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zxsp – the Sinclair ZX Home Computers Simulator

zxsp is a simulator for the historic Sinclair ZX home computer family for Mac OS X. The current version only supports Intel-Macs. Versions for Mac OS Classic, PowerPC and old versions of Mac OS X are available from the Old versions/ directory.

zxsp simulates the black&white models ZX80 and ZX81, the Jupiter Ace, the ZX Spectrum models with 16K and 48K ram, the Spanish clone from Inves, the +128, +2, the +2A/+2B and the +3 including the Spanish and French localised versions, the Portuguese TC2048 and the TS2068-based machines TS2068 (USA), TC2068 (Portugal) and unipolbrit 2086 (Poland). If you still own one of the emulated machines and find that the simulation does not match the original, you are welcome to contact me for further improvement. Just keep the original thing ready for testing. :-)

zxsp can load from and save to a built-in virtual tape recorder or a real-world cassette recorder or a real-world computer. It also can dup real-world cassette tapes to ".tap" and ".tzx" files or vice versa.

zxsp supports ".sna", ".z80" and ".ace" snapshot files, ".tap", ".tzx", ".80", ".81", ".o", ".p", ".wav", ".aiff" tape files, ".dsk" disc files, ".dck" TCC dock files, ".img", ".dmg", ".iso" and ".hdf" hard disc images, ".scr" and ".gif" animated screenshots, excellent sound, precise screen and border effects, joysticks, a virtual tape recorder and virtual keyboards.

zxsp comes with a debugger with register edit for the main chips and various memory display modes, a video beam position indicator, single stepper and memory disassembly. The machine can be throttled down to 1 Hz or overdrived to 20 MHz cpu clock. You can directly load Z80 assembler sources into zxsp or you can use zasm for assembling. The built-in assembler is a spawn of zxsp, so you may want to look into the zasm documentation anyway.

Runs on ...

zxsp runs on Intel Macs with Mac OS X 10.6 (Snow Leopard) and above. Reportedly it also runs well on M1 ARM based Macs with Mac OS 13.1 (Ventura) under emulation. Here you find snapshots of the current state of development. Scroll to the end of this page to find the downloads. Versions for Mac OS Classic, PowerPC and old versions of Mac OS X are available from the Old versions/ directory.

Feature Summary

as of 2023-02-16 for version 0.8.30 beta

Supported machines:

• ZX80, ZX81 and Jupiter Ace
  
• TS1000 and TS1500
  
• Brazilian TK85
  
• ZX Spectrum 16k, 48k issue 2 and 3, 128k, +2, +2A and +3
  
• Spanish Inves ZX Spectrum+ and Spanish Sinclair ZX Spectrum+ 128K, +2, +2A and +3
  
• French +2
  
• Brazilian TK90X and TK95
  
• Portuguese TC2048 and TC2068
  
• US American TS2068 and Polish unipolbrit 2086

Features:

• Multiple instances
  
• Screen zoom factor x1 to x4
  
• Fullscreen mode
  
• Excellent stereo sound
  
• Precise screen and border effects
  
• Virtual tape recorder and keyboards
  
• Save highres and flashing Gif screenshots and record Gif movies
  
• Sound effects
  
• Convert between tape file formats

Supported file formats:

• Load .sna, .z80, .ace, .tap, .80, .81, .o, .p, .tzx, .rzx, .wav, .aiff, .dsk, .dck, .img, .dmg, .hdf, .iso, .rom, .ass and .scr files
  
• Save .sna, .z80, .ace, .tap, .80, .81, .o, .p, .tzx, .rzx, .dsk, .img, .dmg, .hdf, .rom, .scr and .gif files
  
• All tape files can be instant-loaded (if using the rom routines)
  
• Load .sna, .z80, .ace, .tap, .o, .p, .80, .81, .rom files from assembler source
  
• record and play audio files.

Supported real-world machinery:

• Load from and save to real-world Specci or cassette recorder
  
• USB joysticks and game pads

Supported virtual peripherals:

• Several joystick interfaces
  
• Sinclair Interface 2 for joysticks and rom cartridge
  
• Kempston mouse interface
  
• Several audio add-ons
  
• Several ram extensions
  
• SPECTRA video interface
  
• Timex Sinclair 2020 tape recorder
  
• Lenslok
  
• DivIDE Compact Flash and IDE Hard Disk interface
  
• Currah µSpeech
  
• Romantic Robots Multiface ONE, 128 and +3

Integrated debugger:

• Speed control from 1 Hz to 20 MHz
  
• Load assembler and C source (see zasm for details)
  
• Z80, Ula/CRTC/MMU and AY sound chip register edit
  
• Single stepper
  
• Misc. memory views incl. disassembly
  
• Breakpoints for exec, read or write access
  
• Video beam position indicator

What's new

2015-05-18: Version 0.8.0.pre27: Emulation of Romantic Robots' Multiface ONE, 128 and +3
2018-2022 : Version 0.8.0.pre28: Play & record .rzx files. Improved Currah µSpeech accuracy.
2023-02-16: Version 0.8.28 beta: Perfect ZX80 & ZX81 timing and video emulation.
2023-03-02: Version 0.8.29 beta: First public release after 8 years
2023-03-07: Version 0.8.32 beta: fixed crash at start when in and out audio sample frequencies didn't match
2023-03-11: Version 0.8.33 beta: internal refactoring, some fixes

Please note: Version 0.8.28 beta and later now have some bugs. If you need a stable version please stick to 0.8.0pre27. Please report bugs at zxsp/issues.

Git Repository

github.com/Megatokio/zxsp

The Old Blog

Blog at blogspot.com

The Files:

	Name		Letzte Änderung		Länge
	Documentation/		2019-11-18 19:27		40
	Examples/		2019-08-20 05:23		25
	Old versions/		2023-03-05 10:09		10
	Screenshots/		2023-02-01 16:40		68
	2012-12-07 Debugger.png size: 1700 × 1051		2012-12-07 22:13		824237
	2012-12-22-DisassView.png size: 348 × 209		2012-12-22 19:20		41391
	2012-12-22-HexView.png size: 513 × 115		2012-12-22 19:20		39814
	2013-05-21 plus2 tape recorder.png size: 280 × 257		2013-05-21 13:39		37891
	2013-06-09 SPECTRA Interface.png size: 848 × 698		2013-06-09 18:04		271298
	2013-06-12 SPECTRA interface.png size: 764 × 528		2013-06-12 18:10		248263
	2013-10-19 Lenslok - Colossal.png size: 640 × 480		2013-10-18 18:48		53417
	2013-11-23 TC2086 Dock with Cartridge.jpg size: 333 × 268		2013-11-23 17:28		40648
	2014-04-01 DivIDE interface.png size: 402 × 318		2014-04-01 16:15		187733
	2015-04-26 Currah µSpeech.jpg size: 322 × 258		2015-04-26 18:37		38165
	2015-05-18 MF128.png size: 428 × 332		2015-05-18 17:56		124451
	zxsp-0.8.0.pre26.zip		2015-04-26 18:58		17437861
	zxsp-0.8.0.pre27.zip		2015-05-18 17:58		17522252
	zxsp-0.8.32-beta-fixed.zip		2023-03-07 16:48		17955479
	zxsp-0.8.33-beta-debug.zip		2023-03-11 17:56		18310110
	zxsp-0.8.33-beta.zip		2023-03-11 17:53		18059890

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