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author 0kmg <9137159+0kmg@users.noreply.github.com>2022-02-16 18:05:03 -0900
committer GitHub <noreply@github.com>2022-02-17 14:05:03 +1100
commit498ec2f0a4ddef3affcc6093525bfdbc327a145d (patch)
treeacfec53cf06395dd46281d9a3b49773c609b3825 /src/devices/bus/nes
parentddeb76eecb9f009b7cfbcb7b6b81ef7fa74fe5ae (diff)
bus/nes/rcm: Skeletonized 3D Block device for future work. (#9121)
Diffstat (limited to 'src/devices/bus/nes')
-rw-r--r--src/devices/bus/nes/rcm.cpp54
-rw-r--r--src/devices/bus/nes/rcm.h9
2 files changed, 5 insertions, 58 deletions
diff --git a/src/devices/bus/nes/rcm.cpp b/src/devices/bus/nes/rcm.cpp
index f3adba8a49d..8f09695a17a 100644
--- a/src/devices/bus/nes/rcm.cpp
+++ b/src/devices/bus/nes/rcm.cpp
@@ -14,9 +14,6 @@
* RCM Tetris Family 9in1 [mapper 61]
* RCM 3D Block [mapper 355]
- TODO:
- - implement PIC16C54 protection for 3D Block
-
***********************************************************************************************************/
@@ -70,8 +67,8 @@ nes_tf9_device::nes_tf9_device(const machine_config &mconfig, const char *tag, d
{
}
-nes_3dblock_device::nes_3dblock_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
- : nes_nrom_device(mconfig, NES_3DBLOCK, tag, owner, clock), m_irq_count(0)
+nes_3dblock_device::nes_3dblock_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
+ : nes_nrom_device(mconfig, NES_3DBLOCK, tag, owner, clock)
{
}
@@ -93,19 +90,12 @@ void nes_gs2015_device::pcb_reset()
void nes_3dblock_device::device_start()
{
common_start();
- save_item(NAME(m_reg));
- save_item(NAME(m_irq_count));
}
void nes_3dblock_device::pcb_reset()
{
prg32(0);
chr8(0, CHRRAM);
- m_reg[0] = 0;
- m_reg[1] = 0;
- m_reg[2] = 0;
- m_reg[3] = 0;
- m_irq_count = 0;
}
@@ -201,44 +191,8 @@ void nes_tf9_device::write_h(offs_t offset, u8 data)
NES 2.0: mapper 355
- In MESS: Very Preliminary Support. What is the purpose
- of the writes to $4800-$4900-$4a00? These writes
- also happens on the RCM version, which however works
- (probably an unused leftover code in that version)
+ In MAME: Not supported.
- FCEUmm suggests it might be IRQ related, but
- it does not seem to help much...
+ TODO: implement PIC16C54 protection
-------------------------------------------------*/
-
-void nes_3dblock_device::hblank_irq(int scanline, int vblank, int blanked)
-{
- if (m_irq_count)
- {
- m_irq_count--;
- if (!m_irq_count)
- hold_irq_line();
- }
-}
-
-void nes_3dblock_device::write_l(offs_t offset, uint8_t data)
-{
- LOG_MMC(("3dblock write_l, offset: %04x, data: %02x\n", offset, data));
- offset += 0x100;
-
- switch (offset)
- {
- case 0x800: // $4800
- m_reg[0] = data;
- break;
- case 0x900: // $4900
- m_reg[1] = data;
- break;
- case 0xa00: // $4a00
- m_reg[2] = data;
- break;
- case 0xe00: // $4e00
- m_reg[3] = data; m_irq_count = 0x10;
- break;
- }
-}
diff --git a/src/devices/bus/nes/rcm.h b/src/devices/bus/nes/rcm.h
index 0581d299f20..c3ce8140b88 100644
--- a/src/devices/bus/nes/rcm.h
+++ b/src/devices/bus/nes/rcm.h
@@ -76,20 +76,13 @@ class nes_3dblock_device : public nes_nrom_device
{
public:
// construction/destruction
- nes_3dblock_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+ nes_3dblock_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
- virtual void write_l(offs_t offset, uint8_t data) override;
-
- virtual void hblank_irq(int scanline, int vblank, int blanked) override;
virtual void pcb_reset() override;
protected:
// device-level overrides
virtual void device_start() override;
-
-private:
- uint8_t m_reg[4];
- uint8_t m_irq_count;
};