jttora.txt

JTTora FPGA clone of Tiger Road arcade faithful to original hardware
======================================================================

Please, read the main README file too.

You have just got an expensive $295 PCB according to eBay. You have in your hands
a faithful conversion of the circuits on the Tiger Road PCB to FPGA. If you come from
the emulation world here are some of the things different from emulators:

-Real CPU/GPU bus sharing with delays
-Sprites handled with DMA exactly as in the original hardware
-Palettes determined by the original PROMs
-Graphics priority handled by the original PROM
-No lag between image and input. Data is being sent to the screen in real time.
-Sound sampling rate: 41.663 kHz (original, 125/3 kHz)
-Accurate FPS 100% same as real hardware

These technical aspects mean that the game play will be different from an emulator
in a number of ways and that some hardware tricks that were not emulated will work
here as in the original hardware.

GAME PLAY
=========

The game uses two buttons: shot and jump.

Note that by default the continue prompt is disabled. If you want to
be able to continue, change this in the OSD. You can then save your settings
so it will be the same the next time you powerup.

TEST SCREEN
===========
Select the test screen through the OSD menu.  To pass on to the next test 
screen press both action buttons.

TECHNICAL INFORMATION
=====================
-All PSG channels had no load on the bootleg board
-YM2203 phi M =3.7MHz, phi S = 1.2MHz (measured with broken Z80, so default divider)
-DMA duration was measured to be xxx, matching the expected behaviour

REVISION HISTORY
================
21st Nov 2019
    - Fixes bug in SDRAM controller
14 Nov 2019: Public release (MiST and MiSTer)
13 Nov 2019: beta 3
    * Adds ADPCM sound to Japanese version
    * Updated to latest JT12 sound module. Fixes bug in JT49 envelope duration
    * Set JT49 compression to level 1 (29.1dB)
1  Nov 2019: beta release 2
    * FX sound added for western versions
    * Sprite glithces fixed
    * Still missing ADPCM sound on Japanese version
27 Oct 2019: beta release.
    * No FX sound. I don't understand why.
    * Sprite glitches due to 8-pixel data loading 
      (instead of 4 pixels as other CPS0 games)



CREDITS
=======

Brought to you by Jose Tejada, aka jotego. Meet me in twitter @topapate
Checkout my patreon page here: http://patreon.com/topapate

Special thanks to all October '19 patrons.

Tier +3 Patrons Thanks!!
========================

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