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
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
// license:BSD-3-Clause
// copyright-holders:Vas Crabb
#include "emu.h"
#include "prommemory.h"
DEFINE_DEVICE_TYPE_NS(INTELLEC4_PROM_MEMORY, bus::intellec4, imm6_26_device, "intlc4_imm6_26", "Intel imm6-26 PROM Memory Module")
namespace bus { namespace intellec4 {
imm6_26_device::imm6_26_device(machine_config const &mconfig, char const *tag, device_t *owner, u32 clock)
: device_t(mconfig, INTELLEC4_PROM_MEMORY, tag, owner, clock)
, device_univ_card_interface(mconfig, *this)
, device_image_interface(mconfig, *this)
, m_data()
{
}
image_init_result imm6_26_device::call_load()
{
if ((length() > 4096U) || (length() % 256U))
return image_init_result::FAIL;
unmap();
allocate();
if (fread(m_data.get(), length()) != length())
return image_init_result::FAIL;
// FIXME: gimme a cookie!
rom_space().install_rom(0x1000U, offs_t(0x1000U + length()), m_data.get());
return image_init_result::PASS;
}
void imm6_26_device::call_unload()
{
unmap();
}
void imm6_26_device::device_start()
{
allocate();
save_pointer(NAME(m_data), 4096U);
}
void imm6_26_device::allocate()
{
if (!m_data)
{
m_data = std::make_unique<u8 []>(4096U);
std::fill(m_data.get(), m_data.get() + 4096U, 0U);
}
}
void imm6_26_device::unmap()
{
// FIXME: where's my magic cookie?
rom_space().unmap_read(0x1000U, 0x1fffU);
}
} } // namespace bus::intellec4
|