Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-07-02 00:29:37 +03:00
Code Issues Actions Packages Projects Releases Wiki Activity

315_5124: Adjust horizontal screen positions

Browse Source
This commit is contained in:
Enik Land 2019-07-25 23:03:44 -03:00
parent d8754b3a5f
commit 1018a623e4
4 changed files with 24 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
src/devices/bus/sega8/sega8_slot.cpp
View File

@ -302,17 +302,17 @@ void sega8_cart_slot_device::set_lphaser_xoffset( uint8_t *rom, int size )
if (size >= 0x8000) if (size >= 0x8000)
{ {
if (!memcmp(&rom[0x7ff0], signatures[0], 16) || !memcmp(&rom[0x7ff0], signatures[1], 16)) if (!memcmp(&rom[0x7ff0], signatures[0], 16) || !memcmp(&rom[0x7ff0], signatures[1], 16))
xoff = 26; xoff = 9;
else if (!memcmp(&rom[0x7ff0], signatures[2], 16)) else if (!memcmp(&rom[0x7ff0], signatures[2], 16))
xoff = 36; xoff = 19;
else if (!memcmp(&rom[0x7ff0], signatures[3], 16)) else if (!memcmp(&rom[0x7ff0], signatures[3], 16))
xoff = 32; xoff = 15;
else if (!memcmp(&rom[0x7ff0], signatures[4], 16)) else if (!memcmp(&rom[0x7ff0], signatures[4], 16))
xoff = 30; xoff = 13;
else if (!memcmp(&rom[0x7ff0], signatures[5], 16)) else if (!memcmp(&rom[0x7ff0], signatures[5], 16))
xoff = 39; xoff = 22;
else if (!memcmp(&rom[0x7ff0], signatures[6], 16)) else if (!memcmp(&rom[0x7ff0], signatures[6], 16))
xoff = 38; xoff = 21;
} }
m_cart->set_lphaser_xoffs(xoff); m_cart->set_lphaser_xoffs(xoff);

35
src/devices/video/315_5124.cpp
View File

@ -24,23 +24,22 @@ SMS Display Timing
------------------ ------------------
For more information, please see: For more information, please see:
- http://cgfm2.emuviews.com/txt/msvdp.txt - http://cgfm2.emuviews.com/txt/msvdp.txt
- http://www.smspower.org/forums/viewtopic.php?p=44198 - http://www.smspower.org/forums/viewtopic.php?p=37142
- http://www.smspower.org/forums/viewtopic.php?p=92925
A scanline contains the following sections: A scanline contains the following sections:
- horizontal sync 9 E9-ED => HSYNC high - horizontal sync 26 E9-F5 => HSYNC low
- left blanking 2 ED-EE - left blanking 2 F6-F6 => HSYNC high
- color burst 14 EE-F5 => increment line counter/generate interrupts/etc - color burst 14 F7-FD
- left blanking 8 F5-F9 - left blanking 8 FE-01
- left border 13 F9-FF - left border 13 02-08
- active display 256 00-7F - active display 256 08-88
- right border 15 80-87 - right border 15 88-8F
- right blanking 8 87-8B - right blanking 8 90-93
- horizontal sync 17 8B-93 => HSYNC low
Although the processing done for a section happens when HCount is in the Probably the processing done for the active display occurs when HCount
specified range (e.g. 00-7F for active display), probably there is a delay is in the 00-7F range and there is a delay until its signal is shown on
until its signal is shown on screen, as happens on the TMS9918 chip screen, as happens on the TMS9918 chip according to this timing diagram:
according to this timing diagram:
http://www.smspower.org/Development/TMS9918MasterTimingDiagram http://www.smspower.org/Development/TMS9918MasterTimingDiagram
@ -110,8 +109,8 @@ static constexpr u8 line_315_5377[8] = { 26, 26, 27, 28 /* not verified */, 24,
#define DISPLAY_DISABLED_HPOS 24 /* not verified, works if above 18 (for 'pstrike2') and below 25 (for 'fantdizzy') */ #define DISPLAY_DISABLED_HPOS 24 /* not verified, works if above 18 (for 'pstrike2') and below 25 (for 'fantdizzy') */
#define DISPLAY_CB_HPOS 2 /* fixes 'roadrash' (SMS game) title scrolling, due to line counter reload timing */ #define DISPLAY_CB_HPOS 2 /* fixes 'roadrash' (SMS game) title scrolling, due to line counter reload timing */
#define DRAW_TIME_GG 94 /* 9 + 2 + 14 + 8 + 13 + 96/2 */ #define DRAW_TIME_GG 111 /* 26 + 2 + 14 + 8 + 13 + 96/2 */
#define DRAW_TIME_SMS 46 /* 9 + 2 + 14 + 8 + 13 */ #define DRAW_TIME_SMS 63 /* 26 + 2 + 14 + 8 + 13 */
DEFINE_DEVICE_TYPE(SEGA315_5124, sega315_5124_device, "sega315_5124", "Sega 315-5124 SMS1 VDP") DEFINE_DEVICE_TYPE(SEGA315_5124, sega315_5124_device, "sega315_5124", "Sega 315-5124 SMS1 VDP")
@ -382,14 +381,12 @@ u8 sega315_5124_device::hcount_read()
void sega315_5124_device::hcount_latch() void sega315_5124_device::hcount_latch()
{ {
const int active_scr_start = 46; /* 9 + 2 + 14 + 8 + 13 */
/* The hcount value returned by the VDP seems to be based on the previous hpos */ /* The hcount value returned by the VDP seems to be based on the previous hpos */
int hclock = screen().hpos() - 1; int hclock = screen().hpos() - 1;
if (hclock < 0) if (hclock < 0)
hclock += WIDTH; hclock += WIDTH;
m_hcounter = ((hclock - active_scr_start) >> 1) & 0xff; m_hcounter = ((hclock - 46) >> 1) & 0xff;
m_hcounter_latched = true; m_hcounter_latched = true;
} }

2
src/devices/video/315_5124.h
View File

@ -36,7 +36,7 @@ public:
static constexpr unsigned WIDTH = 342; /* 342 pixels */ static constexpr unsigned WIDTH = 342; /* 342 pixels */
static constexpr unsigned HEIGHT_NTSC = 262; /* 262 lines */ static constexpr unsigned HEIGHT_NTSC = 262; /* 262 lines */
static constexpr unsigned HEIGHT_PAL = 313; /* 313 lines */ static constexpr unsigned HEIGHT_PAL = 313; /* 313 lines */
static constexpr unsigned LBORDER_START = 9 + 2 + 14 + 8; static constexpr unsigned LBORDER_START = 26 + 2 + 14 + 8;
static constexpr unsigned LBORDER_WIDTH = 13; /* 13 pixels */ static constexpr unsigned LBORDER_WIDTH = 13; /* 13 pixels */
static constexpr unsigned RBORDER_WIDTH = 15; /* 15 pixels */ static constexpr unsigned RBORDER_WIDTH = 15; /* 15 pixels */
static constexpr unsigned TBORDER_START = 3 + 13; static constexpr unsigned TBORDER_START = 3 + 13;

2
src/mame/machine/sms.cpp
View File

@ -974,7 +974,7 @@ void sms_state::setup_media_slots()
m_lphaser_x_offs = m_smsexpslot->get_lphaser_xoffs(); m_lphaser_x_offs = m_smsexpslot->get_lphaser_xoffs();
if (m_lphaser_x_offs == -1) if (m_lphaser_x_offs == -1)
m_lphaser_x_offs = 36; m_lphaser_x_offs = 19;
} }
} }