Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-04-23 17:00:53 +03:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

ti99: Added VRAM size option to Enhanced Video Processor Card.

Browse Source
This commit is contained in:
Michael Zapf 2020-02-04 21:28:39 +01:00
parent f22a130dc0
commit ba45b89bfd
1 changed files with 10 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
src/devices/bus/ti99/peb/evpc.cpp
View File

@ -27,6 +27,9 @@
Thus we assume that in the TI console (option 1) the sound chip has
also been removed.
The EVPC has one configuration option:
VRAM may be set to 128K or 192K.
Important note: The DSR (firmware) of the EVPC expects a memory expansion
to be present; otherwise, the configuration (using CALL EVPC) will crash.
There is no warning if the 32K expansion is not present.
@ -416,6 +419,7 @@ void snug_enhanced_video_device::device_reset()
m_dsr_page = 0;
m_RAMEN = false;
m_selected = false;
m_video->set_vram_size((ioport("EVPC-MEM")->read()==0)? 0x20000 : 0x30000);
}
void snug_enhanced_video_device::device_stop()
@ -469,6 +473,11 @@ INPUT_PORTS_START( ti99_evpc )
PORT_DIPNAME( 0x01, 0x00, "EVPC Configuration" )
PORT_DIPSETTING( 0x00, "DIP" )
PORT_DIPSETTING( 0x01, "NOVRAM" )
PORT_START( "EVPC-MEM" )
PORT_CONFNAME( 0x01, 0x00, "EVPC video memory" )
PORT_DIPSETTING( 0x00, "128K" )
PORT_DIPSETTING( 0x01, "192K" )
INPUT_PORTS_END
const tiny_rom_entry *snug_enhanced_video_device::device_rom_region() const
@ -485,7 +494,7 @@ void snug_enhanced_video_device::device_add_mconfig(machine_config& config)
{
// video hardware
V9938(config, m_video, XTAL(21'477'272)); // typical 9938 clock, not verified
m_video->set_vram_size(0x20000);
m_video->int_cb().set(FUNC(snug_enhanced_video_device::video_interrupt_in));
m_video->set_screen(TI_SCREEN_TAG);
screen_device& screen(SCREEN(config, TI_SCREEN_TAG, SCREEN_TYPE_RASTER));