S.T.U.N. Runner for Analogue Pocket 0.1.0

S.T.U.N. Runner for Analogue Pocket 0.1.0

First release that plays: boot, the attract sequence with its 3D demo, coin and Start, level select, and gameplay with sound.

An openFPGA reimplementation of Atari's Hard Drivin' "multisync" hardware: 68010 main board, TMS34010 graphics processor, ADSP-2100 DSP, JSA II sound board (6502, YM2151, OKI6295). All gateware, verified against MAME as the oracle (see docs/verification.md in the repository).

Installing

1. Copy Cores/, Platforms/ and Assets/ from the zip onto the root of the Pocket's SD card.

2. Build the ROM image from your own MAME stunrun romset and copy it to Assets/stunrun/common/stunrun.rom:

   python3 mra_build.py stunrun.mra stunrun.zip

   Python 3 only; the script checks every ROM's CRC32 and the finished image's md5. Assets/stunrun/common/README.txt on the card explains the same steps. No ROMs are included.

Controls

D-pad or left stick: steer and pitch (the yoke; a centred yoke is the arcade's "lowered" position). A / X / R: fire. B / Y / L: boost. Select: coin. Start: start.

Known differences from the arcade

• The 3D scenes render at 15 frames per second where the arcade does 20; game speed and logic are unaffected.
• The attract sequence runs about 2.5 seconds behind MAME's timeline.
• For a few seconds while the core loads, before the game clears its frame buffer, the picture shows whatever the previous core left in memory.

Fixed since the earlier test builds

• Mid-level sound drone: the 68k's sound commands are paced past the 6502's one-cycle NMI dead spot (the command latch no longer sticks full).
• Attract-demo band of title-screen pixels: the GSP now serves host-port accesses between its memory cycles, so the starfield backdrop is painted in time.
• Half-width picture, level-select flicker, steering polarity, D-pad ramp (from the earlier builds).