs onto the ShrinkIt icon, or into the ShrinkIt window, and in a few seconds you’ll have smaller versions of those files, saved in the same location as the originals each original is renamed with org at the beginning of its name.Īs an example of ShrinkIt’s effectiveness, I dropped 13 InDesign-created PDFs-each of which was saved with InDesign’s extra options disabled, so the files should have already been as small as possible-onto ShrinkIt. The result is ShrinkIt, a simple, free utility that uses OS X’s PDF capabilities to quickly shrink PDF files.
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