*'''P47.dsk''' : border left and right are flashing during game.
Perhaps the "reset r52 interrupt counter" shall does int<='0' instead of int<='1' as I added a not between gatearray and Z80. I have to reproduce the bug into NEXYS4 before all=> interrupts are checked ok (vs cpctech).
I know that ChaseHQ and Arkanoid looks great, so double RAM buffer (from &8000 to &BFFF) is actived, but normaly it shall unlock XOR and P47, so this second RAM part is perhaps badly plugged (A14 inversed ? WR on one and RD on another, double WR on one ?, bad memory size ?)=> VRAM is plugged correctly.
The SDRAM patched in order to write RAM under ROM is not implemented in VRAM mirror. Behaviour to check.=> VRAM mirror is something new since NEXYS2 to NEXYS4 so it seems a good way. => DISP signal not crossed correctly with crtc_W / bvram_W ? crtc scanner offset jumps problem ?
== Effort done ==