void c64_256k_cia_set_vbank(int ciabank)
{
cia_vbank=ciabank;
video_bank_segment=((c64_256k_PRB&0xc0)>>4)+cia_vbank;
vicii_set_ram_base(c64_256k_ram+(video_bank_segment*0x4000));
mem_set_vbank(0);
}
static void perform_vbank_switch(int vbank)
{
if (c64_256k_enabled) {
c64_256k_cia_set_vbank(vbank);
} else {
mem_set_vbank(vbank);
}
}
static void undump_ciapa(cia_context_t *cia_context, CLOCK rclk, BYTE byte)
{
#ifdef HAVE_RS232
if (rsuser_enabled) {
rsuser_set_tx_bit((int)(byte & 4));
}
#endif
vbank = (byte ^ 3) & 3;
mem_set_vbank(vbank);
iecbus_cpu_undump((BYTE)(byte ^ 0xff));
}
static void do_reset_cia(cia_context_t *cia_context)
{
printer_userport_write_strobe(1);
printer_userport_write_data((BYTE)0xff);
#ifdef HAVE_RS232
rsuser_write_ctrl((BYTE)0xff);
rsuser_set_tx_bit(1);
#endif
vbank = 0;
mem_set_vbank(vbank);
}
static void do_reset_cia(cia_context_t *cia_context)
{
store_userport_pbx(0xff);
/* The functions below will gradually be removed as the functionality is added to the new userport system. */
#if defined(HAVE_RS232DEV) || defined(HAVE_RS232NET)
rsuser_write_ctrl((BYTE)0xff);
rsuser_set_tx_bit(1);
#endif
vbank = 0;
mem_set_vbank(vbank);
}
static void store_ciapa(cia_context_t *cia_context, CLOCK rclk, BYTE byte)
{
if (cia_context->old_pa != byte) {
BYTE tmp;
int new_vbank;
#if defined(HAVE_RS232DEV) || defined(HAVE_RS232NET)
if (rsuser_enabled && ((cia_context->old_pa ^ byte) & 0x04)) {
rsuser_set_tx_bit(byte & 4);
}
#endif
tmp = ~byte;
new_vbank = tmp & 3;
if (new_vbank != vbank) {
vbank = new_vbank;
mem_set_vbank(new_vbank);
}
(*iecbus_callback_write)((BYTE)tmp, maincpu_clk);
}
}
void c64_256k_reset(void)
{
c64_256k_DDA=0;
c64_256k_DDB=0;
c64_256k_PRA=0xdc;
c64_256k_PRB=0xfe;
c64_256k_CRA=4;
c64_256k_CRB=4;
cia_vbank=0;
video_bank_segment=0xc;
c64_256k_segment0=0xc;
c64_256k_segment1=0xd;
c64_256k_segment2=0xe;
c64_256k_segment3=0xf;
if (c64_256k_enabled)
{
vicii_set_ram_base(c64_256k_ram+0x30000);
mem_set_vbank(0);
}
}
static void store_ciapa(cia_context_t *cia_context, CLOCK rclk, BYTE byte)
{
if (cia_context->old_pa != byte) {
BYTE tmp;
int new_vbank;
#ifdef HAVE_RS232
if (rsuser_enabled && ((cia_context->old_pa ^ byte) & 0x04)) {
rsuser_set_tx_bit(byte & 4);
}
#endif
tmp = ~byte;
new_vbank = tmp & 3;
if (new_vbank != vbank) {
vbank = new_vbank;
if (c64_256k_enabled)
c64_256k_cia_set_vbank(new_vbank);
else
mem_set_vbank(new_vbank);
}
(*iecbus_callback_write)((BYTE)tmp, maincpu_clk);
printer_userport_write_strobe(tmp & 0x04);
}
}
static void perform_vbank_switch(int vbank)
{
mem_set_vbank(vbank);
}
