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The Spectum Rom pack
Using custom operating system ROMS (Taken from the Spectrum User Manual v1.0.1
https://retrogames.biz/support/thespectrum/manuals/
Each of the original ZX Spectrum models had its own version of the Sinclair ZX Spectrum
operating system permanently stored within it on a Read Only Memory (ROM) chip. The
Spectrum is similar and has its own compatible version of the operating system which
is sufficient for most uses, but does lack a few specialist features found in particular
on later models of the ZX Spectrum.
Should you require the use of these additional features and you own the original ZX
Spectrum ROM chips, you can put the appropriate ROM image files on a USB stick
for The Spectrum to use instead of its own operating system.
The ROM image files must be stored in the folder /THESPECTRUM/roms/ on your
USB stick. The following table gives the filenames The Spectrum expects the operating
system ROM image files to use for each of the ZX Spectrum models:
Machine model / ROM filename / Description
16K / 48K
48.rom
A single 16K ROM file.
128K Universal
128-0.rom
128-1.rom
The 128K and universal models use two 16K
ROMs for a total of 32K of ROM.
+2A plus3-0.rom
plus3-1.rom
plus3-2.rom
plus3-3.rom
The +2A model uses four 16K ROMs for a total of 64K of ROM.
