This is the original version and the earliest set. If you look, these program EPR numbers fit between the “Video ROMs Part 2” at MPR-19802 and the audio CPU code at EPR-19807. I don’t think they would be for Step 1.0, but it is possible.
New Clone Added (not working)
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Virtua Striker 2 (Step 1.5, older) [Mr. CAST, Yohji, Smitdogg, The Dumping Union]
Comment:
Made a significant change to how stepper motors operate in MAME - it is now possible to align a reel motor properly in the interface (namely by specifying what motor phase is active at 0). As a consequence, reverse spin should only be specified in layouts, and optical alignment should be much better.
As a note, Scorpion 4 has had its interface changed to one specifically for its reel type, it may be worth watching for regressions in their behaviour as a result. It looks like that particular reel type can move its opto tab around the circumference of the unit, so different interfaces may be needed.
Official version manufactured in Italy by Gecas under license with genuine DECO custom parts. Also based on notes in the driver the Western Express (world?) set has been changed to bootleg status.
New Clone Added
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Express Raider (Italy) [Tirino73]
Note: Most Atari games have additional filters. At some stage, discrete processing needs to be added. The Quad Pokey needs to become a device to properly and efficiently emulate outputs being tied together. This will trigger some changes to the Pokey device, namely the introduction of a base device.
- Derived internal resistance calculation from Pokey documentation. This is a 4-bit parallel resistor (High-Z mos "devices") network to ground. The result is a non-linear resistance function.
- Added low-pass filter support and opamp/resistor stages to the pokey driver. This is not as good as complete discrete emulation, but a lot better than the linear approximation we had before.
- Changed a couple of drivers to use the new output volume calculation.
- Added device configuration macros. Made all drivers use them.
- Added pinout documentation and dipswitch locations. [kanikani]
- Fixed issues with analog controls. [hap]
- Added second ADPCM chip and started to make sense on how these are hooked up. [hap]
