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ZX-State format: Difference between revisions
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Move ULAplus SZX block definition here (as I'm going to add some more in a bit).
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(Move ULAplus SZX block definition here (as I'm going to add some more in a bit).) |
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Early versions of libspectrum (prior to 1.0.0) contained a bug which caused the A and A' registers to be swapped with F and F', respectively, when loading or saving in the SZX format. Current versions of libspectrum detect "libspectrum: 0.5.0" and earlier versions strings and correct for this. | Early versions of libspectrum (prior to 1.0.0) contained a bug which caused the A and A' registers to be swapped with F and F', respectively, when loading or saving in the SZX format. Current versions of libspectrum detect "libspectrum: 0.5.0" and earlier versions strings and correct for this. | ||
== Format extensions == | |||
With the official specification being somewhat stalled, some emulators have added ''unofficial'' extensions to the format. These include: | |||
=== ZXSTPALETTE === | |||
The state of the ULA registers found in the [[ULAplus|64 colour replacement ULA]]. This block may be present for any machine. | |||
// Palette Block flags | |||
#define ZXSTPALETTE_DISABLED 0 | |||
#define ZXSTPALETTE_ENABLED 1 | |||
// Palette Block. Contains the palette register values | |||
typedef struct _tagZXSTPALETTEBLOCK | |||
{ | |||
ZXSTBLOCK blk; | |||
BYTE chFlags; | |||
BYTE chCurrentRegister; | |||
BYTE chPaletteRegs[64]; | |||
} ZXSTPALETTEBLOCK, *LPZXSTPALETTEBLOCK; | |||
==== Members ==== | |||
'''blk'''<br /> The block header. The block id is ZXSTBID_PALETTE ('P', 'L', 'T', 'T').<br /> '''chFlags'''<br /> A flags that indicates if the palette is enabled or if the normal display mode is in use. This can be one of: | |||
{|cellspacing="1" cellpadding="1" border="1" width="100%" | |||
|'''Flag''' | |||
|'''Meaning''' | |||
|- | |||
|ZXSTPALETTE_DISABLED | |||
|Normal palette mode with BRIGHT and FLASH | |||
|- | |||
|ZXSTPALETTE_ENABLED | |||
|64 colour palette mode | |||
|} | |||
<br /> '''chCurrentRegister'''<br /> The currently selected palette register (0-63).<br /> '''chPaletteRegs'''<br /> The current values of the palette registers. | |||
[[Category:Emulator Snapshot File Formats]] | [[Category:Emulator Snapshot File Formats]] | ||