ez80: adjusted I/O bus timings

Source/HBIOS/cfg_RCEZ80.asm

@@ -414,9 +414,12 @@ EZ80_MEM_MIN_WS	.SET	0		; MINIMUM WAIT STATES TO APPLY, IF EZ80_WSMD_TYP = EZ80W
 ;
 ; BUS TIMING FOR EXTERNAL I/O ACCESS (CS2)
 EZ80_IO_CYCLES	.SET	4		; IO BUS CYCLES (1-15) TO APPLY, IF EZ80_WSMD_TYP = EZ80WSMD_CYCLES
-EZ80_IO_WS	.SET	5		; IO WAIT STATES (0-7) TO APPLY, IF EZ80_WSMD_TYP = EZ80WSMD_WAIT
-EZ80_IO_MIN_NS	.SET	320		; CALCULATE AT BOOT TIME THE REQUIRED W/S OR B/C, IF EZ80_WSMD_TYP = EZ80WSMD_CALC
-EZ80_IO_MIN_WS	.SET	6		; MINIMUM WAIT STATES TO APPLY, IF EZ80_WSMD_TYP = EZ80WSMD_CALC
+EZ80_IO_WS	.SET	7		; IO WAIT STATES (0-7) TO APPLY, IF EZ80_WSMD_TYP = EZ80WSMD_WAIT
+EZ80_IO_MIN_NS	.SET	250		; CALCULATE AT BOOT TIME THE REQUIRED W/S OR B/C, IF EZ80_WSMD_TYP = EZ80WSMD_CALC
+
+; THE MINMUM W/S SHOULD BE AT LEAST 1 GREATER THAN THE HOLD TRIGGER COUNT PROGRAMMED WITHIN THE PLD OF THE
+; EZ80 INTERFACE MODULE.  SEE THE EZ80-CPU.PLD FILE WITHIN THE EZ80 FIRMWARE CODE BASE
+EZ80_IO_MIN_WS	.SET	7		; MINIMUM WAIT STATES TO APPLY, IF EZ80_WSMD_TYP = EZ80WSMD_CALC
 ;
 ; APPLY CYCLES, W/S OR CALCULATE CYCLES BASED ON DESIRED PERIOD
 EZ80_WSMD_TYP	.SET	EZ80WSMD_CALC	; BUS WAIT STATE CONFIG: EZ80WSMD_[CALC|CYCLES|WAIT]