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return the right amount of data for wider levels (nw)

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This commit is contained in:
David Haywood 2013-08-03 01:44:14 +00:00
parent c4e86064b5
commit 6baf546e3f
1 changed files with 6 additions and 69 deletions
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75
src/mame/machine/pgmprot_igs027a_type1.c
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@ -659,60 +659,8 @@ void pgm_arm_type1_state::command_handler_puzzli2(int pc)
so it's probably compressed somehow as well as scrambled? 68k doesnt know in advance how big each lot of data is either, it only stops
writing when it gets a difference response from the MCU.
(puzzli2 left, puzzli2 super right) (Stored at 153ea - 15411 in puzzli2s program) results read back are the same, the data for level 1 is at f916, there does seem to be some form of pattern every 16 bytes?
00138278: 31 00fd 001387de: 31 007e
00138278: 31 0087 001387de: 31 000e
00138278: 31 0032 001387de: 31 0098
00138278: 31 0029 001387de: 31 00a8
00138278: 31 0031 001387de: 31 007c
00138278: 31 003f 001387de: 31 0043
00138278: 31 00b0 001387de: 31 00e4
00138278: 31 0035 001387de: 31 00a2
00138278: 31 0071 001387de: 31 006a
00138278: 31 002d 001387de: 31 00e0
00138278: 31 00d5 001387de: 31 00ed
00138278: 31 000d 001387de: 31 0024
00138278: 31 0034 001387de: 31 00bb
00138278: 31 0059 001387de: 31 00bd
00138278: 31 00dd 001387de: 31 002e
00138278: 31 0023 001387de: 31 00d6
00138278: 31 007a 001387de: 31 002b
00138278: 31 00f3 001387de: 31 007a
00138278: 31 0077 001387de: 31 00dd
00138278: 31 0022 001387de: 31 00a3
00138278: 31 0036 001387de: 31 007b
00138278: 31 002e 001387de: 31 0052
00138278: 31 00b3 001387de: 31 00e7
00138278: 31 0035 001387de: 31 00a2
00138278: 31 0041 001387de: 31 005a
00138278: 31 005d 001387de: 31 0090
00138278: 31 00d6 001387de: 31 00ee
00138278: 31 000c 001387de: 31 0025
00138278: 31 0036 001387de: 31 00b9
00138278: 31 005e 001387de: 31 00ba
00138278: 31 0089 001387de: 31 007a
00138278: 31 003c 001387de: 31 00c9
00138278: 31 007a 001387de: 31 002b
00138278: 31 00a2 001387de: 31 002b
00138278: 31 006d 001387de: 31 00c7
00138278: 31 0023 001387de: 31 00a2
00138278: 31 0037 001387de: 31 007a
00138278: 31 003f 001387de: 31 0043
00138278: 31 00b3 001387de: 31 00e7
00138278: 31 0034 001387de: 31 00a3
the first step of decoding this is clearly a xor, with the first value written being an index
into a 256 byte table..
attempting to understand this (actual values are probably wrong because our table isn't correct, especially the low bits)
it is clear the low bits of our xor table are wrong, and obvious why, it's based on the data, and a value of 0 is very rare
because the data doesn't need to store blank space! the upper bits are more trusted because they're so rarely used
00138278: 31 00fd | (set xor table offset)
UNKNOWN - related to depth / number of columns?
00138278: 31 0087 | value 87, after xor is 75 (table address,value fd,f2)
COLUMN 1
@ -767,19 +715,8 @@ void pgm_arm_type1_state::command_handler_puzzli2(int pc)
00138278: 31 0034 | value 34, after xor is 03 (table address,value 03,37) -> 0x0103
^ (end, returning 630006 as playfield width)
*/
if (command_31_write_type==2)
{
printf("%08x: %02x %04x | ",pc, m_ddp3lastcommand, m_value0);
@ -844,13 +781,13 @@ void pgm_arm_type1_state::command_handler_puzzli2(int pc)
break;
// this is read immediately after the 31 writes before a level / how to play
case 0x13: // getting some kind of list maybe?
// after writing the compressed and scrambled data stream for the level (copied from ROM) with command 0x31
// the game expects to read back a fully formed level structure from the ARM
case 0x13:
{
printf("%08x: %02x %04x (READ LEVEL DATA) | ",pc, m_ddp3lastcommand, m_value0);
// before how to play
// clearly the level layout, where does it come from?
// this is the how to play screen, correctly returned with current code
/*
UINT16 retvals[61] =
{ 0x0008, // depth (-2?)
@ -867,10 +804,10 @@ void pgm_arm_type1_state::command_handler_puzzli2(int pc)
UINT16* leveldata = &level_structure[0][0];
if (hackcount==0)
{
m_valueresponse = 0x002d0000 | ((depth>>4)+1); // this *seems* to come from upper bits of the first real value written to the device during the level stream (verify)
m_valueresponse = 0x002d0000 | ((depth>>4)+1); // this *seems* to come from upper bits of the first real value written to the device during the level stream (verify, seems wrong for some levels because you get a black bar on the bottom of the screen, but might be bad xors)
printf("level depth returning %08x\n", m_valueresponse );
}
else if (hackcount<61)
else if (hackcount<((10*numbercolumns)+1))
{
m_valueresponse = 0x002d0000 | leveldata[hackcount-1];
printf("level data returning %08x\n", m_valueresponse );