MiSTery - An Atari ST/STe core for FPGAs

Features:

• Cycle accurate STe GLUE+MMU combo (re-created from the original schematics)
• Cycle accurate FX68K CPU core
• Cycle accurate Blitter offered by Jorge Cwik
• Mostly cycle accurate shifter based on schematics made from reverse engineering
• MegaSTe 16 MHz CPU mode
• Turbo bus - double RAM access speed
• RAM size up to 14MB
• Support for all TOS versions
• 2 Floppy disc drives
• ACSI hard disc support
• Viking compatible hi-res monochrome card support
• Real IKBD with HD63701 MCU
• Real MIDI input/output using MiST's UART pins
• Serial/parallel port redirect to USB
• Internal Cubase dongle
• Gauntlet type 4 joystick interface support
• STe controller port support
• RP5C15 RTC Chip
• Ethernet interface in cartridge port (Ethernec) support
• USB-RTC support
• Optional scandoubled/YPbPr video output
• Currently it runs on the MiST board, but the code is modular, so it's possible to add other boards

Usage for MiST:

Put the core.rbf and the TOS as tos.img to the SD-Card. TOS/hard disc/floppy images are selectable in the OSD (F12). With F11, you can toggle between normal and STe joystick ports.

Current issues/limitations:

• No RAM cache for Mega STe (but the cache control selects turbo bus speed)
• Only fake LMC1992
• PAL clock only (32.084 MHz)
• Since Jagpads have 21 buttons, not all are mapped to MiST controllers when using STe game ports
• No STe paddle handling (but it has 0 software support)

Thanks to:

• Till Harbaum for the MiST board, original MiST core, new IKBD code
• Jorge Cwik for the FX68K CPU core, FX ST Blitter code and shifter decap
• Christian Zietz for recovering the schematics of the GSTMCU