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Don't pointlessly doubly-map external framestores
Jeffrey Lee authored 
Detail:
  s/vdu/vdudriver - When mapping external framestores, only double-map them if the driver supports hardware scrolling. Avoids wasting IO address space, and reduces IO space fragmentation if the framestore address changes
Admin:
  Tested on Raspberry Pi 3


Version 6.19. Tagged as 'Kernel-6_19'
e604b89c
Name Last commit Last update
Dev Delete lots of old switches
Doc Kernel merged
Docs Initial SMP changes
Resources/UK Add support for shareable pages and additional access privileges
TestSrc Delete pre-HAL and 26bit code
h Header defs for Pi Compute module and IIC
hdr Service_ModeExtension tweak + docs update
o Clean reimport of hdr.RISCOS (real commit date 2008-03-28 by bavison), without any of the 3rd party allocations.
rm Clean reimport of hdr.RISCOS (real commit date 2008-03-28 by bavison), without any of the 3rd party allocations.
s Don't pointlessly doubly-map external framestores
.gitattributes Added 'UnConv' error (see also HdrSrc).
BlackLog Initial revision
Changes Import from cleaned 360 CD
HelpStrs Adoption of *CONFIGURE/STATUS CACHE commands
LICENSE Clean reimport of hdr.RISCOS (real commit date 2008-03-28 by bavison), without any of the 3rd party allocations.
Makefile Merge in latest changes from main branch
MkClean,fd7 Mostly device stuff.
MkExport,fd7 Import from cleaned 360 CD
MkInstall,fd7 Added a disc install phase as an analogue of the export phase
MkRom,fd7 Makefile recreated from fragments
Version Nightly beta builds leapfrog RISC OS 5.26
VersionASM Don't pointlessly doubly-map external framestores
VersionNum Don't pointlessly doubly-map external framestores