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hp64k: slot selection & lower 32k RAM added (working?)

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This commit is contained in:
fulivi 2015-06-12 14:59:42 +02:00
parent 6360c43ba7
commit da5de0d3d9
1 changed files with 68 additions and 1 deletions
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69
src/mess/drivers/hp64k.c
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@ -30,7 +30,7 @@ class hp64k_state : public driver_device
public:
hp64k_state(const machine_config &mconfig, device_type type, const char *tag);
//virtual void driver_start();
virtual void driver_start();
//virtual void machine_start();
virtual void video_start();
virtual void machine_reset();
@ -54,6 +54,10 @@ public:
TIMER_DEVICE_CALLBACK_MEMBER(hp64k_line_sync);
DECLARE_READ16_MEMBER(hp64k_deltat_r);
DECLARE_WRITE16_MEMBER(hp64k_deltat_w);
DECLARE_READ16_MEMBER(hp64k_slot_r);
DECLARE_WRITE16_MEMBER(hp64k_slot_w);
DECLARE_WRITE16_MEMBER(hp64k_slot_sel_w);
private:
required_device<hp_5061_3011_cpu_device> m_cpu;
required_device<i8275_device> m_crtc;
@ -79,10 +83,16 @@ private:
UINT8 m_kb_row_col;
bool m_kb_scan_on;
bool m_kb_pressed;
// Slot selection
std::vector<UINT16> m_low32k_ram;
UINT8 m_slot_select;
UINT8 m_slot_map;
};
static ADDRESS_MAP_START(cpu_mem_map , AS_PROGRAM , 16 , hp64k_state)
AM_RANGE(0x0000 , 0x3fff) AM_ROM
AM_RANGE(0x4000 , 0x7fff) AM_READWRITE(hp64k_slot_r , hp64k_slot_w)
AM_RANGE(0x8000 , 0x8001) AM_WRITE(hp64k_crtc_w)
AM_RANGE(0x8002 , 0xffff) AM_RAM
ADDRESS_MAP_END
@ -97,6 +107,9 @@ static ADDRESS_MAP_START(cpu_io_map , AS_IO , 16 , hp64k_state)
// PA = 7, IC = 2
// Rear-panel switches
AM_RANGE(HP_MAKE_IOADDR(7 , 2) , HP_MAKE_IOADDR(7 , 2)) AM_READ(hp64k_rear_sw_r)
// PA = 10, IC = [0..3]
// Slot selection
AM_RANGE(HP_MAKE_IOADDR(10 , 0) , HP_MAKE_IOADDR(10 , 3)) AM_WRITE(hp64k_slot_sel_w)
// PA = 12, IC = [0..3]
// Interrupt mask
AM_RANGE(HP_MAKE_IOADDR(12 , 0) , HP_MAKE_IOADDR(12 , 3)) AM_WRITE(hp64k_irl_mask_w)
@ -114,6 +127,12 @@ hp64k_state::hp64k_state(const machine_config &mconfig, device_type type, const
{
}
void hp64k_state::driver_start()
{
// 32kW for lower RAM
m_low32k_ram.resize(0x8000);
}
void hp64k_state::video_start()
{
m_chargen = memregion("chargen")->base();
@ -129,6 +148,8 @@ void hp64k_state::machine_reset()
memset(&m_kb_state[ 0 ] , 0 , sizeof(m_kb_state));
m_kb_row_col = 0;
m_kb_scan_on = true;
m_slot_select = 0;
m_slot_map = 3;
}
UINT8 hp64k_state::hp64k_crtc_filter(UINT8 data)
@ -304,6 +325,52 @@ WRITE16_MEMBER(hp64k_state::hp64k_deltat_w)
hp64k_update_irl();
}
READ16_MEMBER(hp64k_state::hp64k_slot_r)
{
if (m_slot_select == 0x0a) {
// Slot 10 selected
// On this (fictional) slot is allocated the lower 32KW of RAM
switch (m_slot_map) {
case 0:
// IDEN
// ID of 32KW RAM expansion
return 0x402;
case 1:
// MAP1
// Lower half of RAM
return m_low32k_ram[ offset ];
default:
// MAP2&3
// Upper half of RAM
return m_low32k_ram[ offset + 0x4000 ];
}
} else {
return 0;
}
}
WRITE16_MEMBER(hp64k_state::hp64k_slot_w)
{
if (m_slot_select == 0x0a && m_slot_map != 0) {
if (m_slot_map != 1) {
// MAP2&3
offset += 0x4000;
}
logerror("slot_w %u %04x %04x\n" , offset , data , mem_mask);
m_low32k_ram[ offset ] &= ~mem_mask;
m_low32k_ram[ offset ] |= (data & mem_mask);
}
}
WRITE16_MEMBER(hp64k_state::hp64k_slot_sel_w)
{
m_slot_map = (UINT8)offset;
m_slot_select = (UINT8)((data >> 8) & 0x3f);
}
static INPUT_PORTS_START(hp64k)
// Keyboard is arranged in a 8 x 16 matrix. Of the 128 possible positions, only 77 are used.
// For key arrangement on the matrix, see [1] pg 334