Commodore PET 2001 Series

Commodore PET 2001 by Commodore International / Commodore Business Machines (CBM), 1977-1979.
Emulation based on an original Commodore PET 2001 emulation by © 2014 Thomas Skibo (all rights reserved, redistribution permitted; here used with kind permission). Meanwhile, most parts of the emulator have been rewritten or replaced by alternative solutions. The I/O and IEEE implementation is still much Tom Skibo's code.
CPU, audio & CRT emulation, keyboard implementation, file, disk and tape image handling, BASIC & 6502 assembler & disassembler, utilities and enhanced interface by Norbert Landsteiner (mass:werk), 2017–2023,
PET keyboard image (SVG, rerendered to PNG by me) by Lovelac7, 2008, Wikimedia / Creative Commons. Image of PET 2001 computer (edited) by Tomislav Medak, 2009, Creative Commons.

Running Files:
You may run programs by simply dragging and dropping files onto the virtual screen of the emulator.
Supported file formats are:

Binary files will be run automatically (hold SHIFT to override), while BASIC source files are just loaded in order to allow for an inspection of the generated BASIC program. (BASIC source files may be both in lower and upper case, case is evaluated on a per-word basis. While common Unicode substitutes for non-alphabetic PETSCII characters should work, best use "chr$()" or the special PETSCII escapes instead.)
You may also provide a BASIC source text as URL-Data. Simply export a link for you program using the option “BASIC Program As URL” from the Utils/Export menu.
For best gaming experiences set the keyboard to "Games"-mode (accurate keyboard emulation without simulated key repeat) from the pop-up menu at the bottom of the virtual screen.

Directories are fully emulated for disk images and tape archives (emulated as disks in drive 8), including LOAD (and DLOAD) commands and directory listings from BASIC, wildcards and type selectors. Please mind that the emulated IEEE interface currently doesn’t support advanced BASIC 4.0 disk commands. (E.g., please use the traditional “LOAD "$",8” instead of “DIRECTORY”.)

Installing Option ROMs:
Similarly to loading files, you may also install option ROMs or overwrite installed ROMs by dragging and dropping a binary ROM-image (with file extension “.bin” or “.rom”) or using the mount dialog.
Only a single ROM image can be installed at once and you will have to provide either a start address (in hex) or a ROM socket designator (“Hn”, “Dn”, “UDn”). To install multiple ROMs, pause the emulator first. Any installed ROMs are reset and lost, when changing the ROM configuration (using the ROM-menu).

Note: Of the original PET 2001s, only the PET 2001N (the later model with the “real” keyboard) came with sockets for option ROMs. So there will be no option ROMs for the orignal ROM 1.0 configuration and you’ll probably need ROM 4.0.

Tip of the Day:
Have a look at the emulated screen’s context menu for some quick screen and editing options.

Configurable joystick to PET keyboard custom key mappings.
Business keyboard with BASIC 2.0 and BASIC 4.0 with “ROM 2b” and “ROM 4b”, respectively.
Please mind that RUN/STOP is ALT+ESC with the business keyboard, since this features an ESC key of its own.

Some Notable Features:

Many thanks to Jason Cook for beta testing version 2.0 and helpful discussions!

See here for some games (with hotlinks to load them into the emulator) and PET 2001 manuals.