Added support for SNES autodetection of 256 Kb SRAM in v2proto_hirom
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Joel Smith
parent
e9f47ec5d0
commit
4f56ea85a6
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@ -64,6 +64,7 @@ local ram_size_tbl = {
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[0x01] = "16 kilobits",
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[0x02] = "32 kilobits",
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[0x03] = "64 kilobits",
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[0x05] = "256 kilobits"
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}
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-- Translates ram size in header to KBytes.
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@ -72,6 +73,7 @@ local ram_size_kb_tbl = {
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[0x01] = 2,
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[0x02] = 4,
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[0x03] = 8,
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[0x05] = 32
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}
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local destination_code = {
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@ -288,7 +290,7 @@ end
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function print_header(internal_header)
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local map_mode_str = lorom_name
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if (internal_header["map_mode"] & 1) == 1 then map_mode_str = hirom_name end
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-- For each field, default to showing hex value so program doesn't crash if a value is unexpected.
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local rom_type_str = "UNKNOWN - " .. hexfmt(internal_header["rom_type"])
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if hardware_type[internal_header["rom_type"]] then rom_type_str = hardware_type[internal_header["rom_type"]] end
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@ -308,7 +310,7 @@ function print_header(internal_header)
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if developer_code[internal_header["developer_code"]] then
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developer_code_str = developer_code[internal_header["developer_code"]]
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end
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print("Rom Title:\t\t" .. internal_header["rom_name"])
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print("Map Mode:\t\t" .. map_mode_str .. " - " .. hexfmt(internal_header["map_mode"]))
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print("Hardware Type:\t\t" .. rom_type_str)
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@ -338,7 +340,7 @@ function get_header(map_adjust)
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local addr_destination_code = 0xFFD9 - map_adjust -- 1 byte
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local addr_developer_code = 0xFFDA - map_adjust -- 1 byte (This is actually manufacturer ID)
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local addr_version = 0xFFDB - map_adjust -- 1 byte
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local addr_compliment_check = 0xFFDC - map_adjust -- 2 bytes
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local addr_compliment_check = 0xFFDC - map_adjust -- 2 bytes
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local addr_checksum = 0xFFDD - map_adjust -- 2 bytes
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local internal_header = {
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@ -374,7 +376,7 @@ function isvalidheader(internal_header)
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return valid_rom_type and valid_rom_size and valid_sram_size and valid_destination_code
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end
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function test()
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function test()
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local hirom_header = get_header(0x0000)
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local lorom_header = get_header(0x8000)
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local internal_header = nil
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@ -396,7 +398,7 @@ end
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-- local functions
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-- Desc: attempt to read flash rom ID
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-- Desc: attempt to read flash rom ID
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-- Pre: snes_init() been called to setup i/o
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-- Post:Address left on bus memories disabled
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-- Rtn: true if proper flash ID found
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@ -650,7 +652,7 @@ local function flash_rom(file, rom_size_KB, mapping, debug)
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--program the entire bank's worth of data
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--[[ This version of the code programs a single byte at a time but doesn't require
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--[[ This version of the code programs a single byte at a time but doesn't require
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-- board specific functions in the firmware
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print("This is slow as molasses, but gets the job done")
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byte_num = 0 --current byte within the bank
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@ -703,7 +705,7 @@ local function wr_ram(file, first_bank, ram_size_KB, mapping, debug)
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--last of 512KB
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-- dict.snes("SNES_SET_BANK", 0x0F) wr_flash_byte(0x8000, 0xF5, true) wr_flash_byte(0xFFFF, 0xFA, true)
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local base_addr
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local base_addr
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local bank_size
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local buff_size = 1 --number of bytes to write at a time
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local cur_bank = 0
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@ -750,7 +752,7 @@ local function wr_ram(file, first_bank, ram_size_KB, mapping, debug)
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--program the entire bank's worth of data
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---[[ This version of the code programs a single byte at a time but doesn't require
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---[[ This version of the code programs a single byte at a time but doesn't require
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-- board specific functions in the firmware
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print("This is slow as molasses, but gets the job done")
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byte_num = 0 --current byte within the bank
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@ -794,18 +796,18 @@ end
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--Cart should be in reset state upon calling this function
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--Cart should be in reset state upon calling this function
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--this function processes all user requests for this specific board/mapper
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local function process(process_opts, console_opts)
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local rv = nil
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local file
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local file
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--initialize device i/o for SNES
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dict.io("IO_RESET")
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dict.io("SNES_INIT")
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local internal_header = nil
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-- Use specified mapper if provided, otherwise autodetect.
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local snes_mapping = console_opts["mapper"]
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if (snes_mapping == lorom_name) then
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@ -825,12 +827,12 @@ local function process(process_opts, console_opts)
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-- Use specified ram size if provided, otherwise autodetect.
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local ram_size = console_opts["wram_size_kb"]
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-- Use specified rom size if provided, otherwise autodetect.
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local rom_size = console_opts["rom_size_kbyte"]
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-- TODO: Put this in a function.
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-- SNES memory map banking
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@ -839,8 +841,8 @@ local function process(process_opts, console_opts)
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-- A23 splits the map in half
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-- A22 splits it in quarters (between what's typically low half and high half)
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-- b 7 6 5 4 : 3 2 1 0
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-- A23 22 21 20 : 19 18 17 16
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-- A23 22 21 20 : 19 18 17 16
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local rombank --first bank of rom byte that contains A23-16
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local rambank --first bank of ram
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@ -852,8 +854,8 @@ local function process(process_opts, console_opts)
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print_header(internal_header)
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-- Autodetect any missing parameters.
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if isempty(snes_mapping) then
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snes_mapping = internal_header["mapping"]
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if isempty(snes_mapping) then
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snes_mapping = internal_header["mapping"]
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print("Mapping not provided, " .. snes_mapping .. " detected.")
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if (snes_mapping == lorom_name) then
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-- LOROM typically sees the upper half (A15=1) of the first address 0b0000:1000_0000
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@ -865,7 +867,7 @@ local function process(process_opts, console_opts)
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rombank = 0xC0
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--rombank = 0x40 --second HiROM bank (slow)
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rambank = 0x30
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end
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end
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end
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if ram_size == 0 then
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@ -887,7 +889,7 @@ local function process(process_opts, console_opts)
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end
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--dump the ram to file
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--dump the ram to file
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if dumpram then
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print("\nDumping SAVE RAM...")
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@ -950,7 +952,7 @@ local function process(process_opts, console_opts)
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--open file
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file = assert(io.open(flashfile, "rb"))
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--determine if auto-doubling, deinterleaving, etc,
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--determine if auto-doubling, deinterleaving, etc,
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--needs done to make board compatible with rom
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--flash cart
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