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apple1-videocard-lib
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rename TMS ports

This commit is contained in:
nino-porcino 2021-12-05 16:21:39 +01:00
parent 388ed3c50f
commit 2c50416849
1 changed files with 35 additions and 35 deletions
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70
test.c
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@ -11,8 +11,8 @@
const word TERM_DATA = 0xd012; // write ascii
const word TERM_CTRL = 0xd013; // control port
const byte *VDP_DATA = 0xC000; // TMS9918 data port (VRAM)
const byte *VDP_REG = 0xC001; // TMS9918 register port (write) or status (read)
const byte *VDP_DATA = 0xCC00; // TMS9918 data port (VRAM)
const byte *VDP_REG = 0xCC01; // TMS9918 register port (write) or status (read)
#else
// VIC20
const word ECHO = 0xFFD2; // chrout routine in kernal rom
@ -34,10 +34,10 @@ const byte READ_FROM_VRAM = 0b00000000;
#define NOP asm { nop }
#define TMS_WRITE_REG(a) (*VDP_REG=(byte)(a))
#define TMS_WRITE_DATA(a) (*VDP_DATA=(byte)(a))
#define TMS_READ_REG (*VDP_REG);
#define TMS_READ_DATA (*VDP_DATA);
#define TMS_WRITE_CTRL_PORT(a) (*VDP_REG=(byte)(a))
#define TMS_WRITE_DATA_PORT(a) (*VDP_DATA=(byte)(a))
#define TMS_READ_CTRL_PORT (*VDP_REG);
#define TMS_READ_DATA_PORT (*VDP_DATA);
// status register
#define FRAME_BIT(a) ((a) & 0b10000000)
@ -47,20 +47,20 @@ const byte READ_FROM_VRAM = 0b00000000;
// sets the VRAM write address on the TMS9918
void set_vram_write_addr(word addr) {
TMS_WRITE_REG(<addr);
TMS_WRITE_REG((>addr & 0b00111111)|WRITE_TO_VRAM);
TMS_WRITE_CTRL_PORT(<addr);
TMS_WRITE_CTRL_PORT((>addr & 0b00111111)|WRITE_TO_VRAM);
}
// sets the VRAM read address on the TMS9918
void set_vram_read_addr(word addr) {
TMS_WRITE_REG(<addr);
TMS_WRITE_REG((>addr & 0b00111111)|READ_FROM_VRAM);
TMS_WRITE_CTRL_PORT(<addr);
TMS_WRITE_CTRL_PORT((>addr & 0b00111111)|READ_FROM_VRAM);
}
// writes a value to a TMS9918 register (0-7)
void write_reg(byte regnum, byte val) {
TMS_WRITE_REG(val);
TMS_WRITE_REG((regnum & 0b00001111)|WRITE_TO_REG);
TMS_WRITE_CTRL_PORT(val);
TMS_WRITE_CTRL_PORT((regnum & 0b00001111)|WRITE_TO_REG);
}
inline void set_color(byte col) {
@ -113,21 +113,21 @@ void SCREEN1_LOAD_FONT() {
// start writing into VRAM from space character (32..127)
set_vram_write_addr(SCREEN1_PATTERN_TABLE+(32*8));
for(i=768;i!=0;i--) {
TMS_WRITE_DATA(*source++);
TMS_WRITE_DATA_PORT(*source++);
}
// reverse font (32..127)
source = FONT;
set_vram_write_addr(SCREEN1_PATTERN_TABLE+((128+32)*8));
for(i=768;i!=0;i--) {
TMS_WRITE_DATA(~(*source++));
TMS_WRITE_DATA_PORT(~(*source++));
}
}
// prints character to TMS (SCREEN 1 MODE)
void SCREEN1_PUTCHAR(byte c) {
set_vram_write_addr(screen1_cursor++);
TMS_WRITE_DATA(c);
TMS_WRITE_DATA_PORT(c);
}
// prints 0 terminated string pointed by YA
@ -150,19 +150,19 @@ void SCREEN1_FILL() {
// fills name table with spaces (32)
set_vram_write_addr(SCREEN1_NAME_TABLE);
for(word i=SCREEN1_SIZE;i!=0;i--) {
TMS_WRITE_DATA(32);
TMS_WRITE_DATA_PORT(32);
}
// fill pattern table with 0
set_vram_write_addr(SCREEN1_PATTERN_TABLE);
for(word i=256*8;i!=0;i--) {
TMS_WRITE_DATA(0);
TMS_WRITE_DATA_PORT(0);
}
// fill color table with $1F
set_vram_write_addr(SCREEN1_COLOR_TABLE);
for(byte i=32;i!=0;i--) {
TMS_WRITE_DATA(0x1f);
TMS_WRITE_DATA_PORT(0x1f);
}
}
@ -194,27 +194,27 @@ void SCREEN2_FILL() {
// fills name table x3 with increasing numbers
set_vram_write_addr(SCREEN2_NAME_TABLE);
for(word i=0;i<SCREEN2_SIZE;i++) {
TMS_WRITE_DATA(i & 0xFF);
TMS_WRITE_DATA_PORT(i & 0xFF);
}
// fill pattern table with 0 (clear screen)
set_vram_write_addr(SCREEN2_PATTERN_TABLE);
for(word i=768*8;i!=0;i--) {
TMS_WRITE_DATA(0);
TMS_WRITE_DATA_PORT(0);
}
// fill color table with $1F
set_vram_write_addr(SCREEN2_COLOR_TABLE);
for(word i=768*8;i!=0;i--) {
TMS_WRITE_DATA(0x1f);
TMS_WRITE_DATA_PORT(0x1f);
}
}
void SCREEN2_PUTC(byte ch, byte x, byte y, byte col) {
byte *source = &FONT[(word)(ch-32)*8];
word addr = x*8 + y*256;
set_vram_write_addr(SCREEN2_PATTERN_TABLE + addr); for(byte i=0;i<8;i++) TMS_WRITE_DATA(source[i]);
set_vram_write_addr(SCREEN2_COLOR_TABLE + addr); for(byte i=0;i<8;i++) TMS_WRITE_DATA(col);
set_vram_write_addr(SCREEN2_PATTERN_TABLE + addr); for(byte i=0;i<8;i++) TMS_WRITE_DATA_PORT(source[i]);
set_vram_write_addr(SCREEN2_COLOR_TABLE + addr); for(byte i=0;i<8;i++) TMS_WRITE_DATA_PORT(col);
}
void SCREEN2_PUTS(byte x, byte y, byte col, char *s) {
@ -234,7 +234,7 @@ void SCREEN2_PLOT(byte x, byte y) {
byte pow2_table_reversed[8] = { 128,64,32,16,8,4,2,1 };
word paddr = SCREEN2_PATTERN_TABLE + (word)(x & 0b11111000) + (word)(y & 0b11111000)*32 + y%8;
set_vram_read_addr(paddr);
byte data = TMS_READ_DATA;
byte data = TMS_READ_DATA_PORT;
byte mask = pow2_table_reversed[x%8];
set_vram_write_addr(paddr);
switch(SCREEN2_PLOT_MODE) {
@ -248,23 +248,23 @@ void SCREEN2_PLOT(byte x, byte y) {
data ^= mask;
break;
}
TMS_WRITE_DATA(data);
TMS_WRITE_DATA_PORT(data);
}
void screen1_square_sprites() {
// fills first sprite pattern with 255
set_vram_write_addr(SCREEN1_SPRITE_PATTERNS); // start writing in the sprite patterns
for(byte i=0;i<8;i++) {
TMS_WRITE_DATA(255);
TMS_WRITE_DATA_PORT(255);
}
// set sprite coordinates
set_vram_write_addr(SCREEN1_SPRITE_ATTRS); // start writing in the sprite attribute
for(byte i=0;i<32;i++) {
TMS_WRITE_DATA((6+i)*8); NOP; NOP; NOP; NOP; // y coordinate
TMS_WRITE_DATA((6+i)*8); NOP; NOP; NOP; NOP; // x coordinate
TMS_WRITE_DATA(0); NOP; NOP; NOP; NOP; // name
TMS_WRITE_DATA(i); NOP; NOP; NOP; NOP; // color
TMS_WRITE_DATA_PORT((6+i)*8); NOP; NOP; NOP; NOP; // y coordinate
TMS_WRITE_DATA_PORT((6+i)*8); NOP; NOP; NOP; NOP; // x coordinate
TMS_WRITE_DATA_PORT(0); NOP; NOP; NOP; NOP; // name
TMS_WRITE_DATA_PORT(i); NOP; NOP; NOP; NOP; // color
}
}
@ -272,16 +272,16 @@ void screen2_square_sprites() {
// fills first sprite pattern with 255
set_vram_write_addr(SCREEN2_SPRITE_PATTERNS); // start writing in the sprite patterns
for(byte i=0;i<8;i++) {
TMS_WRITE_DATA(0);
TMS_WRITE_DATA_PORT(0);
}
// set sprite coordinates
set_vram_write_addr(SCREEN2_SPRITE_ATTRS); // start writing in the sprite attribute
for(byte i=0;i<32;i++) {
TMS_WRITE_DATA(0); NOP; NOP; NOP; NOP; // y coordinate
TMS_WRITE_DATA(0); NOP; NOP; NOP; NOP; // x coordinate
TMS_WRITE_DATA(0); NOP; NOP; NOP; NOP; // name
TMS_WRITE_DATA(i); NOP; NOP; NOP; NOP; // color
TMS_WRITE_DATA_PORT(0); NOP; NOP; NOP; NOP; // y coordinate
TMS_WRITE_DATA_PORT(0); NOP; NOP; NOP; NOP; // x coordinate
TMS_WRITE_DATA_PORT(0); NOP; NOP; NOP; NOP; // name
TMS_WRITE_DATA_PORT(i); NOP; NOP; NOP; NOP; // color
}
}