-- v1.00 for HW v1.0 based on v024 for HW v0.5
-- v1.01 with org cpu68 & flip flop v1.01
-- v1.02 SYS3 setting support (together with ro SD v2 )
-- v1.03 cpu68.vhd v081 ( daa did not set Zero-Flag which causd the offset bug), back to eeprom v091
-- v1.04 eeprom 0.93, better saving in menue
-- v1.05 first working sys7 version :-) together with cpu68.vhd v083
-- v1.06 secured handling of special solenoids with flipflops v1.1
-- v1.07 more secured handling of special solenoids with spec_sol_trig v0.3
-- v1.08 prevent 'self activation' with flipper buttons of special solenoids
-- v1.09 (v2.09 for Cyclone IV) added pulsetime adjustment for special solenoids
-- v1.10 (v2.10 for Cyclone IV) deactivate sp_solenoid_mpu(1), as it pulses during game on, selftest on spec sol1 will not work
-- v1.11 (v2.11 for Cyclone IV) small timing adjustments
-- v1.12 (v2.12 for Cyclone IV) with memory protect and flipflop version 1.3 ( solves soundbug)
-- v1.13 (v2.13 for Cyclone IV v3 & v3.13 for Cyclone IV v4) with eeprom v094 which has reduced clock to 100KHz (old 1MHz) solves 'nvram bug' with v3 FPGA
-- v1.14 (v2.14 for Cyclone IV v3 & v3.14 for Cyclone IV v4) solenoid 17 with peak filter as we have 9uS peaks each 2mS on sp_solenoid_mpu(1);
-------- added 4.14 for Cyclone 10
-- v2.15 for Cyclone IV v3 & v3.15 for Cyclone IV v4 & 4.15 for Cyclone 10 -> fixed sys3/sys4 settings bug, optimized timing
-- v1.16 Cyclone II only, option for game 'CONTACT' patch for special solenoid 6 (SOL 22)
-- vx.17 eeprom write robustnes (new SD_card and eeprom.vhd ) DO NOT USE, SMALL Bug
-- vx.18 switch matrix hardware debouncer (sw_debounce.vhd), per-switch mask, DIP5 selects debounce on/off
-- vx.19 special solenoid debounce switchable via DIP4 (250us / 57us), plus META_SPECIAL1..6 synchronizers
--        moved from clk_50 to cpu_clk (target domain of spec_sol_trigger)
-- vx.20 switch debounce mask is now game dependent: one mask per game (0..31) in a 2kbit M9K rom,
--        selected by the game number. Derived from switch matrix names plus a cross-check against the per-switch
--        handler groups in each game rom.