Sinclair ZX80 / ZX81 / Z88 Forums

Yes, I think that the problem was about the strange ROM, since I never saw such behaviour. Regarding the board orientation is not an easy thing since various logic about pawn and castling etc, but I'll put in the todo list. What anyway I can do now is providing a version in which the black is starti...

The en-passant should be properly managed: as said just double-step on first move of every pawn allows it. Easy to test various combination with this "flexible" version moving appropiately both sides. Also manual moves are checked for legality, with the only exception for castling in which there is ...

I tested the en-passant and it is working. The way is the usual one: you take the piece you want to move and put it in the destination square! If it happen to discover a strange situation (this or another) please report it and I'll investigate! Good to know that alfa-beta version is stronger! Anyway...

So, here it is: the flicker free release of 1k real chess for ZX80. Hope is working! 8-) Attached there are 2 versions; one using alfa/beta pruning on 4 ply, the other quiescence search on 3-5 ply (I've still to merge of the two capabilities). Both are still without initial move logic and full optim...

Then will be easily done!

This weekend I'll post new version!

So, the good news seems that the engine logic is working!

Regarding the move input I didn't change, and last time yourself preferred the "flicker" version! If the ROM is bugged can it be corrected there? This weekend I'll try again on my ZX80. I'll try to ask also the opinion of Paul.

It took me more than I originally tought but here there the first version of the 1K Real Chess for ZX80 !! Just the flexible verison, still not optimized and without openiing logic, but hope it's working. A big thanks to Paul Veltjens for the real HW support and Paul Farrow for the recursive step-ov...

chernandezba wrote: ↑Tue Feb 27, 2018 10:20 pm

marste wrote: ↑Sat Feb 24, 2018 1:16 am

In the meantime I would like just to show what I did with the trace (out 53) and some postprocessing scripts: an interactive navigation of all the engine calls equote]xecuted in the

Port 53??

viewtopic.php?f=3&t=2408&p=27499&hilit=port+53#p27499

I tried time ago the telnet debugging interface, but was not so confortable... But seems this emulator is anyway always full of surprises!! :D I've to understand how to use it... do you know if there is a tutorial for this zx-debugger? Hope can work with my beloved fasmg compiler!... In the meantime...

ZesarUX is a great emulator. The only area it really needs improvement is debugging: it seems that all the facilities are there but the user interface is not very "approcheable"... Maybe creating an extension for this fantastic editor https://code.visualstudio.com/docs/editor/debugging , or similar ...