mirror of
https://github.com/cc65/cc65.git
synced 2025-01-14 00:32:08 +00:00
NES character mode TGI driver. By Stefan Haubenthal.
git-svn-id: svn://svn.cc65.org/cc65/trunk@5067 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
parent
3f2f3baa27
commit
eae262b7c3
@ -309,6 +309,7 @@ neslib:
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$(AR) a nes.lib $$i/*.o || exit 1; \
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done
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cp nes/*.joy .
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cp nes/*.tgi .
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if [ -d nes/extra ]; then \
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for i in nes/extra/*.o; do \
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cp $$i nes-`basename $$i` || exit 1; \
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@ -41,6 +41,18 @@ CFLAGS = -Osir -g -T -t $(SYS) --forget-inc-paths -I . -I ../../include
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%.tgi: %.o ../runtime/zeropage.o
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@$(LD) -o $@ -t module $^
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nes-64-56-2.tgi: nes-64-56-2.o \
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../runtime/popa.o \
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../runtime/zeropage.o \
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clrscr.o \
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cputc.o \
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get_tv.o \
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gotoxy.o \
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ppu.o \
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ppubuf.o \
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setcursor.o
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@$(LD) -o $@ -t module $^
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#--------------------------------------------------------------------------
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# Object files
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@ -80,7 +92,7 @@ MOUS =
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SERS =
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TGIS =
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TGIS = nes-64-56-2.tgi
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#--------------------------------------------------------------------------
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# Targets
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@ -89,6 +101,9 @@ TGIS =
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all: $(OBJS) $(EMDS) $(JOYS) $(MOUS) $(SERS) $(TGIS)
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../runtime/popa.o:
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$(MAKE) -C $(dir $@) $(notdir $@)
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../runtime/zeropage.o:
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$(MAKE) -C $(dir $@) $(notdir $@)
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@ -99,3 +114,4 @@ zap: clean
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@$(RM) $(EMDS) $(JOYS) $(MOUS) $(SERS) $(TGIS)
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723
libsrc/nes/nes-64-56-2.s
Normal file
723
libsrc/nes/nes-64-56-2.s
Normal file
@ -0,0 +1,723 @@
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;
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; Graphics driver for the lores 64x56x2 mode on the NES
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;
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; Stefan Haubenthal, 2009-03-10
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; Based on Maciej Witkowiak's line routine.
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;
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.include "zeropage.inc"
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.include "tgi-kernel.inc"
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.include "tgi-error.inc"
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.include "nes.inc"
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.include "get_tv.inc"
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.import _clrscr, setcursor, putchar
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.import paldata
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.macpack generic
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; ------------------------------------------------------------------------
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; Header. Includes jump table and constants.
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.segment "JUMPTABLE"
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; First part of the header is a structure that has a magic and defines the
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; capabilities of the driver
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.byte $74, $67, $69 ; "tgi"
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.byte TGI_API_VERSION ; TGI API version number
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xres: .word charsperline*2 ; Max X resolution
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yres: .word 56 ; Max Y resolution
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.byte 2 ; Number of drawing colors
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.byte 1 ; Number of screens available
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.byte 2 ; System font X size
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.byte 2 ; System font Y size
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.word $100 ; Aspect ratio
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; Next comes the jump table. Currently all entries must be valid and may point
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; to an RTS for test versions (function not implemented).
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.addr INSTALL
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.addr UNINSTALL
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.addr INIT
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.addr DONE
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.addr GETERROR
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.addr CONTROL
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.addr CLEAR
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.addr SETVIEWPAGE
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.addr SETDRAWPAGE
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.addr SETCOLOR
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.addr SETPALETTE
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.addr GETPALETTE
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.addr GETDEFPALETTE
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.addr SETPIXEL
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.addr GETPIXEL
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.addr LINE
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.addr BAR
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.addr TEXTSTYLE
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.addr OUTTEXT
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.addr 0 ; IRQ entry is unused
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; ------------------------------------------------------------------------
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; Data.
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; Variables mapped to the zero page segment variables. Some of these are
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; used for passing parameters to the driver.
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X1 = ptr1
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Y1 = ptr2
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X2 = ptr3
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Y2 = ptr4
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RADIUS = tmp1
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ADDR = tmp1
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TEMP = tmp3
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TEMP2 = tmp4
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TEMP3 = sreg
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TEMP4 = sreg+1
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; Line routine stuff (must be on zpage)
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PB = ptr3 ; (2) LINE
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UB = ptr4 ; (2) LINE
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ERR = regsave ; (2) LINE
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NX = regsave+2 ; (2) LINE
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; Absolute variables used in the code
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.bss
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MEM: .res charsperline*2*56/4
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MEMEND:
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ERROR: .res 1 ; Error code
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COLOR: .res 1 ; Current color
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PALETTE: .res 2 ; The current palette
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; Line routine stuff
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OGora:
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COUNT: .res 2
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OUkos:
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NY: .res 2
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Y3:
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DX: .res 1
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DY: .res 1
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AY: .res 1
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; Constants and tables
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.rodata
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DEFPALETTE: .byte $0, $1
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OFFSET: .byte 8, 4, 2, 1
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; 00 00 00 00 01 01 01 01
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; 00 01 10 11 00 01 10 11
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CODE: .byte 32, 29, 26, 25, 28, 24+128, 31+128, 30+128
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; 10 10 10 10 11 11 11 11
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; 00 01 10 11 00 01 10 11
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.byte 30, 31, 24, 28+128, 25+128, 26+128, 29+128, 32+128
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.code
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; ------------------------------------------------------------------------
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; INSTALL routine. Is called after the driver is loaded into memory. May
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; initialize anything that has to be done just once. Is probably empty
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; most of the time.
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;
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; Must set an error code: NO
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;
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INSTALL:
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jsr _get_tv
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cmp #TV::NTSC
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beq ntsc
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; TODO ROM!
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inc yres
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inc yres
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ntsc:; rts
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; ------------------------------------------------------------------------
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; UNINSTALL routine. Is called before the driver is removed from memory. May
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; clean up anything done by INSTALL but is probably empty most of the time.
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;
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; Must set an error code: NO
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;
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UNINSTALL:
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rts
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; ------------------------------------------------------------------------
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; INIT: Changes an already installed device from text mode to graphics
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; mode.
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; Note that INIT/DONE may be called multiple times while the driver
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; is loaded, while INSTALL is only called once, so any code that is needed
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; to initializes variables and so on must go here. Setting palette and
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; clearing the screen is not needed because this is called by the graphics
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; kernel later.
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; The graphics kernel will never call INIT when a graphics mode is already
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; active, so there is no need to protect against that.
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;
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; Must set an error code: YES
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;
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INIT:
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; Done, reset the error code
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lda #TGI_ERR_OK
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sta ERROR
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; rts
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; ------------------------------------------------------------------------
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; DONE: Will be called to switch the graphics device back into text mode.
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; The graphics kernel will never call DONE when no graphics mode is active,
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; so there is no need to protect against that.
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;
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; Must set an error code: NO
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;
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DONE:
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rts
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; ------------------------------------------------------------------------
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; GETERROR: Return the error code in A and clear it.
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GETERROR:
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lda ERROR
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ldx #TGI_ERR_OK
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stx ERROR
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rts
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; ------------------------------------------------------------------------
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; CONTROL: Platform/driver specific entry point.
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;
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; Must set an error code: YES
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;
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CONTROL:
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lda #TGI_ERR_INV_FUNC
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sta ERROR
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rts
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; ------------------------------------------------------------------------
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; CLEAR: Clears the screen.
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;
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; Must set an error code: NO
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;
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CLEAR:
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ldx #<MEM
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stx TEMP
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ldx #>MEM
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stx TEMP+1
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lda #0
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tay
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@L1: sta (TEMP),y
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iny
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bne @L1
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inc TEMP+1
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inx
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cpx #>MEMEND
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bne @L1
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jmp _clrscr
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; ------------------------------------------------------------------------
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; SETCOLOR: Set the drawing color (in A). The new color is already checked
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; to be in a valid range (0..maxcolor-1).
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;
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; Must set an error code: NO (will only be called if color ok)
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;
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SETCOLOR:
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sta COLOR
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; rts
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; ------------------------------------------------------------------------
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; SETVIEWPAGE: Set the visible page. Called with the new page in A (0..n).
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; The page number is already checked to be valid by the graphics kernel.
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;
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; Must set an error code: NO (will only be called if page ok)
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;
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SETVIEWPAGE:
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; ------------------------------------------------------------------------
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; SETDRAWPAGE: Set the drawable page. Called with the new page in A (0..n).
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; The page number is already checked to be valid by the graphics kernel.
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;
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; Must set an error code: NO (will only be called if page ok)
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;
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SETDRAWPAGE:
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rts
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; ------------------------------------------------------------------------
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; SETPALETTE: Set the palette (not available with all drivers/hardware).
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; A pointer to the palette is passed in ptr1. Must set an error if palettes
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; are not supported
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;
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; Must set an error code: YES
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;
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SETPALETTE:
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; Wait for v-blank
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@wait: lda PPU_STATUS
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bpl @wait
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lda #$3F
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sta PPU_VRAM_ADDR2
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lda #$00
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sta PPU_VRAM_ADDR2
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ldy #0
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lda (ptr1),y
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sta PALETTE
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tax
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lda paldata,x
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; sta PPU_VRAM_IO
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iny
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lda (ptr1),y
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sta PALETTE+1
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tax
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lda paldata,x
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sta PPU_VRAM_IO
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lda #TGI_ERR_OK
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sta ERROR
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rts
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; ------------------------------------------------------------------------
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; GETPALETTE: Return the current palette in A/X. Even drivers that cannot
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; set the palette should return the default palette here, so there's no
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; way for this function to fail.
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;
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; Must set an error code: NO
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;
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GETPALETTE:
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lda #<PALETTE
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ldx #>PALETTE
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rts
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; ------------------------------------------------------------------------
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; GETDEFPALETTE: Return the default palette for the driver in A/X. All
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; drivers should return something reasonable here, even drivers that don't
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; support palettes, otherwise the caller has no way to determine the colors
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; of the (not changeable) palette.
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;
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; Must set an error code: NO (all drivers must have a default palette)
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;
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GETDEFPALETTE:
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lda #<DEFPALETTE
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ldx #>DEFPALETTE
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rts
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; ------------------------------------------------------------------------
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; SETPIXEL: Draw one pixel at X1/Y1 = ptr1/ptr2 with the current drawing
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; color. The coordinates passed to this function are never outside the
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; visible screen area, so there is no need for clipping inside this function.
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;
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; Must set an error code: NO
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;
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SETPIXEL:
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ldx Y1 ; y+2<yres
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inx
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inx
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cpx yres
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bcc @L2
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ldx X1 ; x+2<xres
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inx
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inx
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cpx xres
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bcc @L2
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rts
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@L2: lda X1
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lsr
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tay
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lda Y1
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lsr
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tax
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clc
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jsr setcursor
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jsr CALC
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ldx COLOR
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bne @set2
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eor #%00001111
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@set2: sta TEMP3
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lda (TEMP),y
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ldx COLOR
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bne @set
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and TEMP3
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.byte $2c
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@set: ora TEMP3
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sta (TEMP),y
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tax
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lda CODE,x
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@normal:jmp putchar
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; ------------------------------------------------------------------------
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; GETPIXEL: Read the color value of a pixel and return it in A/X. The
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; coordinates passed to this function are never outside the visible screen
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; area, so there is no need for clipping inside this function.
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GETPIXEL:
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jsr CALC
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sta TEMP3
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lda (TEMP),y
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and TEMP3
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beq @L1
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lda #1
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@L1: ldx #0
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rts
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; ------------------------------------------------------------------------
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; LINE: Draw a line from X1/Y1 to X2/Y2, where X1/Y1 = ptr1/ptr2 and
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; X2/Y2 = ptr3/ptr4 using the current drawing color.
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;
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; Must set an error code: NO
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;
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LINE:
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; nx = abs(x2 - x1)
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lda X2
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sub X1
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sta NX
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lda X2+1
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sbc X1+1
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tay
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lda NX
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jsr abs
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sta NX
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sty NX+1
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; ny = abs(y2 - y1)
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lda Y2
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sub Y1
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sta NY
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lda Y2+1
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sbc Y1+1
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tay
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lda NY
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jsr abs
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sta NY
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sty NY+1
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; if (x2>=x1)
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ldx #X2
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lda X1
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ldy #0
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jsr icmp
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bcc @L0243
|
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beq @L0243
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; dx = 1;
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lda #1
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bne @L0244
|
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; else
|
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; dx = -1;
|
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@L0243: lda #$ff
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@L0244: sta DX
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; if (y2>=y1)
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ldx #Y2
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lda Y1
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ldy #0
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||||
jsr icmp
|
||||
bcc @L024A
|
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beq @L024A
|
||||
; dy = 1;
|
||||
lda #1
|
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bne @L024B
|
||||
; else
|
||||
; dy = -1;
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||||
@L024A: lda #$ff
|
||||
@L024B: sta DY
|
||||
; err = ay = 0;
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||||
lda #0
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||||
sta ERR
|
||||
sta ERR+1
|
||||
sta AY
|
||||
|
||||
; if (nx<ny) {
|
||||
ldx #NX
|
||||
lda NY
|
||||
ldy #0
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jsr icmp
|
||||
bcs @L0255
|
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; nx <-> ny
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lda NX
|
||||
ldx NY
|
||||
sta NY
|
||||
stx NX
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||||
lda NX+1
|
||||
ldx NY+1
|
||||
sta NY+1
|
||||
stx NX+1
|
||||
; ay = dx
|
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lda DX
|
||||
sta AY
|
||||
; dx = dy = 0;
|
||||
lda #0
|
||||
sta DX
|
||||
sta DY
|
||||
; ny = - ny;
|
||||
@L0255: lda NY
|
||||
ldy #0
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jsr neg
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||||
sta NY
|
||||
sty NY+1
|
||||
; for (count=nx;count>0;--count) {
|
||||
lda NX
|
||||
ldx #0
|
||||
sta COUNT
|
||||
stx COUNT+1
|
||||
@L0166: lda COUNT ; count>0
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ora COUNT+1
|
||||
bne @L0167
|
||||
rts
|
||||
; setpixel(X1,Y1)
|
||||
@L0167: jsr SETPIXEL
|
||||
; pb = err + ny
|
||||
lda ERR
|
||||
add NY
|
||||
sta PB
|
||||
lda ERR+1
|
||||
adc NY+1
|
||||
sta PB+1
|
||||
tax
|
||||
; ub = pb + nx
|
||||
lda PB
|
||||
add NX
|
||||
sta UB
|
||||
txa
|
||||
adc NX+1
|
||||
sta UB+1
|
||||
; x1 = x1 + dx
|
||||
ldx #0
|
||||
lda DX
|
||||
bpl @L027B
|
||||
dex
|
||||
@L027B: add X1
|
||||
sta X1
|
||||
txa
|
||||
adc X1+1
|
||||
sta X1+1
|
||||
; y1 = y1 + ay
|
||||
ldx #0
|
||||
lda AY
|
||||
bpl @L027E
|
||||
dex
|
||||
@L027E: add Y1
|
||||
sta Y1
|
||||
txa
|
||||
adc Y1+1
|
||||
sta Y1+1
|
||||
; if (abs(pb)<abs(ub)) {
|
||||
lda PB
|
||||
ldy PB+1
|
||||
jsr abs
|
||||
sta TEMP3
|
||||
sty TEMP4
|
||||
lda UB
|
||||
ldy UB+1
|
||||
jsr abs
|
||||
ldx #TEMP3
|
||||
jsr icmp
|
||||
bpl @L027F
|
||||
; err = pb
|
||||
lda PB
|
||||
ldx PB+1
|
||||
jmp @L0312
|
||||
; } else { x1 = x1 + ay
|
||||
@L027F:
|
||||
ldx #0
|
||||
lda AY
|
||||
bpl @L0288
|
||||
dex
|
||||
@L0288: add X1
|
||||
sta X1
|
||||
txa
|
||||
adc X1+1
|
||||
sta X1+1
|
||||
; y1 = y1 + dy
|
||||
ldx #0
|
||||
lda DY
|
||||
bpl @L028B
|
||||
dex
|
||||
@L028B: add Y1
|
||||
sta Y1
|
||||
txa
|
||||
adc Y1+1
|
||||
sta Y1+1
|
||||
; err = ub }
|
||||
lda UB
|
||||
ldx UB+1
|
||||
@L0312:
|
||||
sta ERR
|
||||
stx ERR+1
|
||||
; } (--count)
|
||||
sec
|
||||
lda COUNT
|
||||
sbc #1
|
||||
sta COUNT
|
||||
bcc @L0260
|
||||
jmp @L0166
|
||||
@L0260: dec COUNT+1
|
||||
jmp @L0166
|
||||
|
||||
; ------------------------------------------------------------------------
|
||||
; BAR: Draw a filled rectangle with the corners X1/Y1, X2/Y2, where
|
||||
; X1/Y1 = ptr1/ptr2 and X2/Y2 = ptr3/ptr4 using the current drawing color.
|
||||
; Contrary to most other functions, the graphics kernel will sort and clip
|
||||
; the coordinates before calling the driver, so on entry the following
|
||||
; conditions are valid:
|
||||
; X1 <= X2
|
||||
; Y1 <= Y2
|
||||
; (X1 >= 0) && (X1 < XRES)
|
||||
; (X2 >= 0) && (X2 < XRES)
|
||||
; (Y1 >= 0) && (Y1 < YRES)
|
||||
; (Y2 >= 0) && (Y2 < YRES)
|
||||
;
|
||||
; Must set an error code: NO
|
||||
;
|
||||
|
||||
BAR:
|
||||
inc Y2
|
||||
@L1: lda X1
|
||||
pha
|
||||
@L2: jsr SETPIXEL
|
||||
inc X1
|
||||
lda X2
|
||||
cmp X1
|
||||
bne @L2
|
||||
pla
|
||||
sta X1
|
||||
inc Y1
|
||||
lda Y2
|
||||
cmp Y1
|
||||
bne @L1
|
||||
rts
|
||||
|
||||
; ------------------------------------------------------------------------
|
||||
; TEXTSTYLE: Set the style used when calling OUTTEXT. Text scaling in X and Y
|
||||
; direction is passend in X/Y, the text direction is passed in A.
|
||||
;
|
||||
; Must set an error code: NO
|
||||
;
|
||||
|
||||
TEXTSTYLE:
|
||||
rts
|
||||
|
||||
; ------------------------------------------------------------------------
|
||||
; OUTTEXT: Output text at X/Y = ptr1/ptr2 using the current color and the
|
||||
; current text style. The text to output is given as a zero terminated
|
||||
; string with address in ptr3.
|
||||
;
|
||||
; Must set an error code: NO
|
||||
;
|
||||
|
||||
OUTTEXT:
|
||||
lda ptr1
|
||||
lsr
|
||||
tay
|
||||
lda ptr2
|
||||
lsr
|
||||
tax
|
||||
clc
|
||||
jsr setcursor
|
||||
ldy #0
|
||||
@L1: lda (ptr3),y
|
||||
jsr putchar
|
||||
iny
|
||||
cmp #$0
|
||||
bne @L1
|
||||
rts
|
||||
|
||||
;-------------
|
||||
; copies of some runtime routines
|
||||
|
||||
abs:
|
||||
; a/y := abs(a/y)
|
||||
cpy #0
|
||||
bpl absend
|
||||
; negay
|
||||
neg: eor #$ff
|
||||
add #1
|
||||
pha
|
||||
tya
|
||||
eor #$ff
|
||||
adc #0
|
||||
tay
|
||||
pla
|
||||
absend: rts
|
||||
|
||||
icmp:
|
||||
; compare a/y to zp,x
|
||||
sta TEMP ; TEMP/TEMP2 - arg2
|
||||
sty TEMP2
|
||||
lda $0,x
|
||||
pha
|
||||
lda $1,x
|
||||
tay
|
||||
pla
|
||||
tax
|
||||
tya ; x/a - arg1 (a=high)
|
||||
|
||||
sub TEMP2
|
||||
bne @L4
|
||||
cpx TEMP
|
||||
beq @L3
|
||||
adc #$ff
|
||||
ora #$01
|
||||
@L3: rts
|
||||
@L4: bvc @L3
|
||||
eor #$ff
|
||||
ora #$01
|
||||
rts
|
||||
|
||||
|
||||
; ------------------------------------------------------------------------
|
||||
; Calculate all variables to plot the pixel at X1/Y1. If the point is out
|
||||
; of range, a carry is returned and INRANGE is set to a value !0 zero. If
|
||||
; the coordinates are valid, INRANGE is zero and the carry clear.
|
||||
|
||||
CALC: lda xres
|
||||
sta TEMP
|
||||
lda #0
|
||||
sta TEMP+1
|
||||
ldy Y1
|
||||
@L1: lda TEMP
|
||||
add xres
|
||||
lsr
|
||||
sta TEMP
|
||||
lda TEMP+1
|
||||
adc #0
|
||||
lsr
|
||||
sta TEMP+1
|
||||
dey
|
||||
bne @L1
|
||||
lda TEMP
|
||||
add X1
|
||||
lsr
|
||||
sta TEMP
|
||||
lda TEMP+1
|
||||
adc #0
|
||||
lsr
|
||||
sta TEMP+1
|
||||
lda TEMP
|
||||
add #<MEM
|
||||
sta TEMP
|
||||
lda TEMP+1
|
||||
adc #>MEM
|
||||
sta TEMP+1
|
||||
|
||||
lda X1
|
||||
and #%00000001
|
||||
sta TEMP3
|
||||
lda Y1
|
||||
asl
|
||||
and #%00000010
|
||||
ora TEMP3
|
||||
tax
|
||||
lda OFFSET,x
|
||||
rts
|
215
libsrc/nes/ppu.s
215
libsrc/nes/ppu.s
@ -4,129 +4,129 @@
|
||||
;
|
||||
|
||||
.export ppuinit
|
||||
.export paletteinit
|
||||
.export paletteinit, paldata
|
||||
|
||||
.include "nes.inc"
|
||||
.include "nes.inc"
|
||||
|
||||
;+---------+----------------------------------------------------------+
|
||||
;| $2000 | PPU Control Register #1 (W) |
|
||||
;| | |
|
||||
;| | D7: Execute NMI on VBlank |
|
||||
;| | 0 = Disabled |
|
||||
;| | 1 = Enabled |
|
||||
;| | D6: PPU Master/Slave Selection --+ |
|
||||
;| | 0 = Master +-- UNUSED |
|
||||
;| | 1 = Slave --+ |
|
||||
;| | D5: Sprite Size |
|
||||
;| | 0 = 8x8 |
|
||||
;| | 1 = 8x16 |
|
||||
;| | D4: Background Pattern Table Address |
|
||||
;| | 0 = $0000 (VRAM) |
|
||||
;| | 1 = $1000 (VRAM) |
|
||||
;| | D3: Sprite Pattern Table Address |
|
||||
;| | 0 = $0000 (VRAM) |
|
||||
;| | 1 = $1000 (VRAM) |
|
||||
;| | D2: PPU Address Increment |
|
||||
;| | 0 = Increment by 1 |
|
||||
;| | 1 = Increment by 32 |
|
||||
;| | D1-D0: Name Table Address |
|
||||
;| | 00 = $2000 (VRAM) |
|
||||
;| | 01 = $2400 (VRAM) |
|
||||
;| | 10 = $2800 (VRAM) |
|
||||
;| | 11 = $2C00 (VRAM) |
|
||||
;| $2000 | PPU Control Register #1 (W) |
|
||||
;| | |
|
||||
;| | D7: Execute NMI on VBlank |
|
||||
;| | 0 = Disabled |
|
||||
;| | 1 = Enabled |
|
||||
;| | D6: PPU Master/Slave Selection --+ |
|
||||
;| | 0 = Master +-- UNUSED |
|
||||
;| | 1 = Slave --+ |
|
||||
;| | D5: Sprite Size |
|
||||
;| | 0 = 8x8 |
|
||||
;| | 1 = 8x16 |
|
||||
;| | D4: Background Pattern Table Address |
|
||||
;| | 0 = $0000 (VRAM) |
|
||||
;| | 1 = $1000 (VRAM) |
|
||||
;| | D3: Sprite Pattern Table Address |
|
||||
;| | 0 = $0000 (VRAM) |
|
||||
;| | 1 = $1000 (VRAM) |
|
||||
;| | D2: PPU Address Increment |
|
||||
;| | 0 = Increment by 1 |
|
||||
;| | 1 = Increment by 32 |
|
||||
;| | D1-D0: Name Table Address |
|
||||
;| | 00 = $2000 (VRAM) |
|
||||
;| | 01 = $2400 (VRAM) |
|
||||
;| | 10 = $2800 (VRAM) |
|
||||
;| | 11 = $2C00 (VRAM) |
|
||||
;+---------+----------------------------------------------------------+
|
||||
;+---------+----------------------------------------------------------+
|
||||
;| $2001 | PPU Control Register #2 (W) |
|
||||
;| | |
|
||||
;| | D7-D5: Full Background Colour (when D0 == 1) |
|
||||
;| | 000 = None +------------+ |
|
||||
;| | 001 = Green | NOTE: Do not use more |
|
||||
;| | 010 = Blue | than one type |
|
||||
;| | 100 = Red +------------+ |
|
||||
;| | D7-D5: Colour Intensity (when D0 == 0) |
|
||||
;| | 000 = None +--+ |
|
||||
;| | 001 = Intensify green | NOTE: Do not use more |
|
||||
;| | 010 = Intensify blue | than one type |
|
||||
;| | 100 = Intensify red +--+ |
|
||||
;| | D4: Sprite Visibility |
|
||||
;| | 0 = Sprites not displayed |
|
||||
;| | 1 = Sprites visible |
|
||||
;| | D3: Background Visibility |
|
||||
;| | 0 = Background not displayed |
|
||||
;| | 1 = Background visible |
|
||||
;| | D2: Sprite Clipping |
|
||||
;| | 0 = Sprites invisible in left 8-pixel column |
|
||||
;| | 1 = No clipping |
|
||||
;| | D1: Background Clipping |
|
||||
;| | 0 = BG invisible in left 8-pixel column |
|
||||
;| | 1 = No clipping |
|
||||
;| | D0: Display Type |
|
||||
;| | 0 = Colour display |
|
||||
;| | 1 = Monochrome display |
|
||||
;| $2001 | PPU Control Register #2 (W) |
|
||||
;| | |
|
||||
;| | D7-D5: Full Background Colour (when D0 == 1) |
|
||||
;| | 000 = None +------------+ |
|
||||
;| | 001 = Green | NOTE: Do not use more |
|
||||
;| | 010 = Blue | than one type |
|
||||
;| | 100 = Red +------------+ |
|
||||
;| | D7-D5: Colour Intensity (when D0 == 0) |
|
||||
;| | 000 = None +--+ |
|
||||
;| | 001 = Intensify green | NOTE: Do not use more |
|
||||
;| | 010 = Intensify blue | than one type |
|
||||
;| | 100 = Intensify red +--+ |
|
||||
;| | D4: Sprite Visibility |
|
||||
;| | 0 = Sprites not displayed |
|
||||
;| | 1 = Sprites visible |
|
||||
;| | D3: Background Visibility |
|
||||
;| | 0 = Background not displayed |
|
||||
;| | 1 = Background visible |
|
||||
;| | D2: Sprite Clipping |
|
||||
;| | 0 = Sprites invisible in left 8-pixel column |
|
||||
;| | 1 = No clipping |
|
||||
;| | D1: Background Clipping |
|
||||
;| | 0 = BG invisible in left 8-pixel column |
|
||||
;| | 1 = No clipping |
|
||||
;| | D0: Display Type |
|
||||
;| | 0 = Colour display |
|
||||
;| | 1 = Monochrome display |
|
||||
;+---------+----------------------------------------------------------+
|
||||
|
||||
|
||||
;-----------------------------------------------------------------------------
|
||||
|
||||
.proc ppuinit
|
||||
.proc ppuinit
|
||||
|
||||
lda #%10101000
|
||||
sta PPU_CTRL1
|
||||
lda #%10101000
|
||||
sta PPU_CTRL1
|
||||
|
||||
lda #%00011110
|
||||
sta PPU_CTRL2
|
||||
lda #%00011110
|
||||
sta PPU_CTRL2
|
||||
|
||||
; Wait for vblank
|
||||
|
||||
@wait: lda PPU_STATUS
|
||||
bpl @wait
|
||||
@wait: lda PPU_STATUS
|
||||
bpl @wait
|
||||
|
||||
; reset scrolling
|
||||
|
||||
lda #0
|
||||
sta PPU_VRAM_ADDR1
|
||||
sta PPU_VRAM_ADDR1
|
||||
lda #0
|
||||
sta PPU_VRAM_ADDR1
|
||||
sta PPU_VRAM_ADDR1
|
||||
|
||||
; Make all sprites invisible
|
||||
|
||||
lda #$00
|
||||
ldy #$f0
|
||||
sta PPU_SPR_ADDR
|
||||
ldx #$40
|
||||
@loop: sty PPU_SPR_IO
|
||||
sta PPU_SPR_IO
|
||||
sta PPU_SPR_IO
|
||||
sty PPU_SPR_IO
|
||||
dex
|
||||
bne @loop
|
||||
lda #$00
|
||||
ldy #$f0
|
||||
sta PPU_SPR_ADDR
|
||||
ldx #$40
|
||||
@loop: sty PPU_SPR_IO
|
||||
sta PPU_SPR_IO
|
||||
sta PPU_SPR_IO
|
||||
sty PPU_SPR_IO
|
||||
dex
|
||||
bne @loop
|
||||
|
||||
rts
|
||||
rts
|
||||
|
||||
.endproc
|
||||
|
||||
|
||||
;-----------------------------------------------------------------------------
|
||||
|
||||
.proc paletteinit
|
||||
.proc paletteinit
|
||||
|
||||
; Wait for v-blank
|
||||
@wait: lda PPU_STATUS
|
||||
bpl @wait
|
||||
@wait: lda PPU_STATUS
|
||||
bpl @wait
|
||||
|
||||
lda #$3F
|
||||
sta PPU_VRAM_ADDR2
|
||||
lda #$00
|
||||
sta PPU_VRAM_ADDR2
|
||||
lda #$3F
|
||||
sta PPU_VRAM_ADDR2
|
||||
lda #$00
|
||||
sta PPU_VRAM_ADDR2
|
||||
|
||||
ldx #0
|
||||
@loop: lda paldata,x
|
||||
sta PPU_VRAM_IO
|
||||
ldx #0
|
||||
@loop: lda paldata,x
|
||||
sta PPU_VRAM_IO
|
||||
inx
|
||||
cpx #(16*2)
|
||||
bne @loop
|
||||
cpx #(16*2)
|
||||
bne @loop
|
||||
|
||||
rts
|
||||
|
||||
rts
|
||||
|
||||
.endproc
|
||||
|
||||
;-----------------------------------------------------------------------------
|
||||
@ -134,25 +134,24 @@
|
||||
.rodata
|
||||
|
||||
paldata:
|
||||
.repeat 2
|
||||
.byte $0f ; 0 black
|
||||
.byte $14 ; 4 violett
|
||||
.byte $3b ; 3 cyan
|
||||
.byte $3d ; 1 white
|
||||
.repeat 2
|
||||
.byte $0f ; 0 black
|
||||
.byte $14 ; 4 violett
|
||||
.byte $3b ; 3 cyan
|
||||
.byte $3d ; 1 white
|
||||
|
||||
.byte $38 ; 7 yellow
|
||||
.byte $2d ; b dark grey
|
||||
.byte $22 ; e light blue
|
||||
.byte $04 ; 2 red
|
||||
.byte $38 ; 7 yellow
|
||||
.byte $2d ; b dark grey
|
||||
.byte $22 ; e light blue
|
||||
.byte $04 ; 2 red
|
||||
|
||||
.byte $18 ; 8 orange
|
||||
.byte $08 ; 9 brown
|
||||
.byte $35 ; a light red
|
||||
.byte $01 ; 6 blue
|
||||
|
||||
.byte $10 ; c middle grey
|
||||
.byte $2b ; d light green
|
||||
.byte $3d ; f light gray
|
||||
.byte $1a ; 5 green
|
||||
.endrepeat
|
||||
.byte $18 ; 8 orange
|
||||
.byte $08 ; 9 brown
|
||||
.byte $35 ; a light red
|
||||
.byte $01 ; 6 blue
|
||||
|
||||
.byte $10 ; c middle grey
|
||||
.byte $2b ; d light green
|
||||
.byte $3d ; f light gray
|
||||
.byte $1a ; 5 green
|
||||
.endrepeat
|
||||
|
@ -354,7 +354,7 @@ programs for the Lynx Game Console using the cc65 crosscompiler.
|
||||
%attr(644,root,root) %{_libdir}/cc65/ser/lynx-*.ser
|
||||
%attr(644,root,root) %{_libdir}/cc65/tgi/lynx-*.tgi
|
||||
%attr(644,root,root) %{_libdir}/cc65/cfg/lynx-*.cfg
|
||||
|
||||
|
||||
|
||||
|
||||
###############################################################################
|
||||
@ -375,6 +375,7 @@ crosscompiler.
|
||||
%files nes
|
||||
%attr(644,root,root) %{_libdir}/cc65/lib/nes.lib
|
||||
%attr(644,root,root) %{_libdir}/cc65/joy/nes-*.joy
|
||||
%attr(644,root,root) %{_libdir}/cc65/tgi/nes-*.tgi
|
||||
|
||||
|
||||
|
||||
|
Loading…
x
Reference in New Issue
Block a user