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https://github.com/holub/mame
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bus/vboy: cartridge is 16 bits wide (not 32) but we'll keep pretending for program ROM (nw)
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Vas Crabb
parent
b9afe742e6
commit
774cc7ce43
@ -71,7 +71,7 @@ According to Planet Virtual Boy, the following undumped protos exist
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<dataarea name="rom" size="2097152" width="32" endianness="little">
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<rom name="golf (usa).bin" size="2097152" crc="2199af41" sha1="23ce3c174789cdd306497d86cb2c4e76ba8b06e5" offset="000000" />
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</dataarea>
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<dataarea name="sram" size="0x10000" width="32" endianness="little">
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<dataarea name="sram" size="0x10000" width="16" endianness="little">
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</dataarea>
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</part>
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</software>
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@ -286,7 +286,7 @@ According to Planet Virtual Boy, the following undumped protos exist
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<dataarea name="rom" size="1048576" width="32" endianness="little">
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<rom name="teleroboxer (japan, usa).bin" size="1048576" crc="36103000" sha1="c59e020f9674774c5cbc022317ebba0eb1d744f7" offset="000000" />
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</dataarea>
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<dataarea name="sram" size="0x10000" width="32" endianness="little">
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<dataarea name="sram" size="0x10000" width="16" endianness="little">
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</dataarea>
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</part>
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</software>
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@ -335,7 +335,7 @@ According to Planet Virtual Boy, the following undumped protos exist
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<dataarea name="rom" size="1048576" width="32" endianness="little">
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<rom name="vue-vvfj-0.u1" size="1048576" crc="526cc969" sha1="583b409b7215159219d08e789db46140062095f2" offset="000000" />
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</dataarea>
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<dataarea name="sram" size="0x10000" width="32" endianness="little">
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<dataarea name="sram" size="0x10000" width="16" endianness="little">
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</dataarea>
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</part>
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</software>
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@ -379,7 +379,7 @@ According to Planet Virtual Boy, the following undumped protos exist
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<dataarea name="rom" size="2097152" width="32" endianness="little">
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<rom name="t&e virtual golf (japan).bin" size="2097152" crc="6ba07915" sha1="c595285d42c69f14b2b418c1edfbe4a7f9a624b6" offset="000000" />
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</dataarea>
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<dataarea name="sram" size="0x10000" width="32" endianness="little">
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<dataarea name="sram" size="0x10000" width="16" endianness="little">
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</dataarea>
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</part>
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</software>
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@ -453,7 +453,7 @@ According to Planet Virtual Boy, the following undumped protos exist
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<dataarea name="rom" size="2097152" width="32" endianness="little">
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<rom name="virtual boy wario land (japan, usa).bin" size="2097152" crc="133e9372" sha1="274c328fbd904f20e69172ab826bf8f94ced1bdb" offset="000000" />
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</dataarea>
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<dataarea name="sram" size="0x10000" width="32" endianness="little">
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<dataarea name="sram" size="0x10000" width="16" endianness="little">
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</dataarea>
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</part>
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</software>
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@ -51,6 +51,12 @@ image_init_result vboy_flat_rom_device::load()
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// this should fail a validity check
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assert(!(rom_base() & 0x00ff'ffff));
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// This is a simplification that improves performance. In
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// reality, cartridge ROM is 16 bits wide and 32-bit accesses
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// are split up automatically. MAME doesn't really support
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// dynamic bus sizing, and it's a lot faster to execute from a
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// ROM handler than to go through the trampolines necessary to
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// emulate 16-bit accesses.
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device_generic_cart_interface::install_non_power_of_two<2>(
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romregion->bytes() >> 2,
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0x00ff'ffff >> 2,
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@ -105,36 +111,6 @@ image_init_result vboy_flat_rom_sram_device::load()
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switch (sramregion->bitwidth())
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{
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case 8:
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if (chip_space())
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{
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device_generic_cart_interface::install_non_power_of_two<2>(
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sramregion->bytes(),
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0x00ff'ffff >> 2,
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0,
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0,
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chip_base(),
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[this, sramregion] (offs_t begin, offs_t end, offs_t mirror, offs_t src)
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{
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LOG(
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"Install SRAM 0x%08X-0x%08X at 0x%08X-0x%08X mirror %08X\n",
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src,
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src + ((end - begin) >> 2),
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begin,
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end,
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mirror);
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u8 *const base(&reinterpret_cast<u8 *>(sramregion->base())[src]);
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chip_space()->install_readwrite_handler(
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begin,
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end,
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read8sm_delegate(*this, NAME([base] (offs_t offset) { return base[offset]; })),
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write8sm_delegate(*this, NAME([base] (offs_t offset, u8 data) { base[offset] = data; })),
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0x0000'00ff);
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});
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}
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save_pointer(NAME(&sramregion->as_u8()), sramregion->bytes());
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break;
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case 16:
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if (chip_space())
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{
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device_generic_cart_interface::install_non_power_of_two<2>(
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@ -152,19 +128,19 @@ image_init_result vboy_flat_rom_sram_device::load()
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begin,
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end,
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mirror);
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u16 *const base(&reinterpret_cast<u16 *>(sramregion->base())[src]);
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u8 *const base(&reinterpret_cast<u8 *>(sramregion->base())[src << 1]);
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chip_space()->install_readwrite_handler(
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begin,
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end,
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read16s_delegate(*this, NAME([base] (offs_t offset, u16 mem_mask) { return base[offset]; })),
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write16s_delegate(*this, NAME([base] (offs_t offset, u16 data, u16 mem_mask) { COMBINE_DATA(base + offset); })),
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0x0000'ffff);
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read8sm_delegate(*this, NAME([base] (offs_t offset) { return base[offset]; })),
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write8sm_delegate(*this, NAME([base] (offs_t offset, u8 data) { base[offset] = data; })),
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0x00ff'00ff);
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});
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}
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save_pointer(NAME(&sramregion->as_u16()), sramregion->bytes() >> 1);
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save_pointer(NAME(&sramregion->as_u8()), sramregion->bytes());
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break;
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case 32:
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case 16:
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if (chip_space())
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{
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device_generic_cart_interface::install_non_power_of_two<2>(
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@ -173,7 +149,7 @@ image_init_result vboy_flat_rom_sram_device::load()
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0,
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0,
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chip_base(),
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[this, sram = reinterpret_cast<u32 *>(sramregion->base())] (offs_t begin, offs_t end, offs_t mirror, offs_t src)
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[this, sramregion] (offs_t begin, offs_t end, offs_t mirror, offs_t src)
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{
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LOG(
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"Install SRAM 0x%08X-0x%08X at 0x%08X-0x%08X mirror %08X\n",
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@ -182,10 +158,16 @@ image_init_result vboy_flat_rom_sram_device::load()
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begin,
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end,
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mirror);
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chip_space()->install_ram(begin, end, mirror, &sram[src]);
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u16 *const base(&reinterpret_cast<u16 *>(sramregion->base())[src << 1]);
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chip_space()->install_readwrite_handler(
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begin,
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end,
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read16s_delegate(*this, NAME([base] (offs_t offset, u16 mem_mask) { return base[offset]; })),
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write16s_delegate(*this, NAME([base] (offs_t offset, u16 data, u16 mem_mask) { COMBINE_DATA(base + offset); })),
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0xffff'ffff);
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});
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}
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save_pointer(NAME(&sramregion->as_u32()), sramregion->bytes() >> 2);
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save_pointer(NAME(&sramregion->as_u16()), sramregion->bytes() >> 1);
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break;
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default:
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@ -201,6 +183,8 @@ image_init_result vboy_flat_rom_sram_device::load()
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void vboy_flat_rom_sram_device::unload()
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{
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vboy_flat_rom_device::unload();
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memory_region *const sramregion(memregion("^sram"));
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if (sramregion)
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battery_save(sramregion->base(), sramregion->bytes());
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@ -2,6 +2,9 @@
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// copyright-holders:Vas Crabb
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/***************************************************************************
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Virtual Boy cartridge slot
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TODO:
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- Sound capabilities
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***************************************************************************/
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#include "emu.h"
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