diff options
author | 2022-02-16 18:05:03 -0900 | |
---|---|---|
committer | 2022-02-17 14:05:03 +1100 | |
commit | 498ec2f0a4ddef3affcc6093525bfdbc327a145d (patch) | |
tree | acfec53cf06395dd46281d9a3b49773c609b3825 | |
parent | ddeb76eecb9f009b7cfbcb7b6b81ef7fa74fe5ae (diff) |
bus/nes/rcm: Skeletonized 3D Block device for future work. (#9121)
-rw-r--r-- | src/devices/bus/nes/rcm.cpp | 54 | ||||
-rw-r--r-- | src/devices/bus/nes/rcm.h | 9 |
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; }; |