87 lines
2.2 KiB
C++
87 lines
2.2 KiB
C++
#include <stdint.h>
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#include "vdp2.h"
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#include "../common/vdp2_func.hpp"
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#include "font/hp_100lx_4bit.data.h"
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void cell_data()
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{
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const uint32_t * start = reinterpret_cast<uint32_t *>(&_binary_font_hp_100lx_4bit_data_start);
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const int size = reinterpret_cast<uint32_t>(&_binary_font_hp_100lx_4bit_data_size);
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for (int i = 0; i < (size / 4); i++) {
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vdp2.vram.u32[i] = start[i];
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}
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}
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void palette_data()
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{
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vdp2.cram.u16[0] = 0x0000;
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vdp2.cram.u16[1] = 0xffff;
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}
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void main()
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{
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v_blank_in();
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// DISP: Please make sure to change this bit from 0 to 1 during V blank.
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vdp2.reg.TVMD = ( TVMD__DISP | TVMD__LSMD__NON_INTERLACE
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| TVMD__VRESO__240 | TVMD__HRESO__NORMAL_320);
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/* set the color mode to 5bits per channel, 1024 colors */
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vdp2.reg.RAMCTL = RAMCTL__CRMD__RGB_5BIT_1024
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| RAMCTL__VRAMD | RAMCTL__VRBMD;
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vdp2.reg.VRSIZE = 0;
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/* enable display of NBG0 */
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vdp2.reg.BGON = BGON__N0ON | BGON__N0TPON;
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/* set character format for NBG0 to palettized 16 color
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set enable "cell format" for NBG0
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set character size for NBG0 to 1x1 cell */
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vdp2.reg.CHCTLA = CHCTLA__N0CHCN__16_COLOR
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| CHCTLA__N0BMEN__CELL_FORMAT
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| CHCTLA__N0CHSZ__1x1_CELL;
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/* plane size */
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vdp2.reg.PLSZ = PLSZ__N0PLSZ__1x1;
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/* map plane offset
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1-word: value of bit 6-0 * 0x2000
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2-word: value of bit 5-0 * 0x4000
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*/
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constexpr int plane_a = 1;
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constexpr int plane_a_offset = plane_a * 0x4000;
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constexpr int page_size = 64 * 64 * 2; // N0PNB__1WORD (16-bit)
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constexpr int plane_size = page_size * 1;
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vdp2.reg.CYCA0 = 0x0F44F99F;
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vdp2.reg.CYCA1 = 0x0F44F99F;
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vdp2.reg.CYCB0 = 0x0F44F99F;
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vdp2.reg.CYCB1 = 0x0F44F99F;
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vdp2.reg.MPOFN = MPOFN__N0MP(0); // bits 8~6
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vdp2.reg.MPABN0 = MPABN0__N0MPB(plane_a) | MPABN0__N0MPA(plane_a); // bits 5~0
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vdp2.reg.MPCDN0 = MPCDN0__N0MPD(plane_a) | MPCDN0__N0MPC(plane_a); // bits 5~0
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palette_data();
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cell_data();
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vdp2.reg.PNCN0 = PNCN0__N0PNB__2WORD;
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for (int i = 0; i < 64 * 64; i++) {
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vdp2.vram.u32[(plane_a_offset / 4) + i] = ' ' - 0x20;
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}
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const char * test = "conversion from 8";
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int ix = 0;
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while (*test) {
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uint8_t c = *test++;
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vdp2.vram.u32[(plane_a_offset / 4) + ix++] = c - 0x20;
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}
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while (1);
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}
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