124 lines
2.9 KiB
Lua
124 lines
2.9 KiB
Lua
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-- create the module's table
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local nrom = {}
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-- import required modules
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local dict = require "scripts.app.dict"
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local dump = require "scripts.app.dump"
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local flash = require "scripts.app.flash"
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-- file constants
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-- local functions
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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( read, erase, program, verify, dumpfile, flashfile, verifyfile)
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local rv = nil
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local file
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--initialize device i/o for NES
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dict.io("IO_RESET")
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dict.io("NES_INIT")
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--dump the cart to dumpfile
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if read then
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file = assert(io.open(dumpfile, "wb"))
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--dump cart into file
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dump.dumptofile( file, 32, "NROM", "PRGROM", true )
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dump.dumptofile( file, 8, "NROM", "CHRROM", true )
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--close file
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assert(file:close())
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end
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--erase the cart
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if erase then
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print("erasing NROM");
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print("erasing PRG-ROM");
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dict.nes("DISCRETE_EXP0_PRGROM_WR", 0x5555, 0xAA)
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dict.nes("DISCRETE_EXP0_PRGROM_WR", 0x2AAA, 0x55)
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dict.nes("DISCRETE_EXP0_PRGROM_WR", 0x5555, 0x80)
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dict.nes("DISCRETE_EXP0_PRGROM_WR", 0x5555, 0xAA)
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dict.nes("DISCRETE_EXP0_PRGROM_WR", 0x2AAA, 0x55)
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dict.nes("DISCRETE_EXP0_PRGROM_WR", 0x5555, 0x10)
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rv = dict.nes("NES_CPU_RD", 0x8000)
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local i = 0
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--TODO create some function to pass the read value
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--that's smart enough to figure out if the board is actually erasing or not
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while ( rv ~= 0xFF ) do
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rv = dict.nes("NES_CPU_RD", 0x8000)
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i = i + 1
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end
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print(i, "naks, done erasing prg.");
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print("erasing CHR-ROM");
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dict.nes("NES_PPU_WR", 0x1555, 0xAA)
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dict.nes("NES_PPU_WR", 0x0AAA, 0x55)
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dict.nes("NES_PPU_WR", 0x1555, 0x80)
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dict.nes("NES_PPU_WR", 0x1555, 0xAA)
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dict.nes("NES_PPU_WR", 0x0AAA, 0x55)
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dict.nes("NES_PPU_WR", 0x1555, 0x10)
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rv = dict.nes("NES_PPU_RD", 0x0000)
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while ( rv ~= 0xFF ) do
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rv = dict.nes("NES_PPU_RD", 0x0000)
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i = i + 1
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end
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print(i, "naks, done erasing chr.\n");
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end
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--program flashfile to the cart
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if program then
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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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--needs done to make board compatible with rom
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--flash cart
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flash.write_file( file, 32, "NROM", "PRGROM", true )
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flash.write_file( file, 8, "NROM", "CHRROM", true )
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--close file
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assert(file:close())
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end
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--verify flashfile is on the cart
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if verify then
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--for now let's just dump the file and verify manually
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file = assert(io.open(verifyfile, "wb"))
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--dump cart into file
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dump.dumptofile( file, 32, "NROM", "PRGROM", true )
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dump.dumptofile( file, 8, "NROM", "CHRROM", true )
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--close file
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assert(file:close())
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end
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dict.io("IO_RESET")
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end
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-- global variables so other modules can use them
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-- call functions desired to run when script is called/imported
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-- functions other modules are able to call
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nrom.process = process
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-- return the module's table
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return nrom
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