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Merge pull request #363 from Happy-yappH/master

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Fix reversion for PI.  PI transfers round length up, not down.
This commit is contained in:
R. Belmont 2015-10-05 14:38:11 -04:00
commit 3a7d1c6714
3 changed files with 13 additions and 7 deletions
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1
src/mame/includes/n64.h
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@ -117,6 +117,7 @@ public:
UINT32 vi_leap;
UINT32 vi_intr;
UINT32 vi_vburst;
UINT8 field;
/* nvram-specific for MESS */
device_t *m_nvram_image;

10
src/mame/machine/n64.c
View File

@ -1057,10 +1057,6 @@ void n64_periphs::vi_recalculate_resolution()
if (height > 480)
height = 480;
if(vi_control & 0x40) /* Interlace */
{
}
visarea.max_x = width - 1;
visarea.max_y = height - 1;
m_screen->configure((vi_hsync & 0x00000fff)>>2, (vi_vsync & 0x00000fff), visarea, period);
@ -1088,7 +1084,7 @@ READ32_MEMBER( n64_periphs::vi_reg_r )
break;
case 0x10/4: // VI_CURRENT_REG
ret = (m_screen->vpos() & 0x3FE); // << 1);
ret = (m_screen->vpos() & 0x3FE) + field; // << 1);
break;
case 0x14/4: // VI_BURST_REG
@ -1461,7 +1457,7 @@ void n64_periphs::pi_dma_tick()
if(pi_dma_dir == 1)
{
UINT32 dma_length = pi_wr_len + 1;
UINT32 dma_length = pi_wr_len + 1 + 1; //Round Up Nearest 2
//logerror("PI Write, %X, %X, %X\n", pi_cart_addr, pi_dram_addr, pi_wr_len);
if (pi_dram_addr != 0xffffffff)
@ -1477,7 +1473,7 @@ void n64_periphs::pi_dma_tick()
}
else
{
UINT32 dma_length = pi_rd_len + 1;
UINT32 dma_length = pi_rd_len + 1 + 1; //Round Up Nearest 2
//logerror("PI Read, %X, %X, %X\n", pi_cart_addr, pi_dram_addr, pi_rd_len);
if (pi_dram_addr != 0xffffffff)

9
src/mame/video/n64.c
View File

@ -168,6 +168,15 @@ void n64_state::screen_eof_n64(screen_device &screen, bool state)
void n64_periphs::video_update(bitmap_rgb32 &bitmap)
{
if(vi_control & 0x40) /* Interlace */
{
field ^= 1;
}
else
{
field = 1;
}
switch(vi_control & 0x3)
{
case PIXEL_SIZE_16BIT: