*
****************************************************************************************/
-#include "shared.h"
+#include "../pico_int.h"
+#include "../cd/genplus_macros.h"
+#include "eeprom_spi.h"
/* max supported size 64KB (25x512/95x512) */
#define SIZE_MASK 0xffff
static T_EEPROM_SPI spi_eeprom;
-void eeprom_spi_init()
+void *eeprom_spi_init(int *size)
{
/* reset eeprom state */
memset(&spi_eeprom, 0, sizeof(T_EEPROM_SPI));
spi_eeprom.out = 1;
spi_eeprom.state = GET_OPCODE;
- /* enable backup RAM */
- sram.custom = 2;
- sram.on = 1;
+ if (size)
+ *size = sizeof(T_EEPROM_SPI);
+ return &spi_eeprom;
}
void eeprom_spi_write(unsigned char data)
if (spi_eeprom.opcode & 0x01)
{
/* READ operation */
- spi_eeprom.buffer = sram.sram[spi_eeprom.addr];
+ spi_eeprom.buffer = SRam.data[spi_eeprom.addr];
spi_eeprom.state = READ_BYTE;
}
else
/* $C000-$FFFF (sector #3) is protected */
if (spi_eeprom.addr < 0xC000)
{
- sram.sram[spi_eeprom.addr] = spi_eeprom.buffer;
+ SRam.data[spi_eeprom.addr] = spi_eeprom.buffer;
}
break;
}
/* $8000-$FFFF (sectors #2 and #3) is protected */
if (spi_eeprom.addr < 0x8000)
{
- sram.sram[spi_eeprom.addr] = spi_eeprom.buffer;
+ SRam.data[spi_eeprom.addr] = spi_eeprom.buffer;
}
break;
}
default:
{
/* no sectors protected */
- sram.sram[spi_eeprom.addr] = spi_eeprom.buffer;
+ SRam.data[spi_eeprom.addr] = spi_eeprom.buffer;
break;
}
}
{
/* read next array byte */
spi_eeprom.addr = (spi_eeprom.addr + 1) & SIZE_MASK;
- spi_eeprom.buffer = sram.sram[spi_eeprom.addr];
+ spi_eeprom.buffer = SRam.data[spi_eeprom.addr];
}
}
}