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1 | 1 | #include <c128.h> |
2 | 2 | #include "display_macros.h" |
| 3 | +#include <peekpoke.h> |
3 | 4 |
|
| 5 | +#include "8x8_chars.h" |
| 6 | + |
| 7 | +#include "udg_map.h" |
| 8 | + |
| 9 | +#define ADDRESS_PORT 0xD600 |
| 10 | +#define DATA_PORT 0xD601 |
| 11 | + |
| 12 | +#define HIGH_ADDRESS_REGISTER 0x12 |
| 13 | +#define LOW_ADDRESS_REGISTER 0x13 |
| 14 | +#define VDC_DATA_REGISTER 0x1F |
| 15 | + |
| 16 | +#define CHAR_BASE 0x3000 |
| 17 | + |
| 18 | +void vdc_write(uint8_t vdc_register, uint8_t value) |
| 19 | +{ |
| 20 | + POKE(ADDRESS_PORT,vdc_register); |
| 21 | + while(!(PEEK(ADDRESS_PORT)&(0x80))){}; |
| 22 | + POKE(DATA_PORT,value); |
| 23 | +} |
| 24 | + |
| 25 | +void redefine(uint8_t tile, const uint8_t definition[]) |
| 26 | +{ |
| 27 | + uint8_t i; |
| 28 | + uint16_t address = CHAR_BASE + (((uint16_t)tile)<<4U); |
| 29 | + vdc_write(HIGH_ADDRESS_REGISTER,(uint8_t)(address>>8)); |
| 30 | + vdc_write(LOW_ADDRESS_REGISTER,(uint8_t)(address&0x00FF)); |
| 31 | + for(i=0;i<8;++i) |
| 32 | + { |
| 33 | + vdc_write(VDC_DATA_REGISTER,definition[i]); |
| 34 | + } |
| 35 | +} |
| 36 | + |
| 37 | +void set_udg(void) |
| 38 | +{ |
| 39 | + uint8_t i; |
| 40 | + |
| 41 | + for (i = 0; i < (sizeof(redefine_map)/sizeof(*redefine_map)); ++i) |
| 42 | + { |
| 43 | + redefine(redefine_map[i].ascii,redefine_map[i].bitmap); |
| 44 | + } |
| 45 | +} |
| 46 | + |
| 47 | + |
| 48 | +// #define DEBUG |
4 | 49 |
|
5 | 50 | void _XL_INIT_GRAPHICS(void) |
6 | 51 | { |
7 | 52 | fast(); |
8 | 53 | videomode(80); |
| 54 | + |
| 55 | + #if !defined(DEBUG) |
| 56 | + |
| 57 | + set_udg(); |
| 58 | + |
| 59 | + _setScreenColors(); |
| 60 | + |
| 61 | + #else |
| 62 | + |
| 63 | + vdc_write(HIGH_ADDRESS_REGISTER,0x00); |
| 64 | + vdc_write(LOW_ADDRESS_REGISTER,0x00); |
| 65 | + { |
| 66 | + uint8_t i; |
| 67 | + |
| 68 | + for(i=0;i<255;++i) |
| 69 | + { |
| 70 | + vdc_write(VDC_DATA_REGISTER,i); |
| 71 | + }; |
| 72 | + } |
| 73 | + // sleep(2); |
| 74 | + set_udg(); |
| 75 | + // sleep(2); |
| 76 | + while(1){}; |
| 77 | + |
9 | 78 | _setScreenColors(); |
| 79 | + #endif |
10 | 80 | } |
11 | 81 |
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