The Emulator

Pictures

• Data can be loaded in memory range A000h-AFFFh. Other ROM areas cannot be overwritten anymore.
• A bugfix: The AND absolute command now also does I/O operations.
• Another bugfix: Sometimes files misteriously disappeared and reappeared or could not be imported. Simply by resetting the internal error flag (used for checking I/O operations by Turbo Pascal) prior to opening files, this problem now seems to have dis appeared.
• Yet another bugfix: Loading of the extension ROM, specified in the .INI-file didn't work. It should be OK now.
• Hotkeys changed.

• Partial implementation of undocumented PPIA port D at B003h.
• Optional disassembly of illegal opcodes in desktop monitor.

• Error in v1.21 fixed: Memory 0000h-9FFFh RAM and C000h-FFFFh protected against overwriting by loading.
• On some computers the monitor would go into Stand-by mode as soon as the emulator was started. With help from Jens-Vagner Andersen of Denmark, this problem could be solved.

• *CAT command ROM-trapped.
• Debugging options expanded. Up to four independent "real" breakpoints can be set at a time. Special keys ([F4], [F5], [F6], [F12], [Shift+F12] and [Ctrl+F12]) now can also be used when in debug mode.
• Parallel memory boxes at A000h. Up to 8 EPROMs can be used at the same time. Automatic smart-switching included. Manual switching through I/O-port at BFFFh.
  It is now no longer possible to overwrite the memory area at A000h-AFFFh by loading.
• The FIN, FOUT, GET, BGET and FGET functions and the SGET, PUT, BPUT, FPUT and SPUT statements have been implemented.
• MS-DOS shell available (Temporarily go to MS-DOS).
• Output to printer implemented.

• Screen capture to .BMP file.
• Mouse support implemented.
• Floppy Disk Controller 8271 and DOS implemented.
• Disk screen in emulator desktop added.
• Maximum number of parallel toolboxes at A000h expanded to sixteen.

• Sound output through PC-speaker improved,
• 65C02 emulation in stead of 6502,
• Seven extra 65802 instructions, one of which gives access to the second accumulator,
• Boot from disk image in drive 0, by pressing [Alt+F12] simultaneously,
• Alternative Floating Point ROM with 80x87 co-processor support (c) by Leendert Bijnagte.

• Communication capabilities expanded. The Atom's I/O ports at B400h-B7FFh have now beenlinked to the PC's I/O ports 0000h-03FFh, for communication between emulator and other devicesand/or programs.

• Leendert Bijnagte, who sent me a lot of software and supported me with b-testing. He is also the programmer of the new FP-ROM with 80x87 support.
• Graham Fowler.
• Friso de Haan.
• Henk van der Heijden, who gave me an Atom, a BBC and an Electron. Due to his encouraging comments, the Atom DOS is now supported in the emulator.
• Menno Lauwerens, who gave his own home-built Atom away to me (which really put my attention to implementing the parallel toolboxes at A000h). It's a beauty, with two disk drives, a self-made monitor and a transformer, bought from IBM for 25 cen ts per kilo. The disks contained quite a lot of software, including some nice programs by Menno himself, like Moon Patrol, Pengo...
• Roland Leurs, creater of the Atom-in-PC, who sent me "Gokkast", and who gave me a lot of feedback.
• Magnus Olsson, who gave me feedback and came up with a lot of good ideas.
• Steve Webster (It took me some time, but the TapeCat utility has been born!)
• Phil Mainwaring, Jens-Vagner Andersen and everybody else, who came up with comments, questions, ideas etc. to help me fix bugs and expand the emulator. Just keep on sending it...