Test7800 v0.7.3 is released. Test7800 is an experimental emulator for the Atari 7800. It's not complete and is missing some important features but it plays many of the 7800 ROM files that are available. It supports a78 files and will emulate regular "flat" ROM files and also "supergame" ROM files. It does not yet emulate the POKEY chip and similar hardware. The 6502, TIA and RIOT emulation is taken from Gopher2600 and is therefore well tested. The implemenation of the MARIA is new to this project.

Test7800 Changelog:
support for paddles and trakball
click right-mouse-button to toggle input
insertion is controlled entirely by the a78 header required for now. there are no command line options yet
automatic overscan detection
added -overscan command line option. set to AUTO by default
other options are NONE, MODERN, and FULL
implemented high score cartridge
a78 header is obeyed by default (-hsc command line option is set to AUTO)
implemented savekey
a78 header is NOT obeyed by default (-savekey command line option is set to FALSE)
if -savekey is set to AUTO (obey a78 header) or TRUE (always insert savekey) then the savekey is inserted into the right player port
play in full-screen
press F11 to toggle
re-ported CPU package from Gopher2600
fixes XAA and ANE instructions
CPU now passes the newly included Thom Harte single-step tests
randomised parts of the emulation are now properly random
fixed seed was used inadvertently
various changes to debugger
added commands and altered output
re-ported ARM and ELF package from Gopher2600
now includes chameleon cart NV ram functions

Download: Test7800 v0.7.3
Source: Here