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Diffstat (limited to 'src/mame/drivers/alpha68k_n.cpp')
-rw-r--r-- | src/mame/drivers/alpha68k_n.cpp | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/mame/drivers/alpha68k_n.cpp b/src/mame/drivers/alpha68k_n.cpp index 04960429bf5..4d000571333 100644 --- a/src/mame/drivers/alpha68k_n.cpp +++ b/src/mame/drivers/alpha68k_n.cpp @@ -53,6 +53,19 @@ Notes: The chip is pin-compatible with Motorola MC68705U3, Motorola MC6805U2 and Hitachi HD6805U1. The 4k MC68705U3 dump in MAME is from a bootleg PCB. +Note from Guru: The bootleg 4k MCU dump was written to a genuine +Motorola MC68705U3 microcontroller and tested on the original Alpha +Denshi Kyros no Yakata PCB and works. Since the bootleg PCB is +visually the same this suggests the bootleggers copied the PCB 1:1 +including the HD6805U1 MCU data then adapted it for the 68705U3 with +minimal changes. +******************************* +romcmp -d *.bin +Comparing 2 files.... +kyros_68705u3.bin [3/4] kyros_mcu.bin [1/2] 99.902344% +kyros_68705u3.bin [4/4] kyros_mcu.bin [2/2] 88.183594% +******************************* + Sound Board ----------- |