Patrik Rak is back with an update to ZXDS, an impeccable Sinclair ZX Spectrum emulator for the Nintendo DS (previous update here). It's been a while since we last heard from this homebrew developer - about half a year, in fact - and there's quite a lot of changes and new features added to this release since the last one.

• TR-DOS emulation, allowing loading of TRD/SCL disks (including autoboot).
• For/next loops in TZX files are now supported.
• Screenshot support, for SCR/BMP saving and SCR loading.
• Color/grayscale palette toggle for more nostalgic look.
• Mode for black and white display of ink/paper only, without attributes.
• AY ACB and ABC stereo modes and narrow/wide stereo separation.
• Choice of three relative AY and speaker volume levels.
• Changed AY volume tables to match the real machine more closely.
• Implemented fake low-pass AY filter to avoid aliasing issues in some tunes.
• Fixed setting of AY envelope register even if it doesn't change, fixes few sound effects.
• Fixed sound clamping when all channels played at full volume and speaker was off.
• Few other subtle changes (initial config autosave, even more safe shutdown).

Via ZXDS home page