98 lines
1.8 KiB
C
98 lines
1.8 KiB
C
#include "vic.h"
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#include "cia.h"
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void vic_setbank(char bank)
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{
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cia2.pra = (cia2.pra & 0xfc) | (bank ^ 0x03);
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}
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void vic_sprxy(byte s, int x, int y)
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{
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vic.spr_pos[s].y = y;
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vic.spr_pos[s].x = x & 0xff;
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if (x & 0x100)
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vic.spr_msbx |= 1 << s;
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else
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vic.spr_msbx &= ~(1 << s);
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}
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int vic_sprgetx(byte s)
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{
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return vic.spr_pos[s].x | ((vic.spr_msbx & (1 << s)) ? 256 : 0);
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}
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void vic_setmode(VicMode mode, const char * text, const char * font)
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{
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switch (mode)
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{
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case VICM_TEXT:
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vic.ctrl1 = VIC_CTRL1_DEN | VIC_CTRL1_RSEL | 3;
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vic.ctrl2 = VIC_CTRL2_CSEL;
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break;
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case VICM_TEXT_MC:
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vic.ctrl1 = VIC_CTRL1_DEN | VIC_CTRL1_RSEL | 3;
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vic.ctrl2 = VIC_CTRL2_CSEL | VIC_CTRL2_MCM;
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break;
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case VICM_TEXT_ECM:
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vic.ctrl1 = VIC_CTRL1_DEN | VIC_CTRL1_ECM | VIC_CTRL1_RSEL | 3;
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vic.ctrl2 = VIC_CTRL2_CSEL;
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break;
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case VICM_HIRES:
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vic.ctrl1 = VIC_CTRL1_BMM | VIC_CTRL1_DEN | VIC_CTRL1_RSEL | 3;
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vic.ctrl2 = VIC_CTRL2_CSEL;
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break;
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case VICM_HIRES_MC:
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vic.ctrl1 = VIC_CTRL1_BMM | VIC_CTRL1_DEN | VIC_CTRL1_RSEL | 3;
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vic.ctrl2 = VIC_CTRL2_CSEL | VIC_CTRL2_MCM;
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break;
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default:
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__assume(false);
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}
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cia2.pra = (cia2.pra & 0xfc) | (((unsigned)text >> 14) ^ 0x03);
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vic.memptr = (((unsigned)text >> 6) & 0xf0) | (((unsigned)font >> 10) & 0x0e);
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}
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void vic_waitBottom(void)
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{
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while (!(vic.ctrl1 & VIC_CTRL1_RST8))
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;
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}
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void vic_waitTop(void)
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{
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while ((vic.ctrl1 & VIC_CTRL1_RST8))
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;
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}
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void vic_waitFrame(void)
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{
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while ((vic.ctrl1 & VIC_CTRL1_RST8))
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;
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while (!(vic.ctrl1 & VIC_CTRL1_RST8))
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;
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}
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void vic_waitFrames(char n)
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{
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while (n > 0)
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{
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vic_waitFrame();
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n--;
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}
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}
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void vic_waitLine(int line)
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{
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char upper = (char)(line >> 1) & VIC_CTRL1_RST8;
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char lower = (char)line;
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do
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{
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while (vic.raster != lower)
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;
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} while ((vic.ctrl1 & VIC_CTRL1_RST8) != upper);
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}
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#pragma native(vic_waitLine)
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