[Atari] Test7800 0.7.2 29/10/2025

Test7800 0.7.2 29/10/2025

• fixed implementation of ARR (undocumented 6502 instruction) corrects result of test binary in https://forums.atariage.com/topic/385516-fingerprinting-6502-processors

Test7800 0.7.1 18/10/2025

• Drag and Drop

• dropping of files should now work on all platforms including Windows and WASM

• POKEY mapping

• reading a POKEY address is now not possible, except for the random number register
• the data of the underlying cartridge is read instead
• this fixes a bug which caused Stone Age to fail
  • the game reads ROM addresses right down to $4000 which is where POKEY is mapped

test7800 0.7.0 12/10/2025

• Gamepad

• a gamepad or similar controller can now be used for player 1 input

• Drag and Drop

• dropping a ROM file from the desktop onto the application window will immediately load that ROM
  • this has not been well tested on Windows or MacOS

test7800 0.6.3 6/10/2025

Audio

• sample rate increased to 48000Hz
  • this improves POKEY audio that uses the 1.79Mhz clock
  • it's not always noticeable but pure tones generated by this clock can suffer when sampled a rate that is too low
  • the higher the sample rate the better but 48000Hz is a reasonable compromise value
  • added -samplerate option to allow setting the value

Cartridge Mappers

• Activision mapper (#28)
• Absolute mapper (#30)

test7800 0.6.2 29/09/2025

• Audio

• corrected POKEY two-tone mode
  • game music for A.R.T.I now sounds correct

• Cartridge Mappers

• SN2 mapper is now called Eagle
• SN1 mapper is now referred to simply as SN

• Other

• -ignore option now changed to -checksum
  • setting -checksum to false will allow unsigned cartridges to pass the NTSC checksum BIOS routine

test7800 0.6.1 28/09/2025

Audio

• improved POKEY emulation
  corrected how channels are filtered by other channels corrected reset time for 16bit timers. this affects the musical pitch of those channels when using the 1.79Mhz clock implemented two-tone mode

test7800 0.6.0 21/09/2025

• Audio

• added POKEY soundchip
  • -audio=stereo for stereo output of both TIA and POKEY
  • stereo for POKEY is only really effective for dual POKEY ROMs

• Cartridge Mappers

• and SN2 correctly (previous version was SN1 only)
• use -mapper=SN2 or -mapper=SN1 as appropriate

test7800 0.5.1 7/09/2025

• I messed up the release of v0.5.0 and hadn't included the Tiger Heli fix

test7800 0.5.0 7/09/2025

test7800 0.4.3 2/09/2025

• Bug fixes

• tweaked pre-DMA and interrupt overhead values
  • this fixes Ballblazer (#19) while maintaining previous fixes for for Karateka and Scrapyard Dog
• correct frame rate when running with no audio (-audio=false)

test7800 0.4.2 24/08/2025

• Bug fixes

• controller intialisation for two-button joysticks
  • fixes #20, #21, #22, #23, #24
  • player-two input is not yet implemented the issue of constant firing is fixed

• Bug fixes [Windows]

• emulator will exit correctly if ROM fails to load from file dialog [#18]
• second effort after bug reports persisted with v0.4.1

test7800 0.4.1 23/08/2025

Ace of Ace (1988, Atari)

I messed up the release of v0.4.0 a little bit. This is a re-release with a bumped version number

Changes since v0.3.0

• Bug fixes

• INPT2 and INPT3 should have high bit set when joystick is plugged in
  • fixes Crazy Brix
• extended bottom of visible screen by one for both NTSC and PAL
  • to match information given by '7800 Test (20141231).a78'
• delay after interrupt is not DMA blocking
  • Kung-Fu Master [#14]
  • Ikari Warriors [#16]
• DMA now only ever starts at end of CPU cycle
  • Ace of Aces [#17]
  • improves DMA tests in '7800 Test (20141231).a78'
• corrected DMA maximum cycles limit
  • fixes Super Skateboardin' [#15]
• corrected RIOT timer address mapping and tick rate
  • fixes Beef Drop [#13]

• Bug fixes [Windows]

• emulator will exit correctly if ROM fails to load from file dialog [#18]
• this fix is still contested

test7800 0.3.0 18/08/2025

Changes since v0.2.0

• Bug fixes

• 6502 will halt (due to RTI) mid-instruction if necessary
• cycle cost for DLI was being applied at the end of every DLL zone regardless of the DLI bit
• fixed how DMA cycles for holey graphics are accumulated
• DMA cycle cost for last DL header in sequence
  • all bug fixes contributed to fixing Scrapyard Dog (#12)
  • and to providing improved fixes for previously bugged games (eg. Karateka)

• A78 Cartridges

• recognition of supergame cartridges that don't require bank switching but do require additional RAM or ROM
  • Ballblazer is a good example of such a cartridge

• Joystick Emulation

• prevention of impossible joystick positions
  • ie. up/down (and left/right) not possible at same time
  • fixes graphical anomaly in Robotron (#10)
• added numberpad 'arrows' as input option for joystick direction
  • regular cursor keys still usable
• addded 'Z' and 'X' as joystick fire buttons
  • space button and 'B' button still usable

• Debugger

• improved STEP SCANLINE
• improved overlay
  • simplified colours of DMA areas
  • diagonal stripes indicate VBLANK area

• Palettes

• changed PAL palette to NTSC_A78_CRTTV_BRT.pal and NTSC_A78_CRTTV_BRT.pal

test7800 0.2.0 12/08/2025

test7800 0.1.0 5/08/2025

• first public rel