Joust 2

Joust 2 (Williams 6809 "rev 2") compatible openFPGA core the Analogue Pocket.

Based on the FPGA Joust2/Inferno/Mystic Marathon/Turkey Shoot cores by Dar, and ported from the following MiSTer core repos:

• Joust 2 by birdybro and Dar
• Inferno by birdybro and JasonA
• Turkey Shoot by birdybro
• Mystic Marathon by birdybro and JasonA

Note that the original cores are all very similar - this core refactors all of these into a single core supporting the individual board variants' minor differences.

Compatibility

This core supports the arcade games running on the Williams 6809 "Rev 2" arcade board. The list of games includes:

• Joust 2 - Survival of the Fittest
• Inferno
• Turkey Shoot - The Day They Took Over
• Mystic Marathon

Note that arcade games supported by earlier Williams "Rev 1" (i.e. Defender, Joust, etc.) 6809 board are not supported by this core - but are supported in the following cores:

• Defender/Early Rev 1
• Robotron/Late Rev 1

Service Mode Controls

Buttons for service-mode controls (for the high-score-reset and in-game service menu) are mapped as follows:

• Advance -- Select + L
• Auto-up -- Select + up
• Reset High Scores -- Select + R

Inferno - "Diagnoal Control" Mode

Inferno features dual joystics, offset at 45-degrees (similar to Q-bert) for both movement and aiming. This doesn't translate amazingly-well to the Analogue Pocket d-pad, which is not very precise in the diagonals.

Disabling the Diagonal Controls option in the interact menu allows the user to toggle between using the diagonal controls on the d-pad/buttons or mapping the raw Up/Down/Left/Right directions to Up-right, down-left, up-left, and down-right respsectively.

By default, the Diagonal Controls option is set.

Inferno - "Auto-fire on Aim" mode

Inferno's joysticks support movement and aiming - but firing is accomplished through a dedicated button which is mounted to the top of the "aim" joystick. This is mapped to the R-button on the Pocket by default. However, enabling "Auto-fire on Aim" results in the fire button being pressed automatically when any direction on the "aim" joystick is active.

By default, Auto-Fire on Aim is set.

Inferno - Analog Controls

Users with dual-analog joysticks are able to use the twin-sticks for control and aim, without additional configuration. Analog sticks operate in Diagonal mode, regardless of the "Diagonal Control" interact menu setting.

Turkey Shoot

Turkey Shoot uses an X/Y encoder-based light gun in the original arcade machine. The movement of the gun is simulated using the d-pad on the Analogue Pocket. A single-pixel crosshair represents the gun's aiming position on screen.

When the "Fast Aim" button is held (mapped to the R trigger by default), the crosshairs move across the screen twice as fast as the default speed. This allows for more precise control when needed - the targets are indeed very small on the Pocket's screen.

Usage

No ROM files are included with this release.

Install the contents of the release to the root of the SD card.

Place the necessary .rom files for the supported games onto the SD card under Assets/joust2/common.

To generate the .rom format binaries used by this core, you must use the MRA files included in this repo, along with the corresponding ROMs from the most recent MAME release.

History

v0.9.0

• Initial Release.

Attribution

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-- Williams by Dar (darfpga@aol.fr)
-- http://darfpga.blogspot.fr
-- https://sourceforge.net/projects/darfpga/files
-- github.com/darfpga
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-- gen_ram.vhd & io_ps2_keyboard
-------------------------------- 
-- Copyright 2005-2008 by Peter Wendrich (pwsoft@syntiac.com)z
-- http://www.syntiac.com/fpga64.html
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-- cpu09l - Version : 0128
-- Synthesizable 6809 instruction compatible VHDL CPU core
-- Copyright (C) 2003 - 2010 John Kent
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-- cpu68 - Version 9th Jan 2004 0.8
-- 6800/01 compatible CPU core 
-- GNU public license - December 2002 : John E. Kent
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-- MC6809
-- Copyright (c) 2016, Greg Miller
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-- HC55516/HC55564 Continuously Variable Slope Delta decoder
-- (c)2015 vlait
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-- JT51 (YM2151). <http://www.gnu.org/licenses/>.
-- Author: Jose Tejada Gomez. Twitter: @topapate
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See individual modules for details.