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beta128.cpp start documenting clone firmwares (nw)

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MetalliC 2020-06-07 23:02:14 +03:00
parent 763ee4e215
commit 54c7f3028e
1 changed files with 7 additions and 0 deletions
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src/devices/bus/spectrum/beta128.cpp
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@ -77,10 +77,17 @@ FLOPPY_FORMATS_END
ROM_START(beta128)
ROM_REGION(0x4000, "rom", 0)
ROM_DEFAULT_BIOS("trd503")
// original
ROM_SYSTEM_BIOS(0, "trd501", "TR-DOS v5.01")
ROMX_LOAD("trd501.rom", 0x0000, 0x4000, CRC(3e3cdd4c) SHA1(8303ba0cc79daa6c04cd1e6ce27e8b6886a3f0de), ROM_BIOS(0))
ROM_SYSTEM_BIOS(1, "trd503", "TR-DOS v5.03")
ROMX_LOAD("trd503.rom", 0x0000, 0x4000, CRC(10751aba) SHA1(21695e3f2a8f796386ce66eea8a246b0ac44810c), ROM_BIOS(1))
// clone/homebrew modifications based on original v5.03
ROM_SYSTEM_BIOS(2, "trd504t", "TR-DOS v5.04T (hack)")
// increased step rate (6ms), FORMAT command got interleave 1:1 option for faster read/write speed, this firmware was most common at post-soviet space in 90x.
ROMX_LOAD("trd504t.rom", 0x0000, 0x4000, CRC(e212d1e0) SHA1(745e9caf576e64a5386ad845256d28593d34cc40), ROM_BIOS(2))
// trd504.rom CRC ba310874 is bad dump of 5.03 with edited version text, no actual code changes.
ROM_END