A Master System emulator for the Gameboy Advance & Nintendo DS, as an old Master System owner myself I have a soft spot for these one's but I'll hold back the wave of nostalgia as its news time now:

• Added copying of first 32kB ROM to VRAM for faster execution.
• Added selection of machine.
• Added correct noise generation for SG-1000 emulation.
• Added correct palette in TMS9918 modes on SMS machines.
• Added different vdp capabilities depending on selected machine.
• Added some very basic Mode5 support when Machine=MegaDrive.
• Added different io maps depending on selected machine.
• Added support for the SMS1 tilemap address masking (Ys(J)).
• Added support for turning on/off internal RAM.
• Added auto save of SRAM (if it's allready present) when entering menu.
• Added auto turn off of Bios when no header found (on machine=Auto).
• Added auto region (Pop Breaker GG (J)).
• Fixed support for Dodgeball King (KR).
• Fixed pushing and poping of AF register (Adventure of Batman GG).
• Fixed sprite bugs in unscaled mode on Codemasters games.
• Fixed initializing of all CPU regs on reset.
• Fixed timing of HALT instruction.
• Fixed palette setting for TMS9918 modes on GG.
• Fixed noscrolling for TMS9918 modes.
• Fixed up Mode1 graphics a bit.
• Fixed correct HCounter and latching.
• Better switching between TMS9918 and SMS video modes.
• More info shown from the game header.
• Optimised tile rendering for mode 0 & 2 (for real this time).
• Optimised all Z80 memory reads, one instruction and cycle shorter.
• Optimised DAA opcode.
• Optimised DEC opcodes.
• Optimised SBC A/HL opcode.
• Optimised one of the SRA opcodes.
• Optimised CPI, CPD, CPIR & CPDR opcodes.

Download from the homepage.