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Fix "No EEPROM present" Joybus status response

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This commit is contained in:
Christopher Bonhage 2021-06-24 07:09:06 -04:00
parent 5503dd0efb
commit a87c2d70f6
1 changed files with 20 additions and 7 deletions
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27
si/controller.c
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@ -122,13 +122,26 @@ int pif_perform_command(struct si_controller *si,
break;
case 4:
// XXX hack alert: this returns 16k EEPROM in the case of a
// 16k EEPROM and returns 4k EEPROM in all other cases. This
// is likely a hack to make games that expect EEPROM work,
// even if the user doesn't supply one on the command line.
recv_buf[0] = 0x00;
recv_buf[1] = si->eeprom.size == 0x800 ? 0xC0 : 0x80;
recv_buf[2] = 0x00;
switch (si->eeprom.size) {
case 0: // No EEPROM present
recv_buf[0] = 0xFF;
recv_buf[1] = 0xFF;
recv_buf[2] = 0xFF;
break;
case 0x200: // 4 kbit EEPROM
recv_buf[0] = 0x00;
recv_buf[1] = 0x80;
recv_buf[2] = 0x00;
break;
case 0x800: // 16 kbit EEPROM
recv_buf[0] = 0x00;
recv_buf[1] = 0xC0;
recv_buf[2] = 0x00;
break;
default: // Invalid EEPROM size
assert(0 && "Invalid EEPROM size.");
return 1;
}
break;
default: