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Added 0xb4-0xb5-0xb6 command and fixed a subtle protection behaviour, game seems fully playable (although it needs some testing)

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This commit is contained in:
Angelo Salese 2010-12-15 04:22:11 +00:00
parent e6d509d7e6
commit b9a75333d6
1 changed files with 66 additions and 14 deletions
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80
src/mame/drivers/flstory.c
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@ -158,25 +158,27 @@ static ADDRESS_MAP_START( victnine_map, ADDRESS_SPACE_PROGRAM, 8 )
AM_RANGE(0xe000, 0xe7ff) AM_RAM AM_BASE_MEMBER(flstory_state, workram) /* work RAM */
ADDRESS_MAP_END
static UINT8 mcu_cmd,mcu_counter;
static UINT8 mcu_b2_res,mcu_b1_res,mcu_bb_res;
static UINT8 mcu_cmd,mcu_counter,mcu_b4_cmd;
static UINT8 mcu_b2_res,mcu_b1_res,mcu_bb_res,mcu_b5_res,mcu_b6_res;
static READ8_HANDLER( rumba_mcu_r )
{
printf("PC=%04x R %02x\n",cpu_get_pc(space->cpu),mcu_cmd);
//printf("PC=%04x R %02x\n",cpu_get_pc(space->cpu),mcu_cmd);
if((mcu_cmd & 0xf0) == 0x00) // end packet cmd, value returned is meaningless (probably used for main <-> mcu comms syncronization)
return 0;
switch(mcu_cmd)
{
case 0x00: return 0;
case 0x02: return 0; //
case 0x73: return 0xa4; //initial MCU check
case 0x33: return mcu_b2_res; //0xb2 result
case 0x31: return mcu_b1_res; //0xb1 result
case 0x04:
case 0x05: return 0;
case 0x37:
case 0x38: return 1; //0xbb result, is 1 enough for these two?
case 0x35: mcu_b5_res = 1; mcu_b6_res = 1; return 0;
case 0x36: return mcu_b4_cmd; //0xb4 command, extra protection for lives (first play only), otherwise game gives one extra life at start-up (!)
case 0x37: return mcu_b5_res; //0xb4 / 0xb5 / 0xb6 result y value
case 0x38: return mcu_b6_res; //x value
case 0x3b: return mcu_bb_res; //0xbb result
//default: printf("PC=%04x R %02x\n",cpu_get_pc(space->cpu),mcu_cmd); break;
}
@ -186,8 +188,8 @@ static READ8_HANDLER( rumba_mcu_r )
static WRITE8_HANDLER( rumba_mcu_w )
{
printf("PC=%04x W %02x\n",cpu_get_pc(space->cpu),data);
//if((mcu_cmd & 0xf0) == 0xb0)
//printf("PC=%04x W %02x %02x\n",cpu_get_pc(space->cpu),mcu_cmd,data);
if(mcu_cmd == 0xb0) // counter, used by command 0xb1 (and something else?
{
@ -228,13 +230,63 @@ static WRITE8_HANDLER( rumba_mcu_w )
if(mcu_cmd == 0xbb) // when you start a level, lives
{
/*
sends 0xbb -> param -> 0x04 (end of cmd packet?) then 0x3b for reply
*/
mcu_bb_res = data;
//printf("PC=%04x W %02x -> %02x\n",cpu_get_pc(space->cpu),mcu_cmd,data);
}
// if(mcu_cmd == 0xb4) // when the bird touches the top / bottom / left / right of the screen
// if(mcu_cmd == 0xb5)
// if(mcu_cmd == 0xb6)
if(mcu_cmd == 0xb4) // when the bird touches the top / bottom / left / right of the screen, for correct repositioning
{
mcu_b4_cmd = data;
//popmessage("%02x",mcu_b4_cmd);
/*
sends 0xb4 -> param -> 0xb5 -> param (bird X coord) -> 0xb6 -> param (bird Y coord) ->
*/
#if 0
switch(data)
{
case 1: break; // from up to down
case 2: break; // from right to left
case 4: break; // from down to up
case 8: break; // from left to right
}
#endif
}
if(mcu_cmd == 0xb5) // bird X coord
{
/* TODO: values might be off by one */
mcu_b5_res = data;
if(mcu_b4_cmd & 2) // from right to left
{
mcu_b5_res = 0x0d;
mcu_b4_cmd = 0; // note: 0xb5 seems to have priority over 0xb6? It sometimes triggers this with bit 0 enabled too?
}
if(mcu_b4_cmd & 8) // from left to right
{
mcu_b5_res = 0xe4;
mcu_b4_cmd = 0; // note: 0xb5 seems to have priority over 0xb6?
}
}
if(mcu_cmd == 0xb6) // bird Y coord
{
mcu_b6_res = data;
if(mcu_b4_cmd & 1) // from up to down
mcu_b6_res = 0x04;
if(mcu_b4_cmd & 4) // from down to up
mcu_b6_res = 0xdc;
}
if(mcu_cmd == 0xb3)
printf("PC=%04x W %02x -> %02x\n",cpu_get_pc(space->cpu),mcu_cmd,data);