diff options
| author | 2021-06-13 20:06:53 -0500 | |
|---|---|---|
| committer | 2021-06-13 20:06:53 -0500 | |
| commit | 6bade242a5dad723b42cef1d28b06768a518db62 (patch) | |
| tree | ab03f9bf0f5a2dfbba36d5e5a028f8fbdeb3579e | |
| parent | e35c040112a15bf52dc0479c833609dceb71d230 (diff) | |
pcxt: patch program bug
| -rw-r--r-- | src/mame/drivers/pcxt.cpp | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/src/mame/drivers/pcxt.cpp b/src/mame/drivers/pcxt.cpp index 926ebf15cac..1a02af6f5d9 100644 --- a/src/mame/drivers/pcxt.cpp +++ b/src/mame/drivers/pcxt.cpp @@ -16,6 +16,8 @@ Notes: TODO: - 02851: tetriskr: Corrupt game graphics after some time of gameplay, caused by a wrong reading of the i/o $3c8 bit 1. (seems fixed?) +- tetriskr can store inputs read during the timer irq. If ds is 0x40 when the irq is taken + it will corrupt the BIOS data area which can lead to corrupt graphics - Add a proper FDC device. - buzzer sound has issues in both games @@ -576,7 +578,7 @@ void pcxt_state::tetriskr(machine_config &config) ISA8_SLOT(config, "isa1", 0, "mb:isa", filetto_isa8_cards, "tetriskr", true); // FIXME: determine ISA bus clock - RAM(config, RAM_TAG).set_default_size("640K"); + RAM(config, RAM_TAG).set_default_size("64K"); } ROM_START( filetto ) @@ -604,6 +606,11 @@ ROM_END ROM_START( tetriskr ) ROM_REGION( 0x10000, "bios", 0 ) /* code */ ROM_LOAD( "b-10.u10", 0x0000, 0x10000, CRC(efc2a0f6) SHA1(5f0f1e90237bee9b78184035a32055b059a91eb3) ) + ROM_FILL( 0x1bdb, 1, 0xba ) // patch to work around input bug mentioned above + ROM_FILL( 0x1bdc, 1, 0x00 ) + ROM_FILL( 0x1bdd, 1, 0x01 ) + ROM_FILL( 0x1bde, 1, 0x8e ) + ROM_FILL( 0x1bdf, 1, 0xda ) ROM_END GAME( 1990, filetto, 0, filetto, filetto, pcxt_state, empty_init, ROT0, "Novarmatic", "Filetto (v1.05 901009)", MACHINE_IMPERFECT_SOUND ) |
