Microsoft BASIC for the 6502, running in your browser.
Click the screen to type. Enter sends a line, Backspace erases, Esc is the STOP key.
Programs you SAVE "NAME" are kept in this browser. Download a copy to keep it safe: .BAS is the program as text, to read or change in any editor; .PRG is the program file itself. Upload either one to bring a program in (a .TXT file of numbered BASIC lines works too).
SAVE "NAME"
.BAS
.PRG
.TXT
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Assembly sources you Save in the Workbench are kept in this browser. Download a copy as a .ASM file to keep it safe, or upload one to bring it back.
.ASM
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A free LearnSCADA account keeps your programs, so they are here next time.
Everything else stays free with no account: BASIC, the Machine Code Workbench and the Fieldbus tab. Your program comes with you: after you join or sign in, it is saved here for you.
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LearnSCADA 6502 BASIC Emulator. Includes Microsoft BASIC for 6502, Version 1.1, Copyright (c) Microsoft Corporation, MIT License.
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The screen uses DejaVu Sans Mono Bold (font license). The CPU, machine, KERNAL, assembler and workbench are original LearnSCADA code.