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DONE/GETPALETTE/GETDEFPALETTE must no longer return an error code.

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Used TGI_API_VERSION.


git-svn-id: svn://svn.cc65.org/cc65/trunk@2571 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cuz 2003-10-23 09:50:57 +00:00
parent d5dc5a7552
commit d168bbdb93
1 changed files with 12 additions and 14 deletions
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26
libsrc/geos/devel/geos-tgi.s
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@ -42,7 +42,7 @@ VDC_DATA = 31
; capabilities of the driver
.byte $74, $67, $69 ; "tgi"
.byte $00 ; TGI version number
.byte TGI_API_VERSION ; TGI API version number
xres: .word 320 ; X resolution
yres: .word 200 ; Y resolution
.byte 2 ; Number of drawing colors
@ -52,10 +52,7 @@ pages: .byte 1 ; Number of screens available
.res 4, $00 ; Reserved for future extensions
; Next comes the jump table. Currently all entries must be valid and may point
; to an RTS for test versions (function not implemented). A future version may
; allow for emulation: In this case the vector will be zero. Emulation means
; that the graphics kernel will emulate the function by using lower level
; primitives - for example ploting a line by using calls to SETPIXEL.
; to an RTS for test versions (function not implemented).
.word INSTALL
.word UNINSTALL
@ -298,12 +295,10 @@ INIT:
; The graphics kernel will never call DONE when no graphics mode is active,
; so there is no need to protect against that.
;
; Must set an error code: YES
; Must set an error code: NO
;
DONE:
jsr GETERROR ; clear error (if any)
lda #0
jsr SETVIEWPAGE ; switch into viewpage 0
@ -477,10 +472,11 @@ SETPALETTE:
jmp VDCWriteReg
; ------------------------------------------------------------------------
; GETPALETTE: Return the current palette in A/X. Must return NULL and set an
; error if palettes are not supported.
; GETPALETTE: Return the current palette in A/X. Even drivers that cannot
; set the palette should return the default palette here, so there's no
; way for this function to fail.
;
; Must set an error code: YES
; Must set an error code: NO
;
GETPALETTE:
@ -489,10 +485,12 @@ GETPALETTE:
rts
; ------------------------------------------------------------------------
; GETDEFPALETTE: Return the default palette for the driver in A/X. Must
; return NULL and set an error of palettes are not supported.
; GETDEFPALETTE: Return the default palette for the driver in A/X. All
; drivers should return something reasonable here, even drivers that don't
; support palettes, otherwise the caller has no way to determine the colors
; of the (not changeable) palette.
;
; Must set an error code: YES
; Must set an error code: NO (all drivers must have a default palette)
;
GETDEFPALETTE: