UINT8 pet_64k_expansion_device::pet_bd_r(address_space &space, offs_t offset, UINT8 data, int &sel)
{
if (BIT(m_ctrl, 7))
{
switch (sel)
{
case pet_expansion_slot_device::SEL8:
if (!BIT(m_ctrl, 5))
{
data = read_ram(offset);
sel = pet_expansion_slot_device::SEL_NONE;
}
break;
case pet_expansion_slot_device::SELE:
if (!BIT(m_ctrl, 6) || !BIT(offset, 11))
{
data = read_ram(offset);
sel = pet_expansion_slot_device::SEL_NONE;
}
break;
case pet_expansion_slot_device::SEL9:
case pet_expansion_slot_device::SELA:
case pet_expansion_slot_device::SELB:
case pet_expansion_slot_device::SELC:
case pet_expansion_slot_device::SELD:
case pet_expansion_slot_device::SELF:
data = read_ram(offset);
break;
}
}
return data;
}
/*
* Our main function we start of here...
* we should make sure that we never return from here, or vectrex will
* be surely bothered!
*/
int main(void)
{
unsigned char anim_state; /* our animation state counter */
signed char pacman_x; /* where is the pacman? */
signed char pacman_y;
pacman_x = 0;
pacman_y = 0;
anim_state = 0;
setup(); /* setup our program */
while (true) /* never to return... */
{
start_one_vectrex_round(); /* start 'de round */
intensity(MAX_BRIGHTNESS); /* set some brightness */
set_scale(MOVE_SCALE); /* set scale factor */
print_str(-128,100, "JOYTICK 1 TO MOVE PACMAN!"); /* a message! */
move_to(pacman_x, pacman_y); /* position pacman */
set_scale(PACMAN_SCALE); /* set scale factor for the sprite */
draw_vector_list(pacman[anim_state]); /* draw the current pacman */
anim_state++; /* next time the next animation */
if (anim_state == MAX_ANIM) /* could do a % MAXANIM, but this is */
anim_state = 0; /* more optimized */
if (!read_ram(Vec_Music_Flag)) /* music finished? */
play_song(SCRAMBLE_MUSIC); /* if so ... restart */
if (joystick1_x>0) /* check the joystick and */
{ /* update position */
pacman_x++;
}
else if (joystick1_x<0)
{
pacman_x--;
}
if (joystick1_y>0)
{
pacman_y++;
}
else if (joystick1_y<0)
{
pacman_y--;
}
if (pacman_x>=100) pacman_x = 100; /* make sure pacman is not */
if (pacman_x<=-100) pacman_x = -100; /* out of bounds */
if (pacman_y>=100) pacman_y = 100;
if (pacman_y<=-100) pacman_y = -100;
joy_digital(); /* call once per round, to insure */
} /* while (true) */ /* joystick information is up to date */
}
UINT8 abc1600_state::read_user_memory(offs_t offset)
{
int segment = (offset >> 15) & 0x1f;
int page = (offset >> 11) & 0x0f;
UINT16 page_data = PAGE_DATA(segment, page);
offs_t virtual_offset = ((page_data & 0x3ff) << 11) | (offset & 0x7ff);
//if (PAGE_NONX) BUS ERROR
UINT8 data = 0;
if (virtual_offset < 0x1fe000)
{
data = read_ram(virtual_offset);
}
else
{
data = read_io(virtual_offset);
}
return data;
}
inline UINT8 abc1600_state::dma_mreq_r(int index, UINT16 offset)
{
offs_t virtual_offset = get_dma_address(index, offset);
return read_ram(virtual_offset);
}