SpectREM (Spectrum Retro EMulator)

This is a ZX Spectrum emulator written for MacOS 10.10+

Features

• Emulates the 48k and 128k ZX Spectrum
• Extremely accurate Z80 core (developed by Adrian Brown)
  • Passes all emulator based tests for Z80 core accuracy including FLAGS, MEMPTR and SCF/CCF Q register
• Cycle accurate emulation of the ULA allowing all advanced colour demos to work correctly (the ones tested ;o) )
• Beeper emulation
• AY emulation
• TAP file loading and saving
• TAP Insta loading
• SNA 48k snapshot loading/saving
• Z80 48k/128k snapshot loading/saving
• Virtual tape browser
• Debugger (Under active development)
  • Memory Viewer
  • Graphical memory viewer
  • CPU view (registers and flags)
  • Pause, Resume
  • Step In
• ULAplus
• Automatically restores your last session
• Allows selection of the default 48k/128k ROM
• Imports labels generated when compiling with Pasmo and displays them in the disassembly window
  • Automatically looks for a file with the same name as the snapshot being loaded but with a .dbg extension

Peripheral Emulation

• SpecDrum
• Multiface 1
• Multiface 128

SmartLINK

• SmartLINK being developed by Paul Tankard. This uses an Arduino connected to a Retroleum SD card to allow input from the emulator to a real Spectrum e.g. keyboard and joystick. It also supports the ability to send what is running on the emulator directly to a real Spectrum in under 1 second.
• Currently only works on 48k Spectrum hardware
• Development goal is to use this as a development/debugger tool for the Spectrum

Todo list

• SZX
• Full debugger/disassembler
  • Step Over
  • Breakpoints
  • Break on Read/Write/Execute of a memory location
  • Screen debugger that shows what has been drawn to screen even when single stepping instructions
  • Screen debugger that can be used to show a specific memory page for 128k screen debugging e.g. look at the page updating that is going to be flipped too
  • Show on screen where the screen refresh location is for debugging colour effects