From 3e082840a952683d929f691852b8fb2830ab7ae9 Mon Sep 17 00:00:00 2001 From: Jon Langseth Date: Fri, 20 Jul 2012 22:38:56 +0200 Subject: [PATCH 1/1] Starting with a working frame-buffer, and a hard-coded test-image. Code is heavily inspired by the arduino-tvout library --- Makefile | 314 +++++++++++++++++++++++++++++++++++++++++++++ draw.c | 192 +++++++++++++++++++++++++++ draw.h | 37 ++++++ fbosd.c | 149 +++++++++++++++++++++ render.c | 66 ++++++++++ render.h | 6 + video_properties.h | 12 ++ 7 files changed, 776 insertions(+) create mode 100755 Makefile create mode 100644 draw.c create mode 100644 draw.h create mode 100644 fbosd.c create mode 100644 render.c create mode 100644 render.h create mode 100644 video_properties.h diff --git a/Makefile b/Makefile new file mode 100755 index 0000000..345a872 --- /dev/null +++ b/Makefile @@ -0,0 +1,314 @@ +# Hey Emacs, this is a -*- makefile -*- + +# AVR-GCC Makefile template, derived from the WinAVR template (which +# is public domain), believed to be neutral to any flavor of "make" +# (GNU make, BSD make, SysV make) +# +# Adaptations by Jon Langseth +# This modified template is placed in the public domain like the original. +# + + +# Target name and MCU setup ------------------------------------------------- + +TARGET = fbosd + +MCU = atmega328p + +# Processor frequency. +# This will define a symbol, F_CPU, in all source code files equal to the +# processor frequency. You can then use this symbol in your source code to +# calculate timings. Do NOT tack on a 'UL' at the end, this will be done +# automatically to create a 32-bit value in your source code. +# Typical values are: +# F_CPU = 1000000 +# F_CPU = 1843200 +# F_CPU = 2000000 +# F_CPU = 3686400 +# F_CPU = 4000000 +# F_CPU = 7372800 +# F_CPU = 8000000 +# F_CPU = 11059200 +# F_CPU = 14745600 +# F_CPU = 16000000 +# F_CPU = 18432000 +# F_CPU = 20000000 + +# Default settings: +#F_CPU = 1000000 +# Fuse-bits. Recommended tool: http://www.engbedded.com/fusecalc/ +#FUSE_LOW = 0x62 +#FUSE_HIGH = 0xD9 +#FUSE_EXT = 0x7 + +# Fancy 20MHz settings: +F_CPU = 20000000 +## Fuse-bits. Recommended tool: http://www.engbedded.com/fusecalc/ +FUSE_LOW = 0xEF +FUSE_HIGH = 0xD9 +FUSE_EXT = 0x7 + +# Source files to compile --------------------------------------------------- + +# List C source files here. (C dependencies are automatically generated.) +SRC = $(TARGET).c render.c draw.c + +# List Assembler source files here. +# Make them always end in a capital .S. +ASRC = + +# Optimization level, can be [0, 1, 2, 3, s]. +# 0 = turn off optimization. s = optimize for size. +# (Note: 3 is not always the best optimization level. See avr-libc FAQ.) +OPT = 1 + +# Output formats and debug format ------------------------------------------- + +# Output format. (can be srec, ihex, binary) +FORMAT = ihex + +# Debugging format. +# Native formats for AVR-GCC's -g are stabs [default], or dwarf-2. +# AVR (extended) COFF requires stabs, plus an avr-objcopy run. +DEBUG = dwarf-2 + +# Command names (and paths/parameters to them...) --------------------------- + +CC = avr-gcc +OBJCOPY = avr-objcopy +OBJDUMP = avr-objdump +SIZE = avr-size +NM = avr-nm +AVRDUDE = avrdude +REMOVE = rm -f +MV = mv -f + +# Compiler flag to set the C Standard level. +# c89 - "ANSI" C +# gnu89 - c89 plus GCC extensions +# c99 - ISO C99 standard (not yet fully implemented) +# gnu99 - c99 plus GCC extensions +CSTANDARD = -std=gnu99 + +# Place -D or -U options here +CDEFS = -DF_CPU=$(F_CPU)UL + +# Place -I options here +CINCS = + +CFLAGS = -g$(CDEBUG) $(CDEFS) $(CINCS) -O$(OPT) $(CSTANDARD) +CFLAGS += -funsigned-char +CFLAGS += -funsigned-bitfields +CFLAGS += -fpack-struct +CFLAGS += -fshort-enums +CFLAGS += -Wall +CFLAGS += -Wstrict-prototypes +#CFLAGS += -mshort-calls +#CFLAGS += -fno-unit-at-a-time +#CFLAGS += -Wundef +#CFLAGS += -Wunreachable-code +#CFLAGS += -Wsign-compare + +#ASFLAGS = -Wa,-adhlns=$(<:.S=.lst),-gstabs + + +#Additional libraries. + +MATH_LIB = -lm + +# Minimalistic printf version +PRINTF_LIB_MIN = -Wl,-u,vfprintf -lprintf_min + +# Floating point printf version (requires MATH_LIB = -lm) +PRINTF_LIB_FLOAT = -Wl,-u,vfprintf -lprintf_flt + +# If this is left blank, then it will use the Standard printf version. +PRINTF_LIB = +#PRINTF_LIB = $(PRINTF_LIB_MIN) +#PRINTF_LIB = $(PRINTF_LIB_FLOAT) + + +# Minimalistic scanf version +SCANF_LIB_MIN = -Wl,-u,vfscanf -lscanf_min + +# Floating point + %[ scanf version (requires MATH_LIB = -lm) +SCANF_LIB_FLOAT = -Wl,-u,vfscanf -lscanf_flt + +# If this is left blank, then it will use the Standard scanf version. +SCANF_LIB = +#SCANF_LIB = $(SCANF_LIB_MIN) +#SCANF_LIB = $(SCANF_LIB_FLOAT) + + +# External memory options + +# 64 KB of external RAM, starting after internal RAM (ATmega128!), +# used for variables (.data/.bss) and heap (malloc()). +#EXTMEMOPTS = -Wl,--section-start,.data=0x801100,--defsym=__heap_end=0x80ffff + +# 64 KB of external RAM, starting after internal RAM (ATmega128!), +# only used for heap (malloc()). +#EXTMEMOPTS = -Wl,--defsym=__heap_start=0x801100,--defsym=__heap_end=0x80ffff + +EXTMEMOPTS = + + +#LDMAP = $(LDFLAGS) -Wl,-Map=$(TARGET).map,--cref +LDFLAGS = $(EXTMEMOPTS) $(LDMAP) $(PRINTF_LIB) $(SCANF_LIB) $(MATH_LIB) + + +# Programming support using avrdude. Settings and variables. + +AVRDUDE_PROGRAMMER = usbtiny +AVRDUDE_PORT = usb + +AVRDUDE_WRITE_FLASH = -U flash:w:$(TARGET).hex +#AVRDUDE_WRITE_EEPROM = -U eeprom:w:$(TARGET).eep + + +# Uncomment the following if you want avrdude's erase cycle counter. +# Note that this counter needs to be initialized first using -Yn, +# see avrdude manual. +#AVRDUDE_ERASE_COUNTER = -y + +# Uncomment the following if you do /not/ wish a verification to be +# performed after programming the device. +#AVRDUDE_NO_VERIFY = -V + +# Increase verbosity level. Please use this when submitting bug +# reports about avrdude. See +# to submit bug reports. +#AVRDUDE_VERBOSE = -v -v + +AVRDUDE_BASIC = -p $(MCU) -P $(AVRDUDE_PORT) -c $(AVRDUDE_PROGRAMMER) +AVRDUDE_FLAGS = $(AVRDUDE_BASIC) $(AVRDUDE_NO_VERIFY) $(AVRDUDE_VERBOSE) $(AVRDUDE_ERASE_COUNTER) + + +# Define all object files. +OBJ = $(SRC:.c=.o) $(ASRC:.S=.o) + +# Define all listing files. +LST = $(ASRC:.S=.lst) $(SRC:.c=.lst) + +# Combine all necessary flags and optional flags. +# Add target processor to flags. +ALL_CFLAGS = -mmcu=$(MCU) -I. $(CFLAGS) +ALL_ASFLAGS = -mmcu=$(MCU) -I. -x assembler-with-cpp $(ASFLAGS) + + +# Default target. +all: build + +build: elf hex eep size + +elf: $(TARGET).elf +hex: $(TARGET).hex +eep: $(TARGET).eep +lss: $(TARGET).lss +sym: $(TARGET).sym + +# Display size of file. +HEXSIZE = $(SIZE) --target=$(FORMAT) $(TARGET).hex +ELFSIZE = $(SIZE) --mcu=$(MCU) --format=avr $(TARGET).elf + +size: + @echo + $(SIZE) --mcu=$(MCU) --format=avr $(TARGET).elf + $(SIZE) --target=$(FORMAT) $(TARGET).hex + +# Program the device. +program: $(TARGET).hex $(TARGET).eep + $(AVRDUDE) $(AVRDUDE_FLAGS) $(AVRDUDE_WRITE_FLASH) $(AVRDUDE_WRITE_EEPROM) + + +# make fuseread can be used to test programmer connectivity, and naturally to verify fuses.. +fuseread: + $(AVRDUDE) $(AVRDUDE_BASIC) -q -U lfuse:r:-:h -U hfuse:r:-:h -U efuse:r:-:h + +FUSES = +ifdef FUSE_EXT +FUSES += -U efuse:w:$(FUSE_EXT):m +endif +FUSES += -U hfuse:w:$(FUSE_HIGH):m +FUSES += -U lfuse:w:$(FUSE_LOW):m + +fusebits: $(TARGET).hex + $(AVRDUDE) $(AVRDUDE_BASIC) $(FUSES) +# Convert ELF to COFF for use in debugging / simulating in AVR Studio or VMLAB. +COFFCONVERT=$(OBJCOPY) --debugging \ +--change-section-address .data-0x800000 \ +--change-section-address .bss-0x800000 \ +--change-section-address .noinit-0x800000 \ +--change-section-address .eeprom-0x810000 + + +coff: $(TARGET).elf + $(COFFCONVERT) -O coff-avr $(TARGET).elf $(TARGET).cof + + +extcoff: $(TARGET).elf + $(COFFCONVERT) -O coff-ext-avr $(TARGET).elf $(TARGET).cof + + +.SUFFIXES: .elf .hex .eep .lss .sym + +.elf.hex: + $(OBJCOPY) -O $(FORMAT) -R .eeprom $< $@ + +.elf.eep: + -$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load" \ + --change-section-lma .eeprom=0 -O $(FORMAT) $< $@ + +# Create extended listing file from ELF output file. +.elf.lss: + $(OBJDUMP) -h -S $< > $@ + +# Create a symbol table from ELF output file. +.elf.sym: + $(NM) -n $< > $@ + + + +# Link: create ELF output file from object files. +$(TARGET).elf: $(OBJ) + $(CC) $(ALL_CFLAGS) $(OBJ) --output $@ $(LDFLAGS) + + +# Compile: create object files from C source files. +.c.o: + $(CC) -c $(ALL_CFLAGS) $< -o $@ + + +# Compile: create assembler files from C source files. +.c.s: + $(CC) -S $(ALL_CFLAGS) $< -o $@ + + +# Assemble: create object files from assembler source files. +.S.o: + $(CC) -c $(ALL_ASFLAGS) $< -o $@ + + + +# Target: clean project. +clean: + $(REMOVE) $(TARGET).hex $(TARGET).eep $(TARGET).cof $(TARGET).elf \ + $(TARGET).map $(TARGET).sym $(TARGET).lss \ + $(OBJ) $(LST) $(SRC:.c=.s) $(SRC:.c=.d) + +# Name of this Makefile (used for "make depend"). +MAKEFILE = Makefile + +depend: + if grep '^# DO NOT DELETE' $(MAKEFILE) >/dev/null; \ + then \ + sed -e '/^# DO NOT DELETE/,$$d' $(MAKEFILE) > \ + $(MAKEFILE).$$$$ && \ + $(MV) $(MAKEFILE).$$$$ $(MAKEFILE); \ + fi + echo '# DO NOT DELETE THIS LINE -- make depend depends on it.' \ + >> $(MAKEFILE); \ + $(CC) -M -mmcu=$(MCU) $(CDEFS) $(CINCS) $(SRC) $(ASRC) >> $(MAKEFILE) + +.PHONY: all build elf hex eep lss sym program coff extcoff clean depend + diff --git a/draw.c b/draw.c new file mode 100644 index 0000000..f2355c3 --- /dev/null +++ b/draw.c @@ -0,0 +1,192 @@ +#include "draw.h" +#include + +extern uint8_t* screen_buffer; +extern uint8_t hres_bytes; + +void sp(uint8_t x, uint8_t y, uint8_t color) +{ + if (color==0) screen_buffer[(x/8) + (y*hres_bytes)] &= ~0x80 >> (x&7); + else if (color==1) screen_buffer[(x/8) + (y*hres_bytes)] |= 0x80 >> (x&7); + else screen_buffer[(x/8) + (y*hres_bytes)] ^= 0x80 >> (x&7); +} + +void set_pixel(uint8_t x, uint8_t y, uint8_t color) +{ + if (x >= hres_bytes*8 || y >= VRES) + return; + sp(x,y,color); +} + +void fill(uint8_t color) +{ + switch(color) { + case c_BLACK: + for (int i = 0; i < (hres_bytes*VRES); i++) + screen_buffer[i] = 0; + break; + case c_WHITE: + for (int i = 0; i < (hres_bytes*VRES); i++) + screen_buffer[i] = 0xFF; + break; + case c_INVERT: + for (int i = 0; i < (hres_bytes*VRES); i++) + screen_buffer[i] = ~screen_buffer[i]; + break; + } +} + + +/* +Bresenham's line algorithm, optimized and simplified. + function line(x0, y0, x1, y1) + dx := abs(x1-x0) + dy := abs(y1-y0) + if x0 < x1 then sx := 1 else sx := -1 + if y0 < y1 then sy := 1 else sy := -1 + err := dx-dy + + loop + setPixel(x0,y0) + if x0 = x1 and y0 = y1 exit loop + e2 := 2*err + if e2 > -dy then + err := err - dy + x0 := x0 + sx + end if + if e2 < dx then + err := err + dx + y0 := y0 + sy + end if + end loop +*/ +void draw_line(uint8_t x0, uint8_t y0, uint8_t x1, uint8_t y1, uint8_t c) +{ + + if (x0 > hres_bytes*8 || y0 > VRES || x1 > hres_bytes*8 || y1 > VRES) + return; + + int dx, dy, sx, sy, err, p; + + dx = abs( x1-x0 ); + dy = abs( y1-y0 ); + if ( x0 < x1 ) sx = 1; else sx = -1; + if ( y0 < y1 ) sy = 1; else sy = -1; + err = dx - dy; + + while (1) + { + sp(x0, y0, c); + if ( ( x0 == x1 ) && ( y0 == y1 ) ) return; + p = 2 * err; + if ( p > -dy ) + { + err = err - dy; + x0 = x0 + sx; + } + if ( p < dx ) + { + err = err + dx; + y0 = y0 + sy; + } + } +} +// draw_row and draw_col ... +// These whould really be used for optimization. +// As is, they exist for conveniance, not speed :P +void draw_col(uint8_t x, uint8_t y0, uint8_t y1, uint8_t c) +{ + draw_line( x, y0, x, y1, c ); +} +void draw_row(uint8_t y, uint8_t x0, uint8_t x1, uint8_t c) +{ + draw_line( x0, y, x1, y, c ); +} + + +void _draw_rect(uint8_t x0, uint8_t y0, uint8_t w, uint8_t h, int8_t c, int8_t fc ) +{ + if ( fc != -1 ) + for (unsigned char i = 0; i < h; i++) + draw_line(x0,y0+i,x0+w,y0+i,c); + + draw_line(x0,y0,x0+w,y0,c); + draw_line(x0,y0,x0,y0+h,c); + draw_line(x0+w,y0,x0+w,y0+h,c); + draw_line(x0,y0+h,x0+w,y0+h,c); +} + +void _draw_circle(uint8_t x0, uint8_t y0, uint8_t radius, int8_t c, int8_t fc) { + + int f = 1 - radius; + int ddF_x = 1; + int ddF_y = -2 * radius; + int x = 0; + int y = radius; + uint8_t pyy = y,pyx = x; + + //there is a fill color + if (fc != -1) + draw_row(y0,x0-radius,x0+radius,fc); + + sp(x0, y0 + radius,c); + sp(x0, y0 - radius,c); + sp(x0 + radius, y0,c); + sp(x0 - radius, y0,c); + + while(x < y) { + if(f >= 0) { + y--; + ddF_y += 2; + f += ddF_y; + } + x++; + ddF_x += 2; + f += ddF_x; + //there is a fill color + if (fc > -1) { + //prevent double draws on the same rows + if (pyy != y) { + draw_row(y0+y,x0-x,x0+x,fc); + draw_row(y0-y,x0-x,x0+x,fc); + } + if (pyx != x && x != y) { + draw_row(y0+x,x0-y,x0+y,fc); + draw_row(y0-x,x0-y,x0+y,fc); + } + pyy = y; + pyx = x; + } + + sp(x0 + x, y0 + y,c); + sp(x0 - x, y0 + y,c); + sp(x0 + x, y0 - y,c); + sp(x0 - x, y0 - y,c); + sp(x0 + y, y0 + x,c); + sp(x0 - y, y0 + x,c); + sp(x0 + y, y0 - x,c); + sp(x0 - y, y0 - x,c); + } +} + +void draw_rect(uint8_t x0, uint8_t y0, uint8_t w, uint8_t h, uint8_t c) +{ + _draw_rect(x0, y0, w, h, c, -1); +} + +void fill_rect(uint8_t x0, uint8_t y0, uint8_t w, uint8_t h, uint8_t c) +{ + _draw_rect(x0, y0, w, h, c, c); +} + +void draw_circle(uint8_t x0, uint8_t y0, uint8_t radius, char c) +{ + _draw_circle(x0, y0, radius, c, -1); +} + +void fill_circle(uint8_t x0, uint8_t y0, uint8_t radius, char c) +{ + _draw_circle(x0, y0, radius, c, c); +} + + diff --git a/draw.h b/draw.h new file mode 100644 index 0000000..e7690a4 --- /dev/null +++ b/draw.h @@ -0,0 +1,37 @@ +#ifndef DRAW_H +#define DRAW_H + +#include +#include "video_properties.h" + +#define c_BLACK 0 +#define c_WHITE 1 +#define c_INVERT 2 +#define c_NONE -1 + + +void sp(uint8_t x, uint8_t y, uint8_t color); + +void set_pixel(uint8_t x, uint8_t y, uint8_t color); +// TODO: may need unsigned char get_pixel(uint8_t x, uint8_t y); + +void fill(uint8_t color); +// TODO: may need void shift(uint8_t distance, uint8_t direction); + +void draw_line(uint8_t x0, uint8_t y0, uint8_t x1, uint8_t y1, uint8_t c); +void draw_row(uint8_t x, uint8_t y0, uint8_t y1, uint8_t c); +void draw_col(uint8_t y, uint8_t x0, uint8_t x1, uint8_t c); + +void _draw_rect(uint8_t x0, uint8_t y0, uint8_t w, uint8_t h, int8_t c, int8_t fc); +void _draw_circle(uint8_t x0, uint8_t y0, uint8_t radius, int8_t c, int8_t fc); + +void draw_rect(uint8_t x0, uint8_t y0, uint8_t w, uint8_t h, uint8_t c); +void fill_rect(uint8_t x0, uint8_t y0, uint8_t w, uint8_t h, uint8_t c); +void draw_circle(uint8_t x0, uint8_t y0, uint8_t radius, char c); +void fill_circle(uint8_t x0, uint8_t y0, uint8_t radius, char c); + +// TODO: WILL need void draw_bitmap(uint8_t x, uint8_t y, const unsigned char * bmp, uint16_t i = 0, uint8_t width = 0, uint8_t lines = 0); +// TODO draw_bitmap() will be useful for printing text, as printing text +// TODO is drawing font elements, and font elements are ... bitmaps. + +#endif diff --git a/fbosd.c b/fbosd.c new file mode 100644 index 0000000..1c9242a --- /dev/null +++ b/fbosd.c @@ -0,0 +1,149 @@ +#include +#include +#include +#include + +#include "video_properties.h" +#include "render.h" +#include "draw.h" + +void (*line_handler)( void ); + +const int vres_scale = ( SCREEN_LINES / VRES -1 ); +const int hres_bytes = HRES / 8; + +volatile uint8_t* screen_buffer; + +volatile int line; +volatile int buffer_position; + +void Delay_ms(int cnt) +{ + while(cnt-->0) _delay_ms(1); +} + +void active_lines ( void ) +{ + static uint8_t rept; + + _delay_us(4); + + asm_render_line(); + + if( !rept ) + { + if ( buffer_position < ((VRES*hres_bytes)) ) + buffer_position += hres_bytes; + rept = vres_scale; + } + else + rept--; + +} + +void blank_lines ( void ) +{ + if ( line < FIRST_LINE ) + { + PORTB ^= 0x001; + return; + } + line_handler = active_lines; +} + +ISR (INT1_vect) +{ + line_handler(); + line++; + if( line > LAST_LINE) + { + line = 0; + buffer_position = 0; + line_handler = &blank_lines; + EIMSK &= ~(uint8_t)(1< + + +extern volatile int buffer_position; +extern volatile uint8_t hres_bytes; +extern volatile char* screen_buffer; + + +void asm_render_line( void ) { + __asm__ __volatile__ ( + ".macro outbit p" "\n\t" + "BST __tmp_reg__,7" "\n\t" // Store bit 7 to T + "BLD r16,7" "\n\t" // Load bit T into r16 bit number 7 + "OUT \\p,r16" "\n\t" // Send contents of r16 to %[port] + "NOP" "\n\t" // Delay ... + "NOP" "\n\t" // Delay ... + "NOP" "\n\t" // Delay ... + ".endm" "\n\t" + + "ADD r26,r28" "\n\t" // Add register Y to register X, low part + "ADC r27,r29" "\n\t" // Add high Y to X with carry from low part + + "IN r16,%[port]" "\n\t" // Save port content to register 16 + "RJMP start_line" "\n\t" + + "loop_byte:" "\n\t" // Notice that in the macro we always use bit 7 and left-shift + "BST __tmp_reg__,6" "\n\t" // Here we use bit 6 without left-shift to output bit 0 + "BLD r16,7" "\n\t" // of each byte (except the last bit on the line) + "OUT %[port],r16" "\n\t" // We do not have time for a left-shift, teh "extra cycle" was used for "dec-branch" + "NOP" "\n\t" // Delay ... + "NOP" "\n\t" // Delay ... + + "start_line:" "\n\t" + "LD __tmp_reg__,X+" "\n\t" // Load from address pointed to by X into temporary register, then increment X-pointer + + "outbit %[port]" "\n\t" // Output bit 7 using Macro + "LSL __tmp_reg__" "\n\t" // Left-shift for next bit + "outbit %[port]" "\n\t" // Output bit 6 using Macro + "LSL __tmp_reg__" "\n\t" // Left-shift for next bit + "outbit %[port]" "\n\t" // Output bit 5 using Macro + "LSL __tmp_reg__" "\n\t" // Left-shift for next bit + "outbit %[port]" "\n\t" // Output bit 4 using Macro + "LSL __tmp_reg__" "\n\t" // Left-shift for next bit + "outbit %[port]" "\n\t" // Output bit 3 using Macro + "LSL __tmp_reg__" "\n\t" // Left-shift for next bit + "outbit %[port]" "\n\t" // Output bit 2 using Macro + "LSL __tmp_reg__" "\n\t" // Left-shift for next bit + "outbit %[port]" "\n\t" // Output bit 1 using Macro + + "DEC %[hr]" "\n\t" // Decrement num-bytes-remaining-in-resolution + "BRNE loop_byte" "\n\t" // Branch to loop6 if %[hres] != zero + + "LSL __tmp_reg__" "\n\t" // Left-shift for last bit on the line + "outbit %[port]" "\n\t" // Output bit 0 using Macro. + + "CBI %[port],7" "\n\t" // Clear our "display bit" to ensure we end on black + + : + : [port] "i" (_SFR_IO_ADDR(PORTD)), + "x" (screen_buffer), + "y" (buffer_position), + [hr] "d" (hres_bytes) + : "r16" + ); +} diff --git a/render.h b/render.h new file mode 100644 index 0000000..4bf8850 --- /dev/null +++ b/render.h @@ -0,0 +1,6 @@ +#ifndef RENDER_H +#define RENDER_H + +void asm_render_line( void ); + +#endif diff --git a/video_properties.h b/video_properties.h new file mode 100644 index 0000000..6f1b28e --- /dev/null +++ b/video_properties.h @@ -0,0 +1,12 @@ +#ifndef V_PROPS_H +#define V_PROPS_H + +#define HRES 128 +#define VRES 92 + +#define FIRST_LINE 25 +#define LAST_LINE 301 + +#define SCREEN_LINES ( LAST_LINE - FIRST_LINE ) + +#endif -- 2.39.2