From 5c7e89ec444ad08a2bc90cd8de5662f5dea98616 Mon Sep 17 00:00:00 2001 From: braintro Date: Fri, 27 Sep 2019 09:33:46 -0500 Subject: [PATCH] dec0.cpp: Decapped and dumped the i8751 MCU for Dragonninja (Japan revision 1) [TeamEurope, Brian Troha] --- src/mame/drivers/dec0.cpp | 21 +++------------------ 1 file changed, 3 insertions(+), 18 deletions(-) diff --git a/src/mame/drivers/dec0.cpp b/src/mame/drivers/dec0.cpp index c434575009e..1b78501b745 100644 --- a/src/mame/drivers/dec0.cpp +++ b/src/mame/drivers/dec0.cpp @@ -54,21 +54,7 @@ ToDo: - Hook up the 68705 in Midnight Resistance (bootleg) (it might not be used, leftover from the Fighting Fantasy bootleg on the same PCB?) - Get rid of ROM patch in Hippodrome; - background pen in Birdie Try is presumably wrong. -- Pixel clock frequency isn't verified; -- Finally, get a proper decap of the MCU used by Dragonninja - - -The current Dragonninja MCU program was made by hacking the expected startup -synchronisation command in the Bad Dudes MCU program (location $09A4 changed -from $0B to $03). There may be other differences in a real Dragonninja MCU. -The table of expected values for command 7 is the same for Dragonninja (from -debugging main CPU program). - -Bad Dudes only seems to use commands $0B (sync), $01 (reset if parameter is not -$3B), $07 (return table index if parameter matches table otherwise reset) and -$09 (set table index to zero). Dragonninja only seems to use commands $03 (on -startup), $07 (same function as Bad Dudes) and $09 (same function as Bad -Dudes). Most of the MCU program isn't utilised. +- Pixel clock frequency isn't verified Guru-Readme for Data East 16 bit games (Updated 7-Feb-2017) @@ -2386,9 +2372,8 @@ ROM_START( drgninja ) /* DE-0297-0 main board, DE-0299-0 sub/rom board */ ROM_REGION( 0x10000, "audiocpu", 0 ) /* Sound CPU */ ROM_LOAD( "eg07.8a", 0x8000, 0x8000, CRC(001d2f51) SHA1(f186671f0450ccf9201577a5caf0efc490c6645e) ) - ROM_REGION( 0x1000, "mcu", 0 ) /* i8751 microcontroller - using hacked baddudes program */ - ROM_LOAD( "eg31.9a", 0x0000, 0x1000, CRC(c3f6bc70) SHA1(3c80197dc70c6cb283df5d11d29a9d9baabcd99b) BAD_DUMP ) // Hand crafted, needs real dump - + ROM_REGION( 0x1000, "mcu", 0 ) /* i8751 microcontroller */ + ROM_LOAD( "eg31.9a", 0x0000, 0x1000, CRC(657aab2d) SHA1(c3b3837d1208596509e09ddd8e3e58845a4e07b2) ) /* various graphic and sound roms also differ when compared to baddudes */ ROM_REGION( 0x10000, "gfx1", 0 ) /* chars */