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stephh
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Reged: 07/23/06
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Re: Sega System 1's "SW 0 READ FROM" dip switch
07/08/12 02:55 AM
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> What's the purpose of the "SW 0 READ FROM" dip switch (switch 8 on bank B)? I've been fiddling with it and can't see any obvious differences.

There is NO difference in MAME because BOTH IO adresses (0x0d AND 0x10) are mapped to read Dip Switch bank B :

Code:


AM_RANGE(0x0d, 0x0d) AM_MIRROR(0x02) AM_READ_PORT("SWB")    /* DIP1 some games read it from here... */
AM_RANGE(0x10, 0x10) AM_MIRROR(0x03) AM_READ_PORT("SWB")    /* DIP1 ... and some others from here but there are games which check BOTH! */



Steph from The Ultimate Patchers






Entire thread
Subject Posted by Posted on
* Sega System 1's "SW 0 READ FROM" dip switch SanRinSanChan 07/07/12 01:43 PM
. * Re: Sega System 1's "SW 0 READ FROM" dip switch stephh  07/08/12 02:55 AM
. * Re: Sega System 1's "SW 0 READ FROM" dip switch SanRinSanChan  07/08/12 09:33 AM
. * Re: Sega System 1's "SW 0 READ FROM" dip switch SanRinSanChan  08/03/12 10:11 AM
. * Re: Sega System 1's "SW 0 READ FROM" dip switch hap  08/03/12 11:47 PM

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