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-rw-r--r--src/mame/machine/315-5838_317-0229_comp.cpp24
1 files changed, 12 insertions, 12 deletions
diff --git a/src/mame/machine/315-5838_317-0229_comp.cpp b/src/mame/machine/315-5838_317-0229_comp.cpp
index f4c0b69129b..6e703df17ff 100644
--- a/src/mame/machine/315-5838_317-0229_comp.cpp
+++ b/src/mame/machine/315-5838_317-0229_comp.cpp
@@ -4,31 +4,31 @@
315-5838 - Decathlete (ST-V)
317-0229 - Dead or Alive (Model 2A)
- 317-0229 - Name Club / Name Club Ver 2 (ST-V) (tested as RCDD2 in the service menu!)
- 317-0231 - Print Club Love Love / Print Club Love Love Ver 2 (ST-V)
+ 317-0229 - Name Club / Name Club Ver 2 (ST-V) (tested as RCDD2 in the service menu!)
+ 317-0231 - Print Club Love Love / Print Club Love Love Ver 2 (ST-V)
- Several Print Club (ST-V) carts have
- an unpopulated space marked '317-0229' on the PCB
+ Several Print Club (ST-V) carts have
+ an unpopulated space marked '317-0229' on the PCB
Package Type: TQFP100
Decathlete accesses the chip at 2 different addresses, however, I don't think there
- are 2 channels / sets of registers, instead the 2nd set of addresses are just a
- mirror that allows access to a different set of source roms; the tables etc. are
- re-uploaded before every transfer.
+ are 2 channels / sets of registers, instead the 2nd set of addresses are just a
+ mirror that allows access to a different set of source roms; the tables etc. are
+ re-uploaded before every transfer.
Dead of Alive has the source data in RAM, not ROM.
This is similar to how some 5881 games were set up, with the ST-V versions decrypting
data directly from ROM and the Model 2 ones using a RAM source buffer.
- Decathlete decompresses all graphic data with the chip.
+ Decathlete decompresses all graphic data with the chip.
- The Name Club games use the chip for decompressing data for the printer (full size
- versions of the graphics?)
+ The Name Club games use the chip for decompressing data for the printer (full size
+ versions of the graphics?)
- Print Club Love Love decrypts some start up code/data required for booting.
+ Print Club Love Love decrypts some start up code/data required for booting.
- Dead or Alive decrypts a string that is checked on startup, nothing else.
+ Dead or Alive decrypts a string that is checked on startup, nothing else.
Looking at the values read I don't think there is any address based encryption, for
example many blocks where you'd expect a zero fill start with repeating patterns