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[patinho] Implemented methods for loading punched tape images as well as raw data into RAM.

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This commit is contained in:
Felipe Corrêa da Silva Sanches 2015-12-01 13:13:32 -02:00
parent 32db54e38f
commit d7d12bb39e
1 changed files with 31 additions and 6 deletions
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37
src/mame/drivers/patinho_feio.cpp
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@ -16,6 +16,8 @@ public:
{ } { }
DECLARE_DRIVER_INIT(patinho_feio); DECLARE_DRIVER_INIT(patinho_feio);
void load_tape(const char* name);
void load_raw_data(const char* name, unsigned int start_address, unsigned int data_length);
virtual void machine_start(); virtual void machine_start();
// virtual void machine_reset(); // virtual void machine_reset();
// required_device<patinho_feio_cpu_device> m_maincpu; // required_device<patinho_feio_cpu_device> m_maincpu;
@ -28,24 +30,47 @@ DRIVER_INIT_MEMBER(patinho_feio_state, patinho_feio)
{ {
} }
void patinho_feio_state::load_tape(const char* name){
UINT8 *RAM = (UINT8 *) memshare("maincpu:internalram")->ptr();
UINT8 *data = memregion(name)->base();
unsigned int data_length = data[0];
unsigned int start_address = data[1]*256 + data[2];
INT8 expected_checksum = data[data_length + 3];
INT8 checksum = 0;
for (int i = 0; i < data_length + 3; i++){
checksum -= (INT8) data[i];
}
if (checksum != expected_checksum){
printf("[WARNING] Tape \"%s\": checksum = 0x%02X (expected 0x%02X)\n",
name, (unsigned char) checksum, (unsigned char) expected_checksum);
}
memcpy(&RAM[start_address], &data[3], data_length);
}
void patinho_feio_state::load_raw_data(const char* name, unsigned int start_address, unsigned int data_length){
UINT8 *RAM = (UINT8 *) memshare("maincpu:internalram")->ptr();
UINT8 *data = memregion(name)->base();
memcpy(&RAM[start_address], data, data_length);
}
void patinho_feio_state::machine_start(){ void patinho_feio_state::machine_start(){
// Copy some programs directly into RAM. // Copy some programs directly into RAM.
// This is a hack for setting up the computer // This is a hack for setting up the computer
// while we don't support loading programs // while we don't support loading programs
// from punched tape rolls... // from punched tape rolls...
UINT8 *RAM = (UINT8 *) memshare("maincpu:internalram")->ptr();
UINT8 *program;
//"absolute program example" from page 16.7 //"absolute program example" from page 16.7
// Prints "PATINHO FEIO" on the DECWRITER: // Prints "PATINHO FEIO" on the DECWRITER:
program = memregion("exemplo_16.7")->base(); load_tape("exemplo_16.7");
memcpy(&RAM[0x003], program, 0x028);
//"absolute program example" from appendix G: //"absolute program example" from appendix G:
// Allows users to load programs from the // Allows users to load programs from the
// console into the computer memory. // console into the computer memory.
program = memregion("hexam")->base(); load_raw_data("hexam", 0xE00, 0x0D5);
memcpy(&RAM[0xE00], program, 0x0D5);
} }
static INPUT_PORTS_START( patinho_feio ) static INPUT_PORTS_START( patinho_feio )