inline static void handle_fetch_matrix(long offset, CLOCK sub,
CLOCK *write_offset)
{
raster_t *raster;
*write_offset = 0;
raster = &ted.raster;
do_matrix_fetch(sub);
if ((ted.ted_raster_counter >= ted.first_dma_line) &&
(ted.ted_raster_counter < ted.last_dma_line)) {
ted.fetch_clk += ted.cycles_per_line;
} else {
ted.fetch_clk += (ted.screen_height - ted.ted_raster_counter) * ted.cycles_per_line;
}
alarm_set(ted.raster_fetch_alarm, ted.fetch_clk);
return;
}
inline static int handle_fetch_matrix(long offset, CLOCK sub,
CLOCK *write_offset)
{
raster_t *raster;
raster_sprite_status_t *sprite_status;
*write_offset = 0;
raster = &vicii.raster;
sprite_status = raster->sprite_status;
if (sprite_status->visible_msk == 0 && sprite_status->dma_msk == 0) {
do_matrix_fetch(sub);
/* As sprites are all turned off, there is no need for a sprite DMA
check; next time we will VICII_FETCH_MATRIX again. This works
because a VICII_CHECK_SPRITE_DMA is forced in `vic_store()'
whenever the mask becomes nonzero. */
/* This makes sure we only create VICII_FETCH_MATRIX events in the bad
line range. These checks are (a little) redundant for safety. */
if (raster->current_line < vicii.first_dma_line) {
vicii.fetch_clk += ((vicii.first_dma_line
- raster->current_line)
* vicii.cycles_per_line);
} else {
if (raster->current_line >= vicii.last_dma_line)
vicii.fetch_clk += ((vicii.screen_height
- raster->current_line
+ vicii.first_dma_line)
* vicii.cycles_per_line);
else
vicii.fetch_clk += vicii.cycles_per_line;
}
alarm_set(vicii.raster_fetch_alarm, vicii.fetch_clk);
return 1;
} else {
int fetch_done;
fetch_done = do_matrix_fetch(sub);
/* Sprites might be turned on, check for sprite DMA next
time. */
vicii.fetch_idx = VICII_CHECK_SPRITE_DMA;
/* Calculate time for next event. */
vicii.fetch_clk = VICII_LINE_START_CLK(maincpu_clk)
+ vicii.sprite_fetch_cycle;
if (vicii.fetch_clk > maincpu_clk || offset == 0) {
/* Prepare the next fetch event. */
alarm_set(vicii.raster_fetch_alarm, vicii.fetch_clk);
return 1;
}
if (fetch_done && sub == 0)
*write_offset = VICII_SCREEN_TEXTCOLS + 3;
}
return 0;
}
