From ba45b89bfd77a30a0f7c1c43ac58445ff52dd8e6 Mon Sep 17 00:00:00 2001 From: Michael Zapf Date: Tue, 4 Feb 2020 21:28:39 +0100 Subject: ti99: Added VRAM size option to Enhanced Video Processor Card. --- src/devices/bus/ti99/peb/evpc.cpp | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/src/devices/bus/ti99/peb/evpc.cpp b/src/devices/bus/ti99/peb/evpc.cpp index 3c97a282fd5..298b1c6432c 100644 --- a/src/devices/bus/ti99/peb/evpc.cpp +++ b/src/devices/bus/ti99/peb/evpc.cpp @@ -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)); -- cgit v1.2.3