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ZX-State format: Difference between revisions
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→ZXSTDIVIDE: Document ZXSTDIVIDERAMPAGE block.
(→ZXSTDIVIDE: Finish documenting block.) |
(→ZXSTDIVIDE: Document ZXSTDIVIDERAMPAGE block.) |
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'''chData'''<br /> The compressed or uncompressed contents of the DivIDE's EPROM. When uncompressed, this member is exactly 16KB (16,384) bytes in size. When loading [http://www.zlib.org/ Zlib] compressed pages, the compressed size can be obtained by: | '''chData'''<br /> The compressed or uncompressed contents of the DivIDE's EPROM. When uncompressed, this member is exactly 16KB (16,384) bytes in size. When loading [http://www.zlib.org/ Zlib] compressed pages, the compressed size can be obtained by: | ||
compressedSize = blk.dwSize - ( sizeof( ZXSTDIVIDEBLOCK ) - sizeof( ZXSTBLOCK ) - 1 ); | compressedSize = blk.dwSize - ( sizeof( ZXSTDIVIDEBLOCK ) - sizeof( ZXSTBLOCK ) - 1 ); | ||
=== ZXSTDIVIDERAMPAGE === | |||
This block is used to save and restore the contents of the DivIDE's built-in RAM. | |||
A zx-state file will contain a number of these blocks, normally 4 for the 32KB DivIDE. A [[#ZXSTDIVIDE|ZXSTDIVIDE]] block will proceed the first of these blocks. | |||
// Ram pages are compressed using Zlib | |||
#define ZXSTDRF_COMPRESSED 1 | |||
// DivIDE RAM page | |||
typedef struct _tagZXSTDIVIDERAMPAGEBLOCK | |||
{ | |||
ZXSTBLOCK blk; | |||
WORD wFlags; | |||
BYTE chPageNo; | |||
BYTE chData[1]; | |||
} ZXSTDIVIDERAMPAGEBLOCK, *LPZXSTDIVIDERAMPAGEBLOCK; | |||
==== Members ==== | |||
'''blk'''<br /> The block header. The block id is ZXSTBID_DIVIDERAMPAGE ('D', 'I', 'R', 'P').<br /> | |||
'''wFlags'''<br /> Various flags. This can be any combination of: | |||
{|cellspacing="1" cellpadding="1" border="1" width="100%" | |||
|'''Flag''' | |||
|'''Meaning''' | |||
|- | |||
|ZXSTDRF_COMPRESSED | |||
|If set, the RAM page data (beginning from '''chData''') will be compressed using the [http://www.zlib.org/ Zlib] compression library. | |||
|} | |||
'''chPageNo'''<br /> Page number of this 8KB RAM page. For the 32KB version of the DivIDE interface, this is 0 - 3.<br /> | |||
'''chData'''<br /> The compressed or uncompressed contents of the RAM page. When uncompressed, this member is exactly 8KB (8,192) bytes in size. When loading [http://www.zlib.org/ Zlib] compressed pages, the compressed size can be obtained by: | |||
compressedSize = blk.dwSize - ( sizeof( ZXSTDIVIDERAMPAGEBLOCK ) - sizeof( ZXSTBLOCK ) - 1 ); | |||
=== ZXSTLEC === | === ZXSTLEC === | ||