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Merge pull request #63 from retro-wertz/fix_gba_siocnt

libretro: add SIO Control, normal mode reg
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twinaphex committed Jul 23, 2019
2 parents 7df7b19 + 53ce6fb commit d1fcffc8c4b3f7bec85e1387816a20901b8a6b9b
Showing with 23 additions and 1 deletion.
  1. +23 −1 src/libretro/libretro.cpp
@@ -90,14 +90,19 @@ bool EmuReseted;
int winGbPrinterEnabled;
bool gba_joybus_active = false;

#define UPDATE_REG(address, value) WRITE16LE(((uint16_t*)&ioMem[address]), value)

LinkMode GetLinkMode()
{
return LINK_DISCONNECTED;
}

void StartGPLink(uint16_t value)
{
WRITE16LE(((uint16_t*)&ioMem[COMM_RCNT]), value);
if (!ioMem)
return;

UPDATE_REG(COMM_RCNT, value);
}

void LinkUpdate(int ticks)
@@ -106,6 +111,23 @@ void LinkUpdate(int ticks)

void StartLink(uint16_t siocnt)
{
/* log("'s' siocnt = %04x\n", siocnt); */

if (!ioMem)
return;

if(siocnt & 0x80)
{
siocnt &= 0xff7f;
if(siocnt & 1 && (siocnt & 0x4000))
{
UPDATE_REG(COMM_SIOCNT, 0xFF);
IF |= 0x80;
UPDATE_REG(0x202, IF);
siocnt &= 0x7f7f;
}
}
UPDATE_REG(COMM_SIOCNT, siocnt);
}

void CheckLinkConnection()

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