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(MESS) electron.c: Added cartridge support. [Wilbert Pol]

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This commit is contained in:
Wilbert Pol 2013-05-04 18:34:31 +00:00
parent 8830be5c08
commit c41d2e4e1c
3 changed files with 64 additions and 1 deletions
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13
src/mess/drivers/electron.c
View File

@ -13,9 +13,11 @@ Incomplete:
- Graphics (seems to be wrong for several games)
- 1 MHz bus is not emulated
- Bus claiming by ULA is not implemented
- Currently the cartridge support always loads the upper rom in page 12
and the lower rom in page 0. This might need further documentation in
the software list and loading code.
Missing:
- Support for ROM images
- Support for floppy disks
- Other peripherals
- Keyboard is missing the 'Break' key
@ -26,6 +28,7 @@ Missing:
#include "cpu/m6502/m6502.h"
#include "includes/electron.h"
#include "imagedev/cassette.h"
#include "imagedev/cartslot.h"
#include "formats/uef_cas.h"
#include "sound/beep.h"
@ -196,6 +199,14 @@ static MACHINE_CONFIG_START( electron, electron_state )
MCFG_SOUND_ROUTE( ALL_OUTPUTS, "mono", 1.00 )
MCFG_CASSETTE_ADD( "cassette", electron_cassette_interface )
MCFG_CARTSLOT_ADD("cart")
MCFG_CARTSLOT_EXTENSION_LIST("bin")
MCFG_CARTSLOT_NOT_MANDATORY
MCFG_CARTSLOT_LOAD(electron_state, electron_cart)
MCFG_CARTSLOT_INTERFACE("electron_cart")
/* software lists */
MCFG_SOFTWARE_LIST_ADD("cart_list","electron_cart")
MACHINE_CONFIG_END

1
src/mess/includes/electron.h
View File

@ -90,6 +90,7 @@ public:
inline UINT8 read_vram( UINT16 addr );
inline void electron_plot_pixel(bitmap_ind16 &bitmap, int x, int y, UINT32 color);
void electron_interrupt_handler(int mode, int interrupt);
DECLARE_DEVICE_IMAGE_LOAD_MEMBER( electron_cart );
};

51
src/mess/machine/electron.c
View File

@ -338,3 +338,54 @@ void electron_state::machine_start()
machine().scheduler().timer_set(attotime::zero, timer_expired_delegate(FUNC(electron_state::setup_beep),this));
m_tape_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(electron_state::electron_tape_timer_handler),this));
}
DEVICE_IMAGE_LOAD_MEMBER( electron_state, electron_cart )
{
UINT8 *user1 = memregion("user1")->base() + 0x4000;
if (image.software_entry() == NULL)
{
UINT32 filesize = image.length();
if ( filesize != 16384 )
{
image.seterror(IMAGE_ERROR_UNSPECIFIED, "Invalid size. Only size 16384 is supported");
return IMAGE_INIT_FAIL;
}
if (image.fread( user1 + 12 * 16384, filesize) != filesize)
{
image.seterror(IMAGE_ERROR_UNSPECIFIED, "Error loading file");
return IMAGE_INIT_FAIL;
}
return IMAGE_INIT_PASS;
}
int upsize = image.get_software_region_length("uprom");
int losize = image.get_software_region_length("lorom");
if ( upsize != 16384 && upsize != 0 )
{
image.seterror(IMAGE_ERROR_UNSPECIFIED, "Invalid size for uprom");
return IMAGE_INIT_FAIL;
}
if ( losize != 16384 && losize != 0 )
{
image.seterror(IMAGE_ERROR_UNSPECIFIED, "Invalid size for lorom");
return IMAGE_INIT_FAIL;
}
if ( upsize )
{
memcpy( user1 + 12 * 16384, image.get_software_region("uprom"), upsize );
}
if ( losize )
{
memcpy( user1 + 0 * 16384, image.get_software_region("lorom"), losize );
}
return IMAGE_INIT_PASS;
}