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vircon32vircon32
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Add bios without logo
1 parent c64fd76 commit 60c6296

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‎Bios/BiosWithoutLogo/BiosNoLogoTexture.png‎

23.4 KB
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‎Bios/BiosWithoutLogo/BiosWithoutLogo.c‎

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// include Vircon libraries
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#include "audio.h"
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#include "video.h"
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#include "time.h"
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#include "string.h"
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#include "misc.h"
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// include project libraries
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#include "ErrorInfo.h"
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// ---------------------------------------------------------
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// GENERAL DEFINITIONS
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// ---------------------------------------------------------
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// BIOS-required regions; these
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// may safely be used by programs
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#define first_region_font 0
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#define region_white_pixel 256
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// other non-required regions, used
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// to draw the logo and error screens
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#define region_console 300
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#define region_cartridge 301
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#define region_down_arrow 302
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#define region_white_square 303
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// colors for error screens
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#define error_colors_background 0xFF8D4130
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#define error_colors_title color_yellow
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#define error_colors_description color_white
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#define error_colors_values 0xFF8080FF
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// ---------------------------------------------------------
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// SUPPORT FUNCTIONS
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// ---------------------------------------------------------
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void draw_message_screen( error_message* message )
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{
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clear_screen( error_colors_background );
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set_multiply_color( color_white );
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select_texture( -1 );
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// write title
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set_multiply_color( error_colors_title );
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print_at( 49, 37, message->title );
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// draw horizontal line
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select_region( region_white_square );
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set_drawing_scale( 640/2, 1 );
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draw_region_zoomed_at( 0, 60 );
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set_drawing_scale( 1, 1 );
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// write description
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set_multiply_color( error_colors_description );
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print_at( 49, 95, message->description );
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}
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// ---------------------------------------------------------
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void print_hex_value( int x, int y, int* name, int value )
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{
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// convert the number to hex
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int[ 10 ] hex_string;
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itoa( value, hex_string, 16 );
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// join all text parts
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int[ 60 ] text;
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strcpy( text, name );
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strcat( text, " = 0x" );
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strcat( text, hex_string );
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// print the text
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print_at( x, y, text );
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}
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// ---------------------------------------------------------
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bool cartridge_connected()
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{
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asm
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{
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"in R0, CAR_Connected"
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}
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}
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// ---------------------------------------------------------
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void request_cartridge()
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{
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// write a custom message as if it was an error
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error_message no_cartridge_message =
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{
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"NO CARTRIDGE FOUND",
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"To play a game, please power off\n"
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"your console and insert a game\n"
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"cartridge compatible with Vircon32."
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};
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draw_message_screen( &no_cartridge_message );
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// draw console diagram
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set_multiply_color( color_white );
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select_region( region_console );
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draw_region_at( 400, 207 );
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select_region( region_cartridge );
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draw_region_at( 469, 76 );
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select_region( region_down_arrow );
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draw_region_at( 497, 149 );
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// ensure everything gets drawn
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end_frame();
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}
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// ---------------------------------------------------------
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// ERROR HANDLER FUNCTION
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// ---------------------------------------------------------
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void error_handler()
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{
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// do not initialize these!
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// or else R0 will be overwritten
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int error_code;
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int instruction_pointer;
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int instruction;
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int immediate_value;
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// save registers to variables
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asm
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{
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"mov {error_code}, R0"
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"mov {instruction_pointer}, R1"
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"mov {instruction}, R2"
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"mov {immediate_value}, R3"
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}
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// ensure everything gets drawn
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end_frame();
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// write the appropriate message for this error code
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if( error_code >= 0 && error_code < (int)error_unknown )
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draw_message_screen( &error_messages[ error_code ] );
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else
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draw_message_screen( &error_messages[ error_unknown ] );
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// now print the related hex values
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set_multiply_color( error_colors_values );
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print_hex_value( 49, 160, "Instruction Pointer", instruction_pointer );
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print_hex_value( 49, 180, "Instruction", instruction );
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print_hex_value( 49, 200, "Immediate Value", immediate_value );
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// stop any sound
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stop_all_channels();
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}
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// ---------------------------------------------------------
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// MAIN FUNCTION
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// ---------------------------------------------------------
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void main( void )
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{
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// very small wait before starting,
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// to ensure a black screen is seen
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clear_screen( color_black );
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sleep( 15 );
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// ------------------------------------
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// PART 1: DEFINE ALL TEXTURE REGIONS
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// ------------------------------------
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select_texture( -1 );
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// all characters of the text font
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define_region_matrix( first_region_font, 1,1, 10,20, 1,1, 32,8, 0 );
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// white pixel
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select_region( region_white_pixel );
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define_region_topleft( 315,169, 315,169 );
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// console
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select_region( region_console );
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define_region_topleft( 1,164, 199,299 );
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// cartridge
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select_region( region_cartridge );
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define_region_topleft( 203,164, 284,237 );
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// down arrow
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select_region( region_down_arrow );
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define_region_topleft( 288,164, 311,223 );
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// white square
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select_region( region_white_square );
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define_region_topleft( 315,164, 316,165 );
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// ------------------------------------
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// PART 7: JUMP TO CARTRIDGE
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// ------------------------------------
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// if no cartrige is connected, show an alert screen and stop
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if( !cartridge_connected() )
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{
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request_cartridge();
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exit();
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}
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// ensure that any video parameters we might have used
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// are restored to their expected defaults at startup
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set_multiply_color( color_white );
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select_region( 0 );
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// jump to first position in cartridge program rom
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asm{ "jmp 0x20000000" }
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}

‎Bios/BiosWithoutLogo/BiosWithoutLogo.xml‎

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<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
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<rom-definition version="1.0">
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<rom type="bios" title="Vircon32 BIOS without logo" version="1.0" />
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<binary path="obj/BiosWithoutLogo.vbin" />
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<textures>
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<texture path="obj/BiosNoLogoTexture.vtex" />
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</textures>
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<sounds>
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<sound path="obj/DummyBiosSound.vsnd" />
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</sounds>
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</rom-definition>

‎Bios/BiosWithoutLogo/DummyBiosSound.wav‎

60 Bytes
Binary file not shown.

‎Bios/BiosWithoutLogo/ErrorInfo.h‎

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// ---------------------------------------------------------
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// HARDWARE ERROR CODES
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// ---------------------------------------------------------
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enum error_codes
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{
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error_memory_read = 0,
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error_memory_write,
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error_port_read,
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error_port_write,
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error_stack_overflow,
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error_stack_underflow,
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error_division,
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error_arc_cosine,
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error_arc_tangent_2,
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error_logarithm,
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error_power,
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error_unknown
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};
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// ---------------------------------------------------------
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// MESSAGES FOR EACH ERROR
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// ---------------------------------------------------------
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struct error_message
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{
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int[ 50 ] title;
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int[ 150 ] description;
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};
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// ---------------------------------------------------------
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error_message[ 12 ] error_messages =
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{
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{
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"ERROR: INVALID MEMORY READ",
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"Program attempted to read from a memory address\n"
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"that does not exist or is in a write-only device."
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},
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{
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"ERROR: INVALID MEMORY WRITE",
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"Program attempted to write on a memory address\n"
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"that does not exist or is in a read-only device."
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},
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{
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"ERROR: INVALID PORT READ",
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"Program attempted to read from a port number\n"
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"that does not exist or is set as write-only."
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},
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{
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"ERROR: INVALID PORT WRITE",
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"Program attempted to write on a port number\n"
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"that does not exist or is set as read-only."
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},
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{
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"ERROR: STACK OVERFLOW",
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"Program pushed too many values in the stack\n"
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"and available RAM memory was exhausted."
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},
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{
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"ERROR: STACK UNDERFLOW",
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"Program popped too many values from the stack\n"
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"and all data stored in stack was exhausted."
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},
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{
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"ERROR: DIVISION BY ZERO",
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"Program attempted to perform a division or\n"
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"modulus operation where the divisor was zero."
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},
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{
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"ERROR: ARC COSINE OUT OF RANGE",
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"Program attempted to perform an arc cosine\n"
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"operation when the argument was not in [-1,+1]."
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},
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{
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"ERROR: ARC TANGENT NOT DEFINED",
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"Program attempted to perform an arc tangent\n"
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"operation when both of the arguments were 0."
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},
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{
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"ERROR: LOGARITHM OUT OF RANGE",
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"Program attempted to perform a logarithm\n"
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"operation when the argument is not positive."
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},
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{
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"ERROR: POWER HAS NO REAL SOLUTION",
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"Program attempted to perform a power operation\n"
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"when base was negative and exponent non integer."
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},
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{
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"UNKNOWN ERROR",
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"Program caused a hardware error with an error\n"
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"code that was not recognized by the BIOS."
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}
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};

‎Bios/BiosWithoutLogo/Make.bat‎

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@echo off
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REM create obj and bin folders if non exiting, since
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REM the development tools will not create them themselves
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if not exist obj mkdir obj
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if not exist bin mkdir bin
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echo.
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echo Compile the C code
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echo --------------------------
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REM compilation of a BIOS requires argument -b
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compile BiosWithoutLogo.c -o obj\BiosWithoutLogo.asm -b || goto :failed
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echo.
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echo Assemble the ASM code
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echo --------------------------
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REM assembly of a BIOS requires argument -b
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assemble obj\BiosWithoutLogo.asm -o obj\BiosWithoutLogo.vbin -b || goto :failed
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echo.
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echo Convert the PNG texture
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echo --------------------------
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png2vircon BiosNoLogoTexture.png -o obj\BiosNoLogoTexture.vtex || goto :failed
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echo.
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echo Convert the WAV sound
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echo --------------------------
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wav2vircon DummyBiosSound.wav -o obj\DummyBiosSound.vsnd || goto :failed
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echo.
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echo Pack the ROM
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echo --------------------------
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packrom BiosWithoutLogo.xml -o bin\BiosWithoutLogo.v32 || goto :failed
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goto :succeeded
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:failed
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echo.
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echo BUILD FAILED
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exit /b %errorlevel%
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:succeeded
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echo.
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echo BUILD SUCCESSFUL
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exit /b
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@echo on

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