source: buchla-68k/vlib/vtext.c@ 7258c6a

Last change on this file since 7258c6a was 7258c6a, checked in by Thomas Lopatic <thomas@…>, 7 years ago

Use standard integer types.
  • Property mode set to 100644
File size: 642 bytes
RevLine 
[f40a309]1/*
2 =============================================================================
3 vtext.c -- output a text string to the VSDD in 1 byte / character mode
4 Version 3 -- 1987-06-02 -- D.N. Lynx Crowe
5
6 Assumes VSDD is pointing at bank 0.
7 =============================================================================
8*/
9
[7258c6a]10static int16_t msk[] = { 0xFF00, 0x00FF };
[f40a309]11
[7258c6a]12void vtext(uint16_t *obj, uint16_t nc, uint16_t row, uint16_t col, int8_t *ip)
[f40a309]13{
[7258c6a]14 register uint16_t *op;
[f40a309]15
16 while (*ip) {
17
18 op = obj + ((nc >> 1) * row) + (col >> 1);
19
[7258c6a]20 *op = (*op & (uint16_t)msk[col & 1]) |
[f40a309]21 ((*ip++ & 0x00FF) << ((col & 1) ? 8 : 0));
22
23 col++;
24 }
25}
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