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(MESS) elektor : allow quickload into pvi space (nw)

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This commit is contained in:
Robbbert 2013-10-28 11:37:48 +00:00
parent 6aceeec86c
commit c1ab18c168
1 changed files with 44 additions and 20 deletions
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64
src/mess/drivers/vc4000.c
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@ -15,7 +15,7 @@ The PVI has 12 address line (A0-A11) which give him control over 4K. A11 of the
connected to A11 of the CPU, but connected to the cartridge slot. On the cartridge it is
connected to A12 of the CPU which extends the addressable Range to 8K. This is also the
maximum usable space, because A13 and A14 of the CPU are not used.
With the above in mind address range will lock like this:
With the above in mind address range will look like this:
$0000 - $15FF ROM, RAM
$1600 - $167F unused
$1680 - $16FF used for I/O Control on main PCB
@ -171,8 +171,7 @@ static ADDRESS_MAP_START(elektor_mem, AS_PROGRAM, 8, vc4000_state)
ADDRESS_MAP_UNMAP_HIGH
ADDRESS_MAP_GLOBAL_MASK(0x1fff)
AM_RANGE(0x0000, 0x07ff) AM_ROM
AM_RANGE(0x0800, 0x0fff) AM_RAM
//AM_RANGE(0x1000, 0x15ff) AM_RAM ram extension area
AM_RANGE(0x0800, 0x15ff) AM_RAM
AM_RANGE(0x1d80, 0x1dff) AM_MIRROR(0x400) AM_READWRITE(elektor_cass_r,elektor_cass_w)
AM_RANGE(0x1e80, 0x1e8f) AM_MIRROR(0x800) AM_READWRITE(vc4000_key_r,vc4000_sound_ctl)
AM_RANGE(0x1f00, 0x1fff) AM_MIRROR(0x800) AM_READWRITE(vc4000_video_r, vc4000_video_w)
@ -530,7 +529,6 @@ QUICKLOAD_LOAD_MEMBER( vc4000_state,vc4000)
{
address_space &space = m_maincpu->space(AS_PROGRAM);
int i;
int quick_addr = 0x08c0;
int exec_addr;
int quick_length;
UINT8 *quick_data;
@ -563,22 +561,35 @@ QUICKLOAD_LOAD_MEMBER( vc4000_state,vc4000)
}
else
{
quick_addr = quick_data[1] * 256 + quick_data[2];
int quick_addr = quick_data[1] * 256 + quick_data[2];
exec_addr = quick_data[3] * 256 + quick_data[4];
space.write_byte(0x08be, quick_data[3]);
space.write_byte(0x08bf, quick_data[4]);
if (quick_length < 0x5)
{
image.seterror(IMAGE_ERROR_INVALIDIMAGE, "File too short");
image.message(" File too short");
}
else
if ((quick_length + quick_addr - 5) > 0x1600)
{
image.seterror(IMAGE_ERROR_INVALIDIMAGE, "File too long");
image.message(" File too long");
}
else
{
space.write_byte(0x08be, quick_data[3]);
space.write_byte(0x08bf, quick_data[4]);
for (i = 0; i < quick_length - 5; i++)
if ((quick_addr + i) < 0x1600)
space.write_byte(i + quick_addr, quick_data[i+5]);
for (i = 5; i < quick_length; i++)
space.write_byte(i - 5 + quick_addr, quick_data[i]);
/* display a message about the loaded quickload */
image.message(" Quickload: size=%04X : start=%04X : end=%04X : exec=%04X",quick_length-5,quick_addr,quick_addr+quick_length-5,exec_addr);
/* display a message about the loaded quickload */
image.message(" Quickload: size=%04X : start=%04X : end=%04X : exec=%04X",quick_length-5,quick_addr,quick_addr+quick_length-5,exec_addr);
// Start the quickload
m_maincpu->set_state_int(S2650_PC, exec_addr);
result = IMAGE_INIT_PASS;
// Start the quickload
m_maincpu->set_state_int(S2650_PC, exec_addr);
result = IMAGE_INIT_PASS;
}
}
}
else
@ -605,17 +616,30 @@ QUICKLOAD_LOAD_MEMBER( vc4000_state,vc4000)
image.message(" File too short");
}
else
// some programs store data in PVI memory and other random places. This is not supported.
if (quick_length > 0x1600)
if (quick_length > 0x2000)
{
image.seterror(IMAGE_ERROR_INVALIDIMAGE, "File too long");
image.message(" File too long");
}
else
{
for (i = quick_addr; i < quick_length; i++)
if (i < 0x1600)
space.write_byte(i, quick_data[i]);
space.write_byte(0x08be, quick_data[1]);
space.write_byte(0x08bf, quick_data[2]);
// load to 08C0-15FF (standard ram + extra)
int read_ = 0x1600;
if (quick_length < 0x1600)
read_ = quick_length;
for (i = 0x8c0; i < read_; i++)
space.write_byte(i, quick_data[i]);
// load to 1F50-1FAF (PVI regs)
read_ = 0x1FB0;
if (quick_length < 0x1FB0)
read_ = quick_length;
if (quick_length > 0x1FC0)
for (i = 0x1F50; i < read_; i++)
vc4000_video_w(space, i-0x1f00, quick_data[i]);
/* display a message about the loaded quickload */
image.message(" Quickload: size=%04X : exec=%04X",quick_length,exec_addr);