// some text output code (printable characters only)
// with very limited formatting, \r, \n
void putstring(char *s) {
while (*s) {
unsigned char tmp = *s;
switch (tmp) {
case '\r':
nTextPos = nTextRow;
break;
case '\n':
scrn_scroll();
nTextPos = nTextRow;
break;
default:
if ((tmp < 32) || (tmp >= 127)) tmp='.';
vdpchar(nTextPos, tmp);
nTextPos++;
if (nTextPos > nTextEnd) {
scrn_scroll();
nTextPos = nTextRow;
}
break;
}
s++;
}
}
int set_bitmap(int sprite_mode) {
// note: no masking, full size bitmap mode
int unblank = VDP_MODE1_16K | VDP_MODE1_UNBLANK | VDP_MODE1_INT | sprite_mode;
VDP_SET_REGISTER(VDP_REG_MODE0, VDP_MODE0_BITMAP);
VDP_SET_REGISTER(VDP_REG_MODE1, VDP_MODE1_16K); // no need to OR in the sprite mode for now
VDP_SET_REGISTER(VDP_REG_SIT, 0x06); gImage = 0x1800;
VDP_SET_REGISTER(VDP_REG_CT, 0xFF); gColor = 0x2000;
VDP_SET_REGISTER(VDP_REG_PDT, 0x03); gPattern = 0x0000;
VDP_SET_REGISTER(VDP_REG_SAL, 0x36); gSprite = 0x1B00; vdpchar(gSprite, 0xd0);
VDP_SET_REGISTER(VDP_REG_SDT, 0x03); gSpritePat = 0x1800;
nTextRow = 736;
nTextEnd = 767;
nTextPos = nTextRow;
return unblank;
}
unsigned char set_multicolor(unsigned char sprite_mode) {
// this layout is untested
unsigned char unblank = VDP_MODE1_16K | VDP_MODE1_UNBLANK | VDP_MODE1_MULTI | VDP_MODE1_INT | sprite_mode;
VDP_SET_REGISTER(VDP_REG_MODE1, VDP_MODE1_16K | VDP_MODE1_MULTI); // no need to OR in the sprite mode for now
// because we blanked the display, we don't have to worry about VDP timing for the rest of this
VDP_SET_REGISTER(VDP_REG_MODE0, 0);
VDP_SET_REGISTER(VDP_REG_SIT, 0x00); gImage = 0x000;
VDP_SET_REGISTER(VDP_REG_PDT, 0x01); gPattern = 0x800;
VDP_SET_REGISTER(VDP_REG_SAL, 0x36); gSprite = 0x1B00; vdpchar(gSprite, 0xd0);
VDP_SET_REGISTER(VDP_REG_SDT, 0x04); gSpritePat = 0x2000;
// no color table, it's all in the PDT
nTextRow = 736;
nTextEnd = 767;
nTextPos = nTextRow;
return unblank;
}
int set_multicolor_raw(int sprite_mode) {
// this layout is untested
vdpchar = vdpchar_default;
int unblank = VDP_MODE1_16K | VDP_MODE1_UNBLANK | VDP_MODE1_MULTI | VDP_MODE1_INT | sprite_mode;
VDP_SET_REGISTER(VDP_REG_MODE0, 0);
VDP_SET_REGISTER(VDP_REG_MODE1, VDP_MODE1_16K | VDP_MODE1_MULTI); // no need to OR in the sprite mode for now
VDP_SET_REGISTER(VDP_REG_SIT, 0x00); gImage = 0x000;
VDP_SET_REGISTER(VDP_REG_PDT, 0x01); gPattern = 0x800;
VDP_SET_REGISTER(VDP_REG_SAL, 0x36); gSprite = 0x1B00; vdpchar(gSprite, 0xd0);
VDP_SET_REGISTER(VDP_REG_SDT, 0x04); gSpritePat = 0x2000;
// no color table, it's all in the PDT
nTextRow = 736;
nTextEnd = 767;
nTextPos = nTextRow;
return unblank;
}
