summaryrefslogtreecommitdiff
path: root/z80_util.c
blob: 39526aae61b73eb02e73745538da8d7ace9dac7a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46

void z80_read_8(z80_context *context)
{
	context->cycles += 3 * context->opts->gen.clock_divider;
	context->scratch1 = read_byte(context->scratch1, NULL, &context->opts->gen, context);
}

void z80_write_8(z80_context *context)
{
	context->cycles += 3 * context->opts->gen.clock_divider;
	write_byte(context->scratch2, context->scratch1, NULL, &context->opts->gen, context);
}

void z80_io_read8(z80_context *context)
{
	uint32_t tmp_mask = context->opts->gen.address_mask;
	memmap_chunk const *tmp_map = context->opts->gen.memmap;
	uint32_t tmp_chunks = context->opts->gen.memmap_chunks;
	
	context->opts->gen.address_mask = context->io_mask;
	context->opts->gen.memmap = context->io_map;
	context->opts->gen.memmap_chunks = context->io_chunks;
	
	context->scratch1 = read_byte(context->scratch1, NULL, &context->opts->gen, context);
	
	context->opts->gen.address_mask = tmp_mask;
	context->opts->gen.memmap = tmp_map;
	context->opts->gen.memmap_chunks = tmp_chunks;
}

void z80_io_write8(z80_context *context)
{
	uint32_t tmp_mask = context->opts->gen.address_mask;
	memmap_chunk const *tmp_map = context->opts->gen.memmap;
	uint32_t tmp_chunks = context->opts->gen.memmap_chunks;
	
	context->opts->gen.address_mask = context->io_mask;
	context->opts->gen.memmap = context->io_map;
	context->opts->gen.memmap_chunks = context->io_chunks;
	
	write_byte(context->scratch2, context->scratch1, NULL, &context->opts->gen, context);
	
	context->opts->gen.address_mask = tmp_mask;
	context->opts->gen.memmap = tmp_map;
	context->opts->gen.memmap_chunks = tmp_chunks;
}