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This commit is contained in:
Michaël Banaan Ananas 2014-07-27 08:06:44 +00:00
parent 0bfa41b002
commit 3457a0b80d
1 changed files with 8 additions and 4 deletions
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12
src/mess/drivers/cc40.c
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@ -49,7 +49,11 @@
CC-40 is powered by 4 AA batteries. These will also save internal RAM,
provided that the machine is turned off properly. If a program is running,
you may have to press [BREAK] before turning the CC-40 off.
you may have to press [BREAK] before turning the CC-40 off. If RAM contents
ends up dodgy somehow, just delete the nvram files.
Officially, minimum total RAM size is 6KB. The system will still boot with less,
but don't expect all software to work properly.
To run a cartridge, usually the command RUN "DIR" shows which program(s)
can be loaded. Load a program by pressing the [RUN] key while viewing the list,
@ -407,7 +411,7 @@ static INPUT_PORTS_START( cc40 )
PORT_CONFSETTING( 0x01, "2KB" )
PORT_CONFSETTING( 0x04, "8KB" )
PORT_CONFNAME( 0x70, 0x10, "RAM Chip 2") PORT_CHANGED_MEMBER(DEVICE_SELF, cc40_state, sysram_size_changed, (void *)1)
PORT_CONFSETTING( 0x00, "None" )
PORT_CONFSETTING( 0x00, "None" ) // note: invalid configuration, unless Chip 1 is also 0x00
PORT_CONFSETTING( 0x10, "2KB" )
PORT_CONFSETTING( 0x40, "8KB" )
@ -550,8 +554,8 @@ void cc40_state::machine_start()
m_nvram[0] = machine().device<nvram_device>("sysram.1");
m_nvram[1] = machine().device<nvram_device>("sysram.2");
init_sysram(0, 0x800);
init_sysram(1, 0x800);
init_sysram(0, 0x800); // default to 6KB
init_sysram(1, 0x800); // "
address_space &space = m_maincpu->space(AS_PROGRAM);
bus_control_w(space, 0, 0);