; Copyright 1996 Acorn Computers Ltd
;
; Licensed under the Apache License, Version 2.0 (the "License");
; you may not use this file except in compliance with the License.
; You may obtain a copy of the License at
;
; http://www.apache.org/licenses/LICENSE-2.0
;
; Unless required by applicable law or agreed to in writing, software
; distributed under the License is distributed on an "AS IS" BASIS,
; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
; See the License for the specific language governing permissions and
; limitations under the License.
;
SUBT VDU variable numbers => &.Hdr.VduExt
OldOpt SETA {OPT}
OPT OptNoList+OptNoP1List
; ************************************************************
; *** C h a n g e L i s t (better late than never!) ***
; ************************************************************
; Date Name Description
; ---- ---- -----------
; 27-Oct-89 TMD Added VIDCClockSpeed
; 05-Aug-91 DDV Added Flag_FullPalette
; 15-Jul-93 TMD Added NumModeVars
; 21-Jul-98 NDT Added PixelRate
; Sets up external symbols of the form VduExt_<var name>
; for use with SWI OS_ReadVDUVariables
^ 0
VduExt_ModeFlags # 1
VduExt_ScrRCol # 1
VduExt_ScrBRow # 1
VduExt_NColour # 1
VduExt_XEigFactor # 1
VduExt_YEigFactor # 1
VduExt_LineLength # 1
VduExt_ScreenSize # 1
VduExt_YShftFactor # 1
VduExt_Log2BPP # 1
VduExt_Log2BPC # 1
VduExt_XWindLimit # 1
VduExt_YWindLimit # 1
NumModeVars # 0
VduExt_MinScreenBanks # 1 ; n.b. the kernel doesn't support this var yet (but other components do)
^ &80
VduExt_GWLCol # 1
VduExt_GWBRow # 1
VduExt_GWRCol # 1
VduExt_GWTRow # 1
VduExt_TWLCol # 1
VduExt_TWBRow # 1
VduExt_TWRCol # 1
VduExt_TWTRow # 1
VduExt_OrgX # 1
VduExt_OrgY # 1
VduExt_GCsX # 1
VduExt_GCsY # 1
VduExt_OlderCsX # 1
VduExt_OlderCsY # 1
VduExt_OldCsX # 1
VduExt_OldCsY # 1
VduExt_GCsIX # 1
VduExt_GCsIY # 1
VduExt_NewPtX # 1
VduExt_NewPtY # 1
VduExt_ScreenStart # 1
VduExt_DisplayStart # 1
VduExt_TotalScreenSize # 1
VduExt_GPLFMD # 1
VduExt_GPLBMD # 1
VduExt_GFCOL # 1
VduExt_GBCOL # 1
VduExt_TForeCol # 1
VduExt_TBackCol # 1
VduExt_GFTint # 1
VduExt_GBTint # 1
VduExt_TFTint # 1
VduExt_TBTint # 1
VduExt_MaxMode # 1
VduExt_GCharSizeX # 1
VduExt_GCharSizeY # 1
VduExt_GCharSpaceX # 1
VduExt_GCharSpaceY # 1
VduExt_HLineAddr # 1
VduExt_TCharSizeX # 1
VduExt_TCharSizeY # 1
VduExt_TCharSpaceX # 1
VduExt_TCharSpaceY # 1
VduExt_GcolOraEorAddr # 1
VduExt_VIDCClockSpeed # 1
VduExt_PixelRate # 1
VduExt_BorderL # 1
VduExt_BorderB # 1
VduExt_BorderR # 1
VduExt_BorderT # 1
^ &C0
VduExt_CurrentGraphicsVDriver # 1
^ &100
VduExt_WindowWidth # 1
VduExt_WindowHeight # 1
; Bits in ModeFlags
ModeFlag_NonGraphic * 1:SHL:0
ModeFlag_Teletext * 1:SHL:1
ModeFlag_GapMode * 1:SHL:2
ModeFlag_BBCGapMode * 1:SHL:3
ModeFlag_HiResMono * 1:SHL:4
ModeFlag_DoubleVertical * 1:SHL:5
ModeFlag_HardScrollDisabled * 1:SHL:6 ; set when outputting to a sprite, or driver doesn't support VIDC style scrolling
ModeFlag_FullPalette * 1:SHL:7 ; set when palette is not brain damaged
ModeFlag_64k * ModeFlag_FullPalette ; Used with log2bpp==4 to indicate 565 RGB/BGR mode
ModeFlag_InterlacedMode * 1:SHL:8 ; set when interlaced mode with hardware using two seperate framebuffers
ModeFlag_GreyscalePalette * 1:SHL:9 ; all entries greyscale, but no defined order
ModeFlag_ChromaSubsampleMode * ModeFlag_GreyscalePalette ; Used with log2bpp==7 to indicate chroma mode
; bits 10-11 reserved
ModeFlag_DataFormat_Mask * &F:SHL:12
ModeFlag_DataFormatFamily_Mask * 3:SHL:12 ; 0=RGB, 1=misc (CMYK), 2=YCbCr, 3=reserved
ModeFlag_DataFormatFamily_RGB * 0:SHL:12
ModeFlag_DataFormatFamily_Misc * 1:SHL:12
ModeFlag_DataFormatFamily_YCbCr * 2:SHL:12
ModeFlag_DataFormatSub_Mask * &C:SHL:12 ; RGB: b14 = RGB order (0=&ABGR, 1=&ARGB)
; b15 = alpha mode (0=transfer/supremacy, 1=alpha)
; misc: 2_00 = &KYMC
; YCbCr: b14 = range (0=full, 1=video)
; b15 = standard (0=ITU-R BT.601, 1=ITU-R BT.709)
ModeFlag_DataFormatSub_RGB * 4:SHL:12 ; 0=&xBGR, 1=&xRGB
ModeFlag_DataFormatSub_Alpha * 8:SHL:12 ; 0=transfer/supremacy, 1=alpha
ModeFlag_DataFormatSub_Video * 4:SHL:12 ; 0=full range, 1=video range
ModeFlag_DataFormatSub_709 * 8:SHL:12 ; 0=ITU-R BT.601, 1=ITU-R BT.709
ModeFlag_Transform_Mask * 7:SHL:16
ModeFlag_Transform_Rotate90 * 1:SHL:16
ModeFlag_Transform_Rotate180 * 2:SHL:16
ModeFlag_Transform_VFlip * 4:SHL:16
; Invalid GraphicsV driver number
GraphicsVInvalid * -2
; OS_ScreenMode reason codes
ScreenModeReason_SelectMode * 0
ScreenModeReason_ReturnMode * 1
ScreenModeReason_EnumerateModes * 2
ScreenModeReason_SelectMonitorType * 3
ScreenModeReason_ConfigureAcceleration * 4
ScreenModeReason_CleanCache * 5
ScreenModeReason_ForceCleanCache * 6
ScreenModeReason_CountScreenBanks * 7
ScreenModeReason_SelectDisplayBank * 8
ScreenModeReason_SelectVDUBank * 9
ScreenModeReason_CopyBank * 10
ScreenModeReason_SelectDevice * 11
ScreenModeReason_ROL_DeviceDetails * 12
ScreenModeReason_ModeStringToSpecifier * 13
ScreenModeReason_ModeSpecifierToString * 14
ScreenModeReason_SelectModeByString * 15
ScreenModeReason_Limit1 * 16 ; (not a valid reason code)
ScreenModeReason_RegisterDriver * 64
ScreenModeReason_StartDriver * 65
ScreenModeReason_StopDriver * 66
ScreenModeReason_DeregisterDriver * 67
ScreenModeReason_EnumerateDrivers * 68
ScreenModeReason_Limit2 * 69 ; (not a valid reason code)
ScreenModeReason_ROL_ReadMaximumDriver * 253
ScreenModeReason_ROL_DeregisterDriver * 254
ScreenModeReason_ROL_RegisterDriver * 255
; Mode selector format
^ 0
ModeSelector_Flags # 4 ; flags word
ModeSelector_XRes # 4 ; x-resolution in pixels
ModeSelector_YRes # 4 ; y-resolution in pixels
ModeSelector_PixelDepth # 4 ; pixel depth (=Log2BPP)
ModeSelector_FrameRate # 4 ; nominal frame rate (in Hz)
ModeSelector_ModeVars # 0 ; start of pairs of (mode var index, value)
ModeSelectorFlags_FormatMask * &FF
ModeSelectorFlags_ValidFormat * 1
ModeSelector_MaxSize * ModeSelector_ModeVars+(NumModeVars * 8)+4
; maximum size of a mode selector, with each mode variable overridden
; plus terminator on end
; Service_DisplayChanged reason codes (R0)
DisplayChanged_Changing * 0
DisplayChanged_Changed * 1
DisplayChanged_PreChanging * 128
; Service_DisplayChanged sub-reason codes (R3)
DisplayChangedSub_ModeChanged * 0
DisplayChangedSub_ModeNotChanged * 128
; Service_DisplayStatus reason codes (R0)
DisplayStatus_Deregistered * 0
DisplayStatus_Registered * 1
DisplayStatus_Changing * 128
DisplayStatus_Changed * 129
OPT OldOpt
END