readme by Guru, MAME 0.126u4
--
Slap Fight/Alcon
1986 Taito Corporation

Slap Fight and Alcon are the same PCBs exactly, with just 4 ROMs changed. The same MCU is
common to Slap Fight and Alcon. There is an alternate "A76" version of Slap Fight with its
own unique MCU code.

PCB Layouts - Top Board
-----------------------

Alcon -        M6100186A
               860100714

Slap Fight -   M6100179A
               860090333


8606S MADE IN JAPAN
|--------------------------------------------------|
|VOL ROM21.12Q                 2148                |
|MB3730                        2148                |
|    ROM19.12P                 2148                |
|                              2148                |
|    ROM20.12M                         6264        |
|                                                  |
|                                      6264        |
|                                                  |
|J                 A77_12.8J A77_11.6J 6264        |
|A    AY3-8910                                     |
|M                 A77_10.8H A77_09.6H 6264        |
|M    DSW1  DSW2                                   |
|A                                       2148      |
|     AY3-8910                                     |
|                                          ROM16.1E|
|                                                  |
|  A77_02.12D                              ROM17.1C|
|                                                  |
|                                     ROM18.2B     |
|  Z80A   2016                                     |
|                                                  |
|-----|----------|--------------|----------|-------|
      |----------|              |----------|
Notes:
      AY-3-8910 clock - 1.500MHz (36/24)
      Z80A clock - 3.000MHz (36/12)
      VSync - 57Hz
      HSync - 14.97kHz
      A77_02 - 2764 EPROM
      A77_09 to A77_12 - 27256 EPROM
      ROM18 - 18S030 PROM
      ROM16, ROM17, ROM19, ROM20, ROM21 - 82S129 PROM


Bottom Board
------------

8606M MADE IN JAPAN
|--------------------------------------------------|
|                        A77_13.6A                 |
|                                                  |
|    ROM14.2C                          ROM15.8B    |
|                                                  |
|                                                  |
|              2016      A77_04.6F                 |
|                                           36MHz  |
|              2016      A77_03.6G                 |
|                                                  |
|                                                  |
|                                                  |
|                                                  |
|                                                  |
|                        A77_08.6K                 |
|                                                  |
|                        A77_07.6M         2016    |
|     2016                                         |
|              2016      A77_06.6N       A77_01.8N |
|                                                  |
|              2016      A77_05.6P       A77_00.8P |
|                                           Z80B   |
|-----|----------|--------------|----------|-------|
      |----------|              |----------|
Notes:
      Z80B clock - 6.000MHz (36/6)
      ROM14, ROM15 - 82S129 PROM
      A77_00, A77_01 - 27256 EPROM (replace with A77_00-1, A77_01-1 on Alcon)
      A77_05 to A77_08 - 27256 EPROM
      A77_03, A77_04 - 2764 EPROM (replace with A77_03-1, A77_04-1 on Alcon)
      A77_13 - Motorola MC68705P5S Micro-Controller (protected). Clock 3.000MHz