Zitat von
spacious_mind
I don't know if anyone experienced it in the past with the originals. The Regency I have used to be the buggiest from what I remember especially around time control, when I played and compared them to Challenge, Legend, Legend II, Ivan, Igor, Mirage and Avenger. They all btw pretty much have the same base chess program.
Hi,
As you may know, the ROM in these chess computers is mainly internal (with some exceptions in which part or all of the ROM is external), that is, it's embedded in the H8 microcontroller. It turns out that when we have reverse engineered many computers with H8 microcontroller we have found the same model with different types of microcontrollers. For example this has happened with Excalibur Mirage, Ivan the Terrible, Novag Aquamarine RISC II, Systema Challenge... and also many situations where different models share the same microcontroller (and therefore same ROM). It's all quite confusing.
For example, on the subject you mention:
I have owned, and analysed, two Systema Challenge: One with a 1993 MCU and one with a 1996 MCU from Krypton Regency! See attached pictures.
I've been able to do ROM dump of the second unit mentioned, but unfortunately I gave away the first unit and hope to get it back (temporarily) in September to do the ROM dump of what we believe to be the "genuine" Krypton/Systema Challenge.
hap is doing a lot of research on this, and including all this information in the MAME drivers themselves. We will discover even more interesting and surprising things.
Gerardo "Berger"