AMIGA 500 OCS Version 2 Alpha 3

• Up to three floppy drives (df0:, df1:, df2:), each of them either a read/write *.adf disk image or the built-in MEGA65 drive. Choose how many drives you want and what each one is in the "Drive Settings" menu. The workbench screenshot attached to this post shows an example configuration: df0: Workbench boot disk. df1: Workbench Extras. df2: Physical Disk, Deluxe Paint example pictures. Learn more about this here: https://github.com/sy2002/AExp/blob/dev-hw-fdd/doc/drives.md

• Hardware Floppy: the built-in MEGA65 disk drive reads real Amiga disks (read-only, double density media only). Learn more about this here: https://github.com/sy2002/AExp/blob/dev-hw-fdd/doc/hardware_floppy.md

• Authentic A500 sound: A500 audio Filter + LED Filter (both default on): Learn more about this here: https://github.com/sy2002/AExp/blob/dev-hw-fdd/doc/audio.md

• Stereo Mix option: Learn more about this here: https://github.com/sy2002/AExp/blob/dev-hw-fdd/doc/audio.md

• Master volume control (perceptual loudness taper): Particularly useful, if you are on headphones. At least my MEGA65 is way too loud, so you can now adjust the analog audio volume.

IMPORTANT: This is an ALPHA version, so expect bugs and instable behavior. There is a RELEASE version of this core here: https://discord.com/channels/719326990221574164/801767398675316756/1530638892045434983 Use the release version if you just want to have a bit of fun with the Amiga core. Only try this Alpha version, if you're ready to accept bugs, maybe even corrupted ADF files due to potential bugs in the multi-disk writing. I tested it kind-of and "works-for-me", but I do need more people to test it so that we can be sure.

Please do read the docs mentioned here before asking about these very things in the <#1313409877393276948> channel.

Please do NOT report bugs in the <#1313409877393276948> channel as my capacity is not big enough to scan there for bugs, track the status, etc.. I will only work on bugs that are reported properly (reproduction, etc.) here: https://github.com/sy2002/AExp/issues

IMPORTANT NOTE ON PHYSICAL DISKS While the ADF disk image support in Alpha 3 seems to be pretty stable, the support for physical disks is not yet. Way too often, the core throws read errors and you need to click on "Retry" veeeery often. Together with (and special thanks to) deft I am debugging and improving this. Watch out for an Alpha 4.

Enjoy 🙂

MSX1 core alpha1 for the MEGA65

Source code: https://github.com/piso77/MSX1-MEGA65

MSX1 for MEGA65

Relive the MSX1 on your
MEGA65!

This core turns the MEGA65 into a PAL MSX1 home computer. Load cartridge
ROMs and disk images straight from the SD card and run them at the original
MSX1 hardware timing, with the MEGA65 keyboard, joysticks, video and audio
all wired up and configurable through an on-screen menu.

Credits

• This core is a port of the
  MSX1 core of the MiSTer project,
  created and maintained by the MiSTer Development Team.
  
• The Z80 CPU is based on the T80 core by Daniel Wallner and contributors.
  
• Paolo Pisati ported the core to the MEGA65 in 2026.
  
• The core uses the MiSTer2MEGA65
  framework and QNICE-FPGA for FAT32
  support (loading ROMs, mounting disks) and for the on-screen menu.

See the AUTHORS file for the full list of credits, and
VERSIONS.md for the changelog.

Features

• PAL MSX1, running at the exact original core clock (42.95455 MHz)
  
• Cartridge ROM loading into two slots, Slot A and Slot B (up to
  256 KB each)
  
• Disk image mounting on drive 8 [NOT WORKING YET]
  
• MEGA65 keyboard mapped to the MSX keyboard matrix
  
• Vanilla C= joystick support: do not connect MSX joysticks!!!
  
• Rich video options via the on-screen menu:
  
  • VGA 720 x 576 (4:3), plus retro 15 kHz modes (HS/VS and CSYNC) for
    analog CRT displays
    
  • HDMI 720p at 50 Hz or 60 Hz and several other display modes,
    Flicker-free, optional CRT emulation and Zoom-in, and DVI (no sound)
    
• Audio via the 3.5 mm jack and via HDMI, with an "Audio improvements"
  option
  
• Both MEGA65 SD-card slots are supported

Let's talk in <#1534194620911587349>

"So many Cores! I am losing track!" --- https://cores.mega65.org/ is here to help you, with the very latest info up to the new MSX-1 core and the latest developments in the Amiga Core. Also, check out https://c64.mega65.org/alphasix.html for all the shiny new stuff in the C64 Alpha Cores. And if any new updates come along this week - sorry, no updates until Monday, August 10th due to a short vacation.