Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-04-25 09:50:04 +03:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

hooked the color prom up

Browse Source
This commit is contained in:
Michaël Banaan Ananas 2012-04-27 19:16:34 +00:00
parent a1f51d891b
commit 4c2884bfee
1 changed files with 54 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

56
src/mame/drivers/meyc8088.c
View File

@ -20,8 +20,9 @@
#include "emu.h"
#include "cpu/i86/i86.h"
#include "machine/i8155.h"
#include "sound/dac.h"
#include "machine/nvram.h"
#include "sound/dac.h"
#include "video/resnet.h"
class meyc8088_state : public driver_device
{
@ -52,6 +53,56 @@ public:
***************************************************************************/
/***************************************************************************
Convert the color PROMs into a more useable format.
The palette PROM is connected to the RGB output this way:
(even and uneven pins were switched around in the schematics)
bit 7 -- N/C
-- 820 ohm resistor -- GREEN
-- -- GREEN
-- 820 ohm resistor -- BLUE
-- -- BLUE
-- 820 ohm resistor -- RED
-- -- RED
bit 0 -- N/C
plus 330 ohm pullup resistors on all lines
***************************************************************************/
static const res_net_decode_info meyc8088_decode_info =
{
1, // there may be two proms needed to construct color
0, 31, // start/end
// R, G, B,
{ 0, 0, 0, }, // offsets
{ 1, 5, 3, }, // shifts
{0x03,0x03,0x03, } // masks
};
static const res_net_info meyc8088_net_info =
{
RES_NET_VCC_5V | RES_NET_VBIAS_5V | RES_NET_VIN_OPEN_COL,
{
{ RES_NET_AMP_NONE, 330, 0, 2, { 1, 820 } },
{ RES_NET_AMP_NONE, 330, 0, 2, { 1, 820 } },
{ RES_NET_AMP_NONE, 330, 0, 2, { 1, 820 } }
}
};
PALETTE_INIT( meyc8088 )
{
const UINT8 *color_prom = machine.root_device().memregion("proms")->base();
rgb_t *rgb;
rgb = compute_res_net_all(machine, color_prom, &meyc8088_decode_info, &meyc8088_net_info);
palette_set_colors(machine, 0, rgb, 32);
auto_free(machine, rgb);
}
static SCREEN_UPDATE_IND16( meyc8088 )
{
meyc8088_state *state = screen.machine().driver_data<meyc8088_state>();
@ -315,6 +366,7 @@ static MACHINE_CONFIG_START( meyc8088, meyc8088_state )
MCFG_SCREEN_VBLANK_STATIC(meyc8088)
MCFG_PALETTE_LENGTH(32)
MCFG_PALETTE_INIT(meyc8088)
/* sound hardware */
MCFG_SPEAKER_STANDARD_MONO("mono")
@ -335,4 +387,4 @@ ROM_START( gldarrow )
ROM_END
GAME( 1984, gldarrow, 0, meyc8088, gldarrow, 0, ROT0, "Meyco Games, Inc.", "Golden Arrow (Standard G8-03)", GAME_NOT_WORKING | GAME_WRONG_COLORS )
GAME( 1984, gldarrow, 0, meyc8088, gldarrow, 0, ROT0, "Meyco Games, Inc.", "Golden Arrow (Standard G8-03)", GAME_NOT_WORKING )