[f40a309] | 1 | /*
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| 2 | =============================================================================
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| 3 | ttcpos.c -- virtual typewriter cursor positioning
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| 4 | Version 9 -- 1988-03-08 -- D.N. Lynx Crowe
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| 5 | =============================================================================
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| 6 | */
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| 7 |
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| 8 | #include "stddefs.h"
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| 9 | #include "graphdef.h"
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| 10 | #include "vsdd.h"
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| 11 | #include "vsddsw.h"
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| 12 | #include "vsddvars.h"
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| 13 | #include "hwdefs.h"
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| 14 | #include "memory.h"
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| 15 | #include "fields.h"
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| 16 |
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| 17 | #include "midas.h"
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| 18 | #include "libdsp.h"
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| 19 |
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| 20 | #define CW_0 0x0000
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| 21 | #define CW_F 0xFFFF
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| 22 |
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[7258c6a] | 23 | extern uint16_t exp_c(uint16_t c);
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[f40a309] | 24 |
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[e225e77] | 25 | extern void andcopy(uint16_t *to, uint16_t *from, uint16_t with, int16_t len);
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| 26 |
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[7258c6a] | 27 | extern int16_t vtcrow; /* virtual typewriter cursor row */
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| 28 | extern int16_t vtccol; /* virtual typewriter cursor column */
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[f40a309] | 29 |
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| 30 | /* |
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| 31 |
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| 32 | */
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[7258c6a] | 33 |
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[f40a309] | 34 | static int16_t ttcur[] = {
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| 35 |
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| 36 | CW_0, CW_0, CW_0, CW_0, /* 0 */
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| 37 | CW_0, CW_0, CW_0, CW_0, /* 1 */
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| 38 | CW_0, CW_0, CW_0, CW_0, /* 2 */
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| 39 | CW_0, CW_0, CW_0, CW_0, /* 3 */
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| 40 | CW_0, CW_0, CW_0, CW_0, /* 4 */
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| 41 | CW_0, CW_0, CW_0, CW_0, /* 5 */
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| 42 | CW_0, CW_0, CW_0, CW_0, /* 6 */
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| 43 | CW_0, CW_0, CW_0, CW_0, /* 7 */
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| 44 | CW_0, CW_0, CW_0, CW_0, /* 8 */
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| 45 | CW_0, CW_0, CW_0, CW_0, /* 9 */
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| 46 | CW_0, CW_0, CW_0, CW_0, /* 10 */
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| 47 | CW_0, CW_0, CW_0, CW_0, /* 11 */
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| 48 | CW_F, CW_F, CW_0, CW_0, /* 12 */
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| 49 | CW_0, CW_0, CW_0, CW_0, /* 13 */
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| 50 | CW_0, CW_0, CW_0, CW_0, /* 14 */
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| 51 | CW_0, CW_0, CW_0, CW_0 /* 15 */
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| 52 | };
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| 53 |
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| 54 | /* |
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| 55 |
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| 56 | */
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| 57 |
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| 58 | /*
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| 59 | =============================================================================
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| 60 | ttcini() -- initialize typewriter cursor
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| 61 | =============================================================================
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[7258c6a] | 62 | */
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[f40a309] | 63 |
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| 64 | void ttcini(uint16_t color)
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| 65 | {
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| 66 | if ((v_regs[5] & 0x0180) NE 0x0100)
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| 67 | vbank(1);
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| 68 |
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| 69 | andcopy(v_tcur, ttcur, exp_c(color), 64);
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| 70 | }
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| 71 |
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| 72 | /*
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| 73 | =============================================================================
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| 74 | ttcpos() -- position the typewriter cursor at ('row', 'col')
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| 75 | =============================================================================
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[7258c6a] | 76 | */
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[f40a309] | 77 |
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[7258c6a] | 78 | void ttcpos(int16_t row, int16_t col)
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[f40a309] | 79 | {
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| 80 | register int16_t yrow, xcol;
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| 81 | register struct octent *op;
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| 82 |
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| 83 | if (v_regs[5] & 0x0180) /* point at the control bank */
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| 84 | vbank(0);
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| 85 |
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| 86 | yrow = row * 14; /* get cursor display position */
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| 87 | xcol = col << 3;
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| 88 |
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| 89 | op = &v_obtab[TTCURS]; /* point at v_obtab entry */
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| 90 |
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| 91 | v_odtab[TTCPRI][0] |= V_BLA; /* blank the object */
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| 92 | objclr(TTCPRI); /* turn off the old location */
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| 93 |
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| 94 | op->objx = xcol; /* update v_obtab entry */
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| 95 | op->objy = yrow;
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| 96 | op->odtw1 = 0x0400 | (0x03FF & (xcol >> 1));
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| 97 |
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| 98 | SetPri(TTCURS, TTCPRI); /* turn on the new location */
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| 99 |
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| 100 | vtcrow = row; /* update cursor position variables */
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| 101 | vtccol = col;
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| 102 | }
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