Turbo Vision 4 BASIC (TV4B) is an own developed BASIC interpreter with unique properties!
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It shows similarity with the Commodore Plus/4 computer, such as MONITOR... (256 segments, one segment is 64KiB)
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...or DISASSEMBLER... (binary code of instructions are the same)
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...what's more the syntax of BASIC is devilish similar to the big ancestor.
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Wherein it substantially different from the most interpreter is that you can move, rotate the screen in the 3 dimension how you want... (SHIFT or CTRL and cursors (+HOME: default))
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It uses 3 different graphic screens. One of them looks nostalgically back to the root with its bit/pixel methode...
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You can give the colors of the foreground and background with block of 8x8 on the screen consists of 320 coloumns and 200 rows.
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The another one of them is only different from the first that it is byte/pixel...
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...enables to show 256 different colors...
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You can move the screen freely in 3D while running a program of course.
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The third graphic screen was born in a later development...
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...4byte/pixel... (32bit color depth)
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...TrueColor... (Red Green Blue Alpha)
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The next big challange was drawing the graphical element...
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...then drawing a polygon and turning a given angle...
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The another advantage of TV4B is that the education of programming will become more easily, because fantasies of pupils are moved by some line code making something spectacular!
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You can write a program to use a separate screen. One is a text screen, the other is graphic screen...
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...BUT the screen is separated in myriad way according to where you want to input datas from the user and where you want to draw...
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...getting more information about it, have a closer look at the address of 0x0083 in the zero segment of memory... (Memory.txt)
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My first BASIC game in my first BASIC interpreter is a torpedo...
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...ask for X and Y coordinates from the user. In the case of hit the target it fill the given area with red color and make a sound...
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...and this was a little presentation of abilities of TV4B! If you want to know more, see the memorymap, the history of the program. Demo example codes enclosed by interpreter make the motivation!
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