//NOTE: These arbitrary cutoffs are NOT taken into account for PAL jaguar screens. !!! FIX !!!
// Arbitrary video cutoff values (i.e., first/last visible spots on a TV, in HC ticks)
-/*#define LEFT_VISIBLE_HC 208
-#define RIGHT_VISIBLE_HC 1528//*/
-#define LEFT_VISIBLE_HC 208
-#define RIGHT_VISIBLE_HC 1488
+/*#define LEFT_VISIBLE_HC 208
+#define RIGHT_VISIBLE_HC 1528//*/
+#define LEFT_VISIBLE_HC 208
+#define RIGHT_VISIBLE_HC 1488
//#define TOP_VISIBLE_VC 25
-//#define BOTTOM_VISIBLE_VC 503
-#define TOP_VISIBLE_VC 31
-#define BOTTOM_VISIBLE_VC 511
+//#define BOTTOM_VISIBLE_VC 503
+#define TOP_VISIBLE_VC 31
+#define BOTTOM_VISIBLE_VC 511
+
+//Are these PAL horizontals correct?
+//They seem to be for the most part, but there are some games that seem to be
+//shifted over to the right from this "window".
+#define LEFT_VISIBLE_HC_PAL 208
+#define RIGHT_VISIBLE_HC_PAL 1488
+#define TOP_VISIBLE_VC_PAL 67
+#define BOTTOM_VISIBLE_VC_PAL 579
//This can be defined in the makefile as well...
//(It's easier to do it here, though...)
//#define TOM_DEBUG
-extern uint32 jaguar_mainRom_crc32;
extern uint8 objectp_running;
static uint8 * tom_ram_8;
uint16 tom_jerry_int_pending, tom_timer_int_pending, tom_object_int_pending,
tom_gpu_int_pending, tom_video_int_pending;
uint16 * tom_cry_rgb_mix_lut;
-int16 * TOMBackbuffer;
+//int16 * TOMBackbuffer;
+uint32 * TOMBackbuffer;
static char * videoMode_to_str[8] =
{ "16 BPP CRY", "24 BPP RGB", "16 BPP DIRECT", "16 BPP RGB",
"Mixed mode", "24 BPP RGB", "16 BPP DIRECT", "16 BPP RGB" };
-typedef void (render_xxx_scanline_fn)(int16 *);
+typedef void (render_xxx_scanline_fn)(uint32 *);
// Private function prototypes
-void tom_render_16bpp_cry_scanline(int16 * backbuffer);
-void tom_render_24bpp_scanline(int16 * backbuffer);
-void tom_render_16bpp_direct_scanline(int16 * backbuffer);
-void tom_render_16bpp_rgb_scanline(int16 * backbuffer);
-void tom_render_16bpp_cry_rgb_mix_scanline(int16 * backbuffer);
+void tom_render_16bpp_cry_scanline(uint32 * backbuffer);
+void tom_render_24bpp_scanline(uint32 * backbuffer);
+void tom_render_16bpp_direct_scanline(uint32 * backbuffer);
+void tom_render_16bpp_rgb_scanline(uint32 * backbuffer);
+void tom_render_16bpp_cry_rgb_mix_scanline(uint32 * backbuffer);
-void tom_render_16bpp_cry_stretch_scanline(int16 * backbuffer);
-void tom_render_24bpp_stretch_scanline(int16 * backbuffer);
-void tom_render_16bpp_direct_stretch_scanline(int16 * backbuffer);
-void tom_render_16bpp_rgb_stretch_scanline(int16 * backbuffer);
-void tom_render_16bpp_cry_rgb_mix_stretch_scanline(int16 * backbuffer);
+void tom_render_16bpp_cry_stretch_scanline(uint32 * backbuffer);
+void tom_render_24bpp_stretch_scanline(uint32 * backbuffer);
+void tom_render_16bpp_direct_stretch_scanline(uint32 * backbuffer);
+void tom_render_16bpp_rgb_stretch_scanline(uint32 * backbuffer);
+void tom_render_16bpp_cry_rgb_mix_stretch_scanline(uint32 * backbuffer);
render_xxx_scanline_fn * scanline_render_normal[]=
{
render_xxx_scanline_fn * scanline_render[8];
+// Screen info for various games [PAL]...
+/*
+BIOS
+TOM: Horizontal Period written by M68K: 850 (+1*2 = 1702)
+TOM: Horizontal Blank Begin written by M68K: 1711
+TOM: Horizontal Blank End written by M68K: 158
+TOM: Horizontal Display End written by M68K: 1696
+TOM: Horizontal Display Begin 1 written by M68K: 166
+TOM: Vertical Period written by M68K: 623 (non-interlaced)
+TOM: Vertical Blank End written by M68K: 34
+TOM: Vertical Display Begin written by M68K: 46
+TOM: Vertical Display End written by M68K: 526
+TOM: Vertical Blank Begin written by M68K: 600
+TOM: Vertical Sync written by M68K: 618
+TOM: Horizontal Display End written by M68K: 1665
+TOM: Horizontal Display Begin 1 written by M68K: 203
+TOM: Vertical Display Begin written by M68K: 38
+TOM: Vertical Display End written by M68K: 518
+TOM: Video Mode written by M68K: 06C1. PWIDTH = 4, MODE = 16 BPP CRY, flags: BGEN (VC = 151)
+TOM: Horizontal Display End written by M68K: 1713
+TOM: Horizontal Display Begin 1 written by M68K: 157
+TOM: Vertical Display Begin written by M68K: 35
+TOM: Vertical Display End written by M68K: 2047
+Horizontal range: 157 - 1713 (width: 1557 / 4 = 389.25, / 5 = 315.4)
+
+Asteroid
+TOM: Horizontal Period written by M68K: 845 (+1*2 = 1692)
+TOM: Horizontal Blank Begin written by M68K: 1700
+TOM: Horizontal Blank End written by M68K: 122
+TOM: Horizontal Display End written by M68K: 1600
+TOM: Horizontal Display Begin 1 written by M68K: 268
+TOM: Vertical Period written by M68K: 523 (non-interlaced)
+TOM: Vertical Blank End written by M68K: 40
+TOM: Vertical Display Begin written by M68K: 44
+TOM: Vertical Display End written by M68K: 492
+TOM: Vertical Blank Begin written by M68K: 532
+TOM: Vertical Sync written by M68K: 513
+TOM: Video Mode written by M68K: 04C7. PWIDTH = 3, MODE = 16 BPP RGB, flags: BGEN (VC = 461)
+
+Rayman
+TOM: Horizontal Display End written by M68K: 1713
+TOM: Horizontal Display Begin 1 written by M68K: 157
+TOM: Vertical Display Begin written by M68K: 35
+TOM: Vertical Display End written by M68K: 2047
+TOM: Video Mode written by M68K: 06C7. PWIDTH = 4, MODE = 16 BPP RGB, flags: BGEN (VC = 89)
+TOM: Horizontal Display Begin 1 written by M68K: 208
+TOM: Horizontal Display End written by M68K: 1662
+TOM: Vertical Display Begin written by M68K: 100
+TOM: Vertical Display End written by M68K: 2047
+TOM: Video Mode written by M68K: 07C7. PWIDTH = 4, MODE = 16 BPP RGB, flags: BGEN VARMOD (VC = 205)
+Horizontal range: 208 - 1662 (width: 1455 / 4 = 363.5)
+
+Alien vs Predator
+TOM: Vertical Display Begin written by M68K: 96
+TOM: Vertical Display End written by M68K: 2047
+TOM: Horizontal Display Begin 1 written by M68K: 239
+TOM: Horizontal Display End written by M68K: 1692
+TOM: Video Mode written by M68K: 06C1. PWIDTH = 4, MODE = 16 BPP CRY, flags: BGEN (VC = 378)
+TOM: Vertical Display Begin written by M68K: 44
+TOM: Vertical Display End written by M68K: 2047
+TOM: Horizontal Display Begin 1 written by M68K: 239
+TOM: Horizontal Display End written by M68K: 1692
+TOM: Video Mode written by M68K: 06C7. PWIDTH = 4, MODE = 16 BPP RGB, flags: BGEN (VC = 559)
+TOM: Vertical Display Begin written by M68K: 84
+TOM: Vertical Display End written by M68K: 2047
+TOM: Horizontal Display Begin 1 written by M68K: 239
+TOM: Horizontal Display End written by M68K: 1692
+TOM: Vertical Display Begin written by M68K: 44
+TOM: Vertical Display End written by M68K: 2047
+TOM: Horizontal Display Begin 1 written by M68K: 239
+TOM: Horizontal Display End written by M68K: 1692
+Horizontal range: 239 - 1692 (width: 1454 / 4 = 363.5)
+
+*/
+
// Screen info for various games [NTSC]...
/*
Doom
Vertical resolution: 238 lines
*/
+uint32 RGB16ToRGB32[0x10000];
+uint32 CRY16ToRGB32[0x10000];
+uint32 MIX16ToRGB32[0x10000];
+
+void TOMFillLookupTables(void)
+{
+ for(uint32 i=0; i<0x10000; i++)
+ RGB16ToRGB32[i] = 0xFF000000
+ | ((i & 0xF100) >> 8) | ((i & 0xE000) >> 13)
+ | ((i & 0x07C0) << 13) | ((i & 0x0700) << 8)
+ | ((i & 0x003F) << 10) | ((i & 0x0030) << 4);
+
+
+ for(uint32 i=0; i<0x10000; i++)
+ {
+ uint32 chrm = (i & 0xF000) >> 12,
+ chrl = (i & 0x0F00) >> 8,
+ y = (i & 0x00FF);
+
+ uint32 r = (((uint32)redcv[chrm][chrl]) * y) >> 8,
+ g = (((uint32)greencv[chrm][chrl]) * y) >> 8,
+ b = (((uint32)bluecv[chrm][chrl]) * y) >> 8;
+
+ CRY16ToRGB32[i] = 0xFF000000 | (b << 16) | (g << 8) | r;
+ MIX16ToRGB32[i] = CRY16ToRGB32[i];
+ }
-void tom_calc_cry_rgb_mix_lut(void)
+ for(uint32 i=0; i<0x10000; i++)
+ if (i & 0x01)
+ MIX16ToRGB32[i] = RGB16ToRGB32[i];
+}
+
+/*void tom_calc_cry_rgb_mix_lut(void)
{
for (uint32 i=0; i<0x10000; i++)
{
tom_cry_rgb_mix_lut[i] = color;
}
-}
+}*/
void tom_set_pending_jerry_int(void)
{
//
// 16 BPP CRY/RGB mixed mode rendering
//
-void tom_render_16bpp_cry_rgb_mix_scanline(int16 * backbuffer)
+void tom_render_16bpp_cry_rgb_mix_scanline(uint32 * backbuffer)
{
+//CHANGED TO 32BPP RENDERING
uint16 width = tom_width;
uint8 * current_line_buffer = (uint8 *)&tom_ram_8[0x1800];
//New stuff--restrict our drawing...
uint8 pwidth = ((GET16(tom_ram_8, VMODE) & PWIDTH) >> 9) + 1;
//NOTE: May have to check HDB2 as well!
- int16 startPos = GET16(tom_ram_8, HDB1) - LEFT_VISIBLE_HC; // Get start position in HC ticks
+ // Get start position in HC ticks
+ int16 startPos = GET16(tom_ram_8, HDB1) - (vjs.hardwareTypeNTSC ? LEFT_VISIBLE_HC : LEFT_VISIBLE_HC_PAL);
startPos /= pwidth;
if (startPos < 0)
current_line_buffer += 2 * -startPos;
else
+//This case doesn't properly handle the "start on the right side of virtual screen" case
+//Dunno why--looks Ok...
+//What *is* for sure wrong is that it doesn't copy the linebuffer's BG pixels...
+//This should likely be 4 instead of 2 (?--not sure)
backbuffer += 2 * startPos, width -= startPos;
while (width)
{
uint16 color = (*current_line_buffer++) << 8;
color |= *current_line_buffer++;
- *backbuffer++ = tom_cry_rgb_mix_lut[color];
+// *backbuffer++ = tom_cry_rgb_mix_lut[color];
+ *backbuffer++ = MIX16ToRGB32[color];
width--;
}
}
//
// 16 BPP CRY mode rendering
//
-void tom_render_16bpp_cry_scanline(int16 * backbuffer)
+void tom_render_16bpp_cry_scanline(uint32 * backbuffer)
{
+//CHANGED TO 32BPP RENDERING
uint16 width = tom_width;
uint8 * current_line_buffer = (uint8 *)&tom_ram_8[0x1800];
//New stuff--restrict our drawing...
uint8 pwidth = ((GET16(tom_ram_8, VMODE) & PWIDTH) >> 9) + 1;
//NOTE: May have to check HDB2 as well!
- int16 startPos = GET16(tom_ram_8, HDB1) - LEFT_VISIBLE_HC; // Get start position in HC ticks
+ int16 startPos = GET16(tom_ram_8, HDB1) - (vjs.hardwareTypeNTSC ? LEFT_VISIBLE_HC : LEFT_VISIBLE_HC_PAL);// Get start position in HC ticks
startPos /= pwidth;
if (startPos < 0)
current_line_buffer += 2 * -startPos;
else
+//This should likely be 4 instead of 2 (?--not sure)
backbuffer += 2 * startPos, width -= startPos;
while (width)
{
uint16 color = (*current_line_buffer++) << 8;
color |= *current_line_buffer++;
-
- uint32 chrm = (color & 0xF000) >> 12,
- chrl = (color & 0x0F00) >> 8,
- y = (color & 0x00FF);
-
- uint16 red = (((uint32)redcv[chrm][chrl]) * y) >> 11,
- green = (((uint32)greencv[chrm][chrl]) * y) >> 11,
- blue = (((uint32)bluecv[chrm][chrl]) * y) >> 11;
-
- *backbuffer++ = (red << 10) | (green << 5) | blue;
+ *backbuffer++ = CRY16ToRGB32[color];
width--;
}
}
//
// 24 BPP mode rendering
//
-void tom_render_24bpp_scanline(int16 * backbuffer)
+void tom_render_24bpp_scanline(uint32 * backbuffer)
{
+//CHANGED TO 32BPP RENDERING
uint16 width = tom_width;
uint8 * current_line_buffer = (uint8 *)&tom_ram_8[0x1800];
//New stuff--restrict our drawing...
uint8 pwidth = ((GET16(tom_ram_8, VMODE) & PWIDTH) >> 9) + 1;
//NOTE: May have to check HDB2 as well!
- int16 startPos = GET16(tom_ram_8, HDB1) - LEFT_VISIBLE_HC; // Get start position in HC ticks
+ int16 startPos = GET16(tom_ram_8, HDB1) - (vjs.hardwareTypeNTSC ? LEFT_VISIBLE_HC : LEFT_VISIBLE_HC_PAL); // Get start position in HC ticks
startPos /= pwidth;
if (startPos < 0)
current_line_buffer += 4 * -startPos;
else
+//This should likely be 4 instead of 2 (?--not sure)
backbuffer += 2 * startPos, width -= startPos;
while (width)
{
- // This is NOT a good 8 -> 5 bit RGB conversion! (It saturates values below 8
- // to zero and throws away almost *half* the color resolution!)
- uint16 green = (*current_line_buffer++) >> 3;
- uint16 red = (*current_line_buffer++) >> 3;
+ uint32 g = *current_line_buffer++;
+ uint32 r = *current_line_buffer++;
current_line_buffer++;
- uint16 blue = (*current_line_buffer++) >> 3;
- *backbuffer++ = (red << 10) | (green << 5) | blue;
+ uint32 b = *current_line_buffer++;
+ *backbuffer++ = 0xFF000000 | (b << 16) | (g << 8) | r;
width--;
}
}
//
// 16 BPP direct mode rendering
//
-void tom_render_16bpp_direct_scanline(int16 * backbuffer)
+void tom_render_16bpp_direct_scanline(uint32 * backbuffer)
{
uint16 width = tom_width;
uint8 * current_line_buffer = (uint8 *)&tom_ram_8[0x1800];
//
// 16 BPP RGB mode rendering
//
-void tom_render_16bpp_rgb_scanline(int16 * backbuffer)
+void tom_render_16bpp_rgb_scanline(uint32 * backbuffer)
{
+//CHANGED TO 32BPP RENDERING
+ // 16 BPP RGB: 0-5 green, 6-10 blue, 11-15 red
+
uint16 width = tom_width;
uint8 * current_line_buffer = (uint8 *)&tom_ram_8[0x1800];
//New stuff--restrict our drawing...
uint8 pwidth = ((GET16(tom_ram_8, VMODE) & PWIDTH) >> 9) + 1;
//NOTE: May have to check HDB2 as well!
- int16 startPos = GET16(tom_ram_8, HDB1) - LEFT_VISIBLE_HC; // Get start position in HC ticks
+ int16 startPos = GET16(tom_ram_8, HDB1) - (vjs.hardwareTypeNTSC ? LEFT_VISIBLE_HC : LEFT_VISIBLE_HC_PAL); // Get start position in HC ticks
startPos /= pwidth;
+
if (startPos < 0)
current_line_buffer += 2 * -startPos;
else
+//This should likely be 4 instead of 2 (?--not sure)
backbuffer += 2 * startPos, width -= startPos;
while (width)
{
- uint16 color = (*current_line_buffer++) << 8;
- color = (color | *current_line_buffer++) >> 1;
- color = (color&0x7C00) | ((color&0x03E0) >> 5) | ((color&0x001F) << 5);
- *backbuffer++ = color;
+ uint32 color = (*current_line_buffer++) << 8;
+ color |= *current_line_buffer++;
+ *backbuffer++ = RGB16ToRGB32[color];
width--;
}
}
-// This stuff may just go away by itself, especially if we do some
-// good old OpenGL goodness...
+/////////////////////////////////////////////////////////////////////
+// This stuff may just go away by itself, especially if we do some //
+// good old OpenGL goodness... //
+/////////////////////////////////////////////////////////////////////
-void tom_render_16bpp_cry_rgb_mix_stretch_scanline(int16 *backbuffer)
+void tom_render_16bpp_cry_rgb_mix_stretch_scanline(uint32 *backbuffer)
{
uint16 width=tom_width;
uint8 *current_line_buffer=(uint8*)&tom_ram_8[0x1800];
}
}
-void tom_render_16bpp_cry_stretch_scanline(int16 *backbuffer)
+void tom_render_16bpp_cry_stretch_scanline(uint32 *backbuffer)
{
uint32 chrm, chrl, y;
}
}
-void tom_render_24bpp_stretch_scanline(int16 *backbuffer)
+void tom_render_24bpp_stretch_scanline(uint32 *backbuffer)
{
uint16 width=tom_width;
uint8 *current_line_buffer=(uint8*)&tom_ram_8[0x1800];
}
}
-void tom_render_16bpp_direct_stretch_scanline(int16 *backbuffer)
+void tom_render_16bpp_direct_stretch_scanline(uint32 *backbuffer)
{
uint16 width=tom_width;
uint8 *current_line_buffer=(uint8*)&tom_ram_8[0x1800];
}
}
-void tom_render_16bpp_rgb_stretch_scanline(int16 *backbuffer)
+void tom_render_16bpp_rgb_stretch_scanline(uint32 *backbuffer)
{
uint16 width=tom_width;
uint8 *current_line_buffer=(uint8*)&tom_ram_8[0x1800];
}
}
-void TOMResetBackbuffer(int16 * backbuffer)
+void TOMResetBackbuffer(uint32 * backbuffer)
{
TOMBackbuffer = backbuffer;
}
else
inActiveDisplayArea = false;
+//Try to take PAL into account...
+uint16 topVisible = (vjs.hardwareTypeNTSC ? TOP_VISIBLE_VC : TOP_VISIBLE_VC_PAL),
+ bottomVisible = (vjs.hardwareTypeNTSC ? BOTTOM_VISIBLE_VC : BOTTOM_VISIBLE_VC_PAL);
// Here's our virtualized scanline code...
- if (scanline >= TOP_VISIBLE_VC && scanline < BOTTOM_VISIBLE_VC)
+ if (scanline >= topVisible && scanline < bottomVisible)
{
if (inActiveDisplayArea)
scanline_render[tom_getVideoMode()](TOMBackbuffer);
else
{
// If outside of VDB & VDE, then display the border color
- int16 * currentLineBuffer = TOMBackbuffer;
+/* int16 * currentLineBuffer = TOMBackbuffer;
uint8 g = tom_ram_8[BORD1], r = tom_ram_8[BORD1 + 1], b = tom_ram_8[BORD2 + 1];
- uint16 pixel = ((r & 0xF8) << 7) | ((g & 0xF8) << 2) | (b >> 3);
+ uint16 pixel = ((r & 0xF8) << 7) | ((g & 0xF8) << 2) | (b >> 3);//*/
+ uint32 * currentLineBuffer = TOMBackbuffer;
+ uint8 g = tom_ram_8[BORD1], r = tom_ram_8[BORD1 + 1], b = tom_ram_8[BORD2 + 1];
+ uint32 pixel = 0xFF000000 | (b << 16) | (g << 8) | r;
for(uint32 i=0; i<tom_width; i++)
*currentLineBuffer++ = pixel;
}
- TOMBackbuffer += GetSDLScreenPitch() / 2; // Returns bytes, but we need words
+// TOMBackbuffer += GetSDLScreenPitch() / 2; // Returns bytes, but we need words
+ TOMBackbuffer += GetSDLScreenPitch() / 4; // Returns bytes, but we need dwords
}
}
tom_reset();
// Setup the non-stretchy scanline rendering...
memcpy(scanline_render, scanline_render_normal, sizeof(scanline_render));
- tom_calc_cry_rgb_mix_lut();
+// tom_calc_cry_rgb_mix_lut();
+ TOMFillLookupTables();
}
void tom_done(void)
// To make it easier to make a quasi-fixed display size, we restrict the viewing
// area to an arbitrary range of the Horizontal Count.
uint16 pwidth = ((GET16(tom_ram_8, VMODE) & PWIDTH) >> 9) + 1;
- return (RIGHT_VISIBLE_HC - LEFT_VISIBLE_HC) / pwidth;
+ return (vjs.hardwareTypeNTSC ? RIGHT_VISIBLE_HC - LEFT_VISIBLE_HC : RIGHT_VISIBLE_HC_PAL - LEFT_VISIBLE_HC_PAL) / pwidth;
//Temporary, for testing Doom...
// return (RIGHT_VISIBLE_HC - LEFT_VISIBLE_HC) / (pwidth == 8 ? 4 : pwidth);
//// return (RIGHT_VISIBLE_HC - LEFT_VISIBLE_HC) / (pwidth == 4 ? 8 : pwidth);
tom_gpu_int_pending = 0;
tom_video_int_pending = 0;
- tom_timer_prescaler = 0;
+ tom_timer_prescaler = 0; // TOM PIT is disabled
tom_timer_divider = 0;
tom_timer_counter = 0;
memcpy(scanline_render, scanline_render_normal, sizeof(scanline_render));
void TOMResetPIT(void)
{
- if (!tom_timer_prescaler || !tom_timer_divider)
- tom_timer_counter = 0;
- else
-//Probably should *add* this amount to the counter to retain cycle accuracy! !!! FIX !!!
-//Also, why +1???
- tom_timer_counter = (1 + tom_timer_prescaler) * (1 + tom_timer_divider);
+//Probably should *add* this amount to the counter to retain cycle accuracy! !!! FIX !!! [DONE]
+//Also, why +1??? 'Cause that's what it says in the JTRM...!
+//There is a small problem with this approach: If both the prescaler and the divider are equal
+//to $FFFF then the counter won't be large enough to handle it. !!! FIX !!!
+ if (tom_timer_prescaler)
+ tom_timer_counter += (1 + tom_timer_prescaler) * (1 + tom_timer_divider);
// WriteLog("tom: reseting timer to 0x%.8x (%i)\n",tom_timer_counter,tom_timer_counter);
}
//
// TOM Programmable Interrupt Timer handler
+// NOTE: TOM's PIT is only enabled if the prescaler is != 0
//
void TOMExecPIT(uint32 cycles)
{
- if (tom_timer_counter > 0)
+ if (tom_timer_prescaler)
{
tom_timer_counter -= cycles;
if (tom_timer_counter <= 0)
{
tom_set_pending_timer_int();
- GPUSetIRQLine(GPUIRQ_TIMER, ASSERT_LINE);
- if (tom_irq_enabled(IRQ_TIMER) && jaguar_interrupt_handler_is_valid(64))
- m68k_set_irq(7); // Cause a 68000 NMI...
+ GPUSetIRQLine(GPUIRQ_TIMER, ASSERT_LINE); // GPUSetIRQLine does the 'IRQ enabled' checking
+ if (tom_irq_enabled(IRQ_TIMER))//get rid of this crap -> && jaguar_interrupt_handler_is_valid(64))
+ m68k_set_irq(7); // Cause a 68000 NMI...
TOMResetPIT();
}
projects / virtualjaguar / blobdiff