patching Williams ROMS for non-ghosting LED's

[studley67]

i apolagize for my ignorance,having never encountered the issue.

[pinnies4me]

p.s. i have never used LEDS,i am a pureist except AC/DC

they're ok when done tastefully, but i tend to agree with you.

Agree too. I actually plan to take the LEDs *out* of my MM and MB (they came with them) as I prefer the less intense normal lamps.

[Sinbad79]

p.s. i have never used LEDS,i am a pureist except AC/DC

they're ok when done tastefully, but i tend to agree with you.

Agree too. I actually plan to take the LEDs *out* of my MM and MB (they came with them) as I prefer the less intense normal lamps.

if youre familiar with the maze of ramps on a demo man and the level of difficulty in getting to the globes under this mess, then youll understand why ive gone leds.
i use warm frosted colours to match the inserts under the playfield, which look pretty much like globes, in fact i cant tell the difference.

warm white frosted bulbs for GI all the way.

[studley67]

so if you cant tell the difference why change?

[Sinbad79]

so if you cant tell the difference why change?

longevity and hard to reach to replace.

[studley67]

each to there own

[beaky]

the insert lamps are strobed to keep the filaments warm, if you have Leds fitted then this strobing can cause some leds to "ghost"
the patch increases the delay between clearing the row / column data and writing the next row /column data. so more off time.

WMS changed the code for wpc95 games (they added a 30uS delay) so the patch changes the wpc and wpc-s lamp code to wpc95 lamp code.
i may have interpreted the explanation wrong but thats what i believe the patch programmer was trying to say

so more off time in the strobing

if you use "AC" leds for the G.I. then you will lose the flicker effect until the G.I. is dimmed. there is no way to stop led flicker once the G.I. is dimmed without modifying the G.I. circuit

using leds for G.I. reduces the load on the G.I connector on the driver board (WPC and WPCS) and reduces the heat emitted from the diodes used in the G.I circuit on wpc95 (where fitted)
 

[studley67]

thx for taking the time to explain,andrew

[beaky]

thx for taking the time to explain,andrew

No problemo

[Retropin]

Lot of work those LED's eh?

[studley67]

but think about the longevity,lol.plus done right they look like original lamps.hehe.

[Retropin]

done right they look like original lamps.hehe.

GENIUS!!! New stuff that looks like old stuff!!... So all I have to do is re program some chips and possibly modify the whole GI circuit??

..Cant think why I haven't done it already 

[studley67]

but think of all the work it has created,

[robm]

Ahh come on you old farts, get with the times...I still haven't got around to LEDing my MB, and it looks all a bit dull and tired next to a Theatre of Magic with LEDs done right.

[Retropin]

but think of all the work it has created,

And something you only ever have to do once because they never ever fail until the 49,999th hour and 59 minutes of use!