Join ZX-81 on his trip into the 80s with two more emulators — PSPSIM and PSP2600. Emulate the SAM Coupe home computer and the Atari 2600 game console.

PSPSIM packs many optimizations improving overall performance. Several games are now running 50 fps @ 222MHz.

PSP2600 also shows a speed upgrade by using the PSP GU to render its graphics. Another notable addition is ZX-81’s “auto-fire” mode; for games such as Plaque Attack or Space Invaders.

Download:
PSPSIM v1.2.1 fw 1.50
PSPSIM v1.2.1 cfw 3.xx
PSPSIM v1.2.1 source code

PSP2600 v1.1.2 fw 1.50
PSP2600 v1.1.2 cfw 3.xx
PSP2600 v1.1.2 source code

- source: ZX-81’s web site

PSPSIM v1.2.1 and PSP2600 1.1.2 changes…

PSPSIM v1.2.1 changes:

• Many optimizations to speed up the emulation in z80, video and sound emulation part. Many games are now fullspeed (50 fps) even at 222Mhz!
• Many new render modes and screen size options (normal, fit, max etc…)
• The emulator window can now be moved to fit the screen properly
• Add new hotkeys to setup render mode etc…
• Bug fix in the low battery watchdog
• RTrigger/LTrigger keys can be used in the keyboard settings menu to navigate between Normal, LTrigger and RTrigger compose mapping.
• Default Hotkeys can now be set in the keyboard mapping menu (useful to add hotkeys on existing/previous keyboard files)
• Code cleaning

PSP2600 v1.1.2 changes:

• Auto-fire mode, press RTrigger+X to switch it on/off useful for games such as space invaders! On given games, the auto fire can’t be stopped, so an option to stop it, is available in the settings menu.
• It uses now only PSP GU for rendering
• Speed improvements while using GU render modes
• IR keyboard support!
• Add .a26 as valid rom extension
• Add several new hotkeys settings, such as: fps, render mode, auto fire speed can now be directly modified inside the emulator
  (no need to enter in the settings menu). quick save / quick load current state (no need to enter in the main menu)
• New speed limiter options in settings menu
• RTrigger/LTrigger keys can be used in the keyboard settings menu to navigate between Normal, LTrigger and RTrigger compose mapping.
• Analog pad can be used in the rom file requester
• Default Hotkeys can now be set in the keyboard mapping menu (useful to add hotkeys on existing/previous keyboard files)
• Bug fix in the low battery watchdog
• Increase memory heap size in 3.x