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- Sinclair ZX81 Emulator V2.1
- ===========================
-
- This is an emulator program for the legendary Sinclair ZX81 homecomputer of
- the year 1981. It should work on all Atari computers of the ST(E)/TT series.
- The emulator needs no hardware support, nevertheless nearly everything works
- and looks like on the original ZX81. The ZX81 Emulator ist Public Domain. If
- you are a commercial PD dealer, please report to the author. Also note, that
- no guarantee is given that all parts of the ZX81 ROM Software and the ZX81
- programs may be copied freely. My address:
-
- Christoph Zwerschke
- Am Steinfeld 4, D-59379 Selm-Cappenberg, Germany
-
- The ZX81 Emulator should come along with the following files:
-
- ZX81.PRG ZX81 Emulator program
- ZX81.TXT german documentation
- READ_ME.TXT text you are reading now
- 3D_LABYR.81 3D labyrinth game
- ASSDEMO1.81 assembler demo program 1
- ASSDEMO2.81 assembler demo program 2
- ASSEBLE.81 Z80 assembler
- DISASSEM.81 Z80 disassembler
- GALACTIC.81 "Scramble" game
- KONG.81 "Crazy Kong" game
- STUFFDEM.81 tool-kit demo
- ZX_GT.81 BASIC compiler
- ZX_STUFF.81 BASIC tool-kit
-
- Files with the extension ".81" are ZX81 programs. There may be many more of
- them, but you should copy at least the above specified programs.
-
- The emulator has two "hot keys". The first one is the "Undo" key, which opens
- the emulator control box. In this dialog box, you can change the ZX81 parame-
- ters and do some more control operations. If you like, you can also load and
- save the parameters to existing ZX81 programs. The programs thus are always
- coupled to the suitable emulator parameters. The ZX81 program files stay ZX81
- compatible. You can also load and save ZX81 memory blocks. A change of the
- ZX81 RAM extension will become valid not before the next ZX81 reset. If you
- reset the ZX81, the parameters "ZX81.INF" and then the memory block "ZX81.MEM"
- will be loaded automatically, if they exist.
-
- The second "hot key" is the "Help" key. It shows you the layout of the ZX81
- keyboard. The Atari keyboard has the same layout in the ZX81 Emulator. You can
- use the normal Atari keyboard layout, if you press "Alternate" together with
- the keys. You can also lock and unlock this Atari keyboard mode with the
- "CapsLock" key, which has no other function in the emulator because the ZX81
- only knows capital letters.
-
- ZX81 programs are loaded and saved in the usual ZX81 way with the ZX BASIC
- commands LOAD and SAVE. Instead of the ZX81 cassette interface the actual
- GEMDOS file path is used. If you type in an empty program name, you can choose
- a name using the file select box of the Atari GEM.
-
- Share and enjoy!
-
- Christoph Zwerschke June 18, 1993
-
-