These two features, some cassette tape I/O routines, and a few seldom-used floating point math routines were removed in the transition from the Integer BASIC ROMs to the Apple II+ ROMs, in order to accommodate the larger size of the Applesoft BASIC interpreter. Apple II Programmer's Reference Here's a brief list of Applesoft, Integer Basic, DOS 3.3, and ProDOS commands with descriptions. I found these in the back of a manual for II in a Mac, one of the first Apple II emulators that ran on the original Mac and Mac 512. History After working on the video game hardware of Breakout with Steve Jobs at Atari in 1975 , [1] Wozniak started work on Game BASIC so he could write games in software without resorting to machine language . [4] The first program that Wozniak tested on the Apple I's BASIC interpreter was an early Star Trek text game; the source code had already been ported to HP BASIC for the HP 2000C minicomputer. Thus was born Integer BASIC, which shipped on every Apple I and II and eventually lead to Applesoft BASIC, the first computer language most people growing up … Apple Computer then turned to Microsoft to adapt their version of BASIC, which supported floating-point instructions, into Applesoft BASIC.[4]. It's entirely possible that your father had some setup of his own using for example Integer BASIC plus - or some other patched version. It was initially self published and later released by Synergistic Software. Apple Desktop (1986)(Apple)(Disk 1 of 2). [2], Apple BASIC was included directly in the ROM of the Apple II computer, released in 1977. Integer BASIC was the first version of BASIC available for the Apple II series of computers. From all Apple IIs at the Basic (either Applesoft or Integer) prompt, "CALL -151" will enter the monitor. [2] Wozniak designed the Apple I around this implementation of BASIC,[3] but was unable to afford a compiler at the time, so he hand assembled the instructions which he coded directly into machine language for the MOS 6502 processor. Dr. Galfo's Integer BASIC Compiler for the Apple II This is an Integer BASIC Compiler that was developed in the early 80's by Dr. Chris Galfo. After all, much can be done. These ROMs also included an interpreter for a 16-bit bytecode language, called Sweet16, which was very simple, compact and worthy of study. It is named Integer BASIC because it did not have any floating point capabilities and worked only with signed 16-bit integers. The IIc was an attempt at a 'portable' Apple II and supported all the graphics modes of the IIe plus "mousetext" graphics, which the IIe didn't until the //e. Integer BASIC, also called Apple BASIC, was an early BASIC interpreter created by Steve Wozniak for the Apple I computer and the original release of the Apple II computer. A cassette containing Apple BASIC for the Apple I computer. [5], Preliminary Apple BASIC users manual, October 1976, In 1976, Apple BASIC was provided to Apple I owners on a cassette tape that took about 30 seconds to load. [2] As games at the time mainly relied on integer functions, he implemented a small virtual machine called "Sweet 16" to support 16-bit integers. For example, when V is 40, the number of valid binary bits is 6 (decimal 40 is 101000 in binary format). The command line symbol for Integer Basic was a right-facing arrow ( > ). This was of course far easier than looking up the corresponding opcodes in machine language and typing those in. The only differences really between the II and the II+ was the II was equipped with Integer Basic instead of Applesoft in ROM. Revision 1 added the color-killer circuit which removed the color fringes from text. In 1977, Steven Wozniak wrote a basic interpreter for the Apple Computer in his hotel room. Integer Basic. Apple II Programmer's Reference Here's a brief list of Applesoft , Integer Basic , DOS 3.3 , and ProDOS commands with descriptions.

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