From 25031ddb673af8208336960199131e771cc393f8 Mon Sep 17 00:00:00 2001 From: alpine9000 Date: Thu, 10 Mar 2016 08:44:32 +1100 Subject: [PATCH] Initial test of laced mode --- 014.lace_mode/Makefile | 15 +++++++ 014.lace_mode/README.md | 9 ++++ 014.lace_mode/constants.i | 10 +++++ 014.lace_mode/demo.pal | 16 +++++++ 014.lace_mode/gigi.pal | 16 +++++++ 014.lace_mode/init.s | 29 +++++++++++++ 014.lace_mode/lace_mode.s | 89 +++++++++++++++++++++++++++++++++++++++ 014.lace_mode/utils.s | 23 ++++++++++ 8 files changed, 207 insertions(+) create mode 100644 014.lace_mode/Makefile create mode 100644 014.lace_mode/README.md create mode 100644 014.lace_mode/constants.i create mode 100644 014.lace_mode/demo.pal create mode 100644 014.lace_mode/gigi.pal create mode 100644 014.lace_mode/init.s create mode 100644 014.lace_mode/lace_mode.s create mode 100644 014.lace_mode/utils.s diff --git a/014.lace_mode/Makefile b/014.lace_mode/Makefile new file mode 100644 index 0000000..c02e320 --- /dev/null +++ b/014.lace_mode/Makefile @@ -0,0 +1,15 @@ +MODULE=lace_mode.s +FLOPPY=bin/lace_mode.adf +IMAGEDATA=out/image-palette.s out/image-ham.bin +IMAGEFILE=../assets/gigi_320x512.png +EXTRA=$(IMAGEDATA) $(BOB_IMAGEDATA) init.s utils.s constants.i Makefile +BASE_ADDRESS=40000 + +USE_PALETTE=--use-palette gigi.pal +DITHER=--dither + +include ../shared/base.mk + +$(IMAGEDATA): $(IMAGECON) $(IMAGEFILE) Makefile + $(IMAGECON) --input $(IMAGEFILE) --output out/image --ham --output-bitplanes --output-palette-asm $(USE_PALETTE) --output-palette $(DITHER) + diff --git a/014.lace_mode/README.md b/014.lace_mode/README.md new file mode 100644 index 0000000..c0deb83 --- /dev/null +++ b/014.lace_mode/README.md @@ -0,0 +1,9 @@ +interlaced playfield +==================== + +Work in progress + +try it +------ + * [Download disk image](bin/laced_mode.adf?raw=true) + * Run in SAE diff --git a/014.lace_mode/constants.i b/014.lace_mode/constants.i new file mode 100644 index 0000000..aceb242 --- /dev/null +++ b/014.lace_mode/constants.i @@ -0,0 +1,10 @@ +LVL3_INT_VECTOR equ $6c +SCREEN_WIDTH equ 320 +SCREEN_HEIGHT equ 512 +SCREEN_WIDTH_BYTES equ (SCREEN_WIDTH/8) +SCREEN_BIT_DEPTH equ 6 +SCREEN_RES equ 8 ; 8=lo resolution, 4=hi resolution +RASTER_X_START equ $81 ; hard coded coordinates from hardware manual +RASTER_Y_START equ $2c +RASTER_X_STOP equ RASTER_X_START+SCREEN_WIDTH +RASTER_Y_STOP equ RASTER_Y_START+256 diff --git a/014.lace_mode/demo.pal b/014.lace_mode/demo.pal new file mode 100644 index 0000000..535ad8c --- /dev/null +++ b/014.lace_mode/demo.pal @@ -0,0 +1,16 @@ +caa +d2d +cef +333 +c85 +4be +be3 +c7f +d18 +222 +655 +25d +c97 +6c2 +d22 +cda diff --git a/014.lace_mode/gigi.pal b/014.lace_mode/gigi.pal new file mode 100644 index 0000000..ea66f13 --- /dev/null +++ b/014.lace_mode/gigi.pal @@ -0,0 +1,16 @@ +875 +542 +ca7 +89a +421 +853 +c85 +565 +cc9 +a63 +211 +642 +689 +8ab +531 +997 diff --git a/014.lace_mode/init.s b/014.lace_mode/init.s new file mode 100644 index 0000000..186620b --- /dev/null +++ b/014.lace_mode/init.s @@ -0,0 +1,29 @@ + include "../include/bplconbits.i" + ;; custom chip base globally in a6 +init: + movem.l d0-a6,-(sp) + move #$7ff,DMACON(a6) ; disable all dma + move #$7fff,INTENA(a6) ; disable all interrupts + + ;; set up default palette + bsr.s installColorPalette + + ;; set up playfield + move.w #(RASTER_Y_START<<8)|RASTER_X_START,DIWSTRT(a6) + move.w #((RASTER_Y_STOP-256)<<8)|(RASTER_X_STOP-256),DIWSTOP(a6) + + move.w #(RASTER_X_START/2-SCREEN_RES),DDFSTRT(a6) + move.w #(RASTER_X_START/2-SCREEN_RES)+(8*((SCREEN_WIDTH/16)-1)),DDFSTOP(a6) + + move.w #(SCREEN_BIT_DEPTH<<12)|COLOR_ON|HOMOD|LACE,BPLCON0(a6) + move.w #2*SCREEN_WIDTH_BYTES*SCREEN_BIT_DEPTH-SCREEN_WIDTH_BYTES,BPL1MOD(a6) + move.w #2*SCREEN_WIDTH_BYTES*SCREEN_BIT_DEPTH-SCREEN_WIDTH_BYTES,BPL2MOD(a6) + + ;; install copper list, then enable dma and selected interrupts + lea copper(pc),a0 + move.l a0,COP1LC(a6) + move.w COPJMP1(a6),d0 + move.w #(DMAF_BLITTER|DMAF_SETCLR!DMAF_COPPER!DMAF_RASTER!DMAF_MASTER),DMACON(a6) + ;; move.w #(INTF_SETCLR|INTF_VERTB|INTF_INTEN),INTENA(a6) + movem.l (sp)+,d0-a6 + rts \ No newline at end of file diff --git a/014.lace_mode/lace_mode.s b/014.lace_mode/lace_mode.s new file mode 100644 index 0000000..c76da38 --- /dev/null +++ b/014.lace_mode/lace_mode.s @@ -0,0 +1,89 @@ + include "../include/registers.i" + include "hardware/dmabits.i" + include "hardware/intbits.i" + + include "constants.i" + +entry: + lea CUSTOM,a6 + bsr init + bsr.s installColorPalette + +.mainLoop: + bsr waitVerticalBlank + cmpi.w #0,cycle + bne.s .alternate + move.w #1,cycle + bsr.s pokeBitplanePointers2 + bra .done +.alternate: + move.w #0,cycle + bsr.s pokeBitplanePointers +.done + bra .mainLoop + + include "init.s" + include "utils.s" + +pokeBitplanePointers: + ;; poke bitplane pointers + movem.l d0-a6,-(sp) + lea bitplanes(pc),a1 + lea copper(pc),a2 + moveq #SCREEN_BIT_DEPTH-1,d0 +.bitplaneloop: + move.l a1,d1 + move.w d1,2(a2) + swap d1 + move.w d1,6(a2) + lea SCREEN_WIDTH_BYTES(a1),a1 ; bit plane data is interleaved + addq #8,a2 + dbra d0,.bitplaneloop + movem.l (sp)+,d0-a6 + rts + +pokeBitplanePointers2: + ;; poke bitplane pointers + movem.l d0-a6,-(sp) + lea bitplanes(pc),a1 + add.w #SCREEN_WIDTH_BYTES*SCREEN_BIT_DEPTH,a1 + lea copper(pc),a2 + moveq #SCREEN_BIT_DEPTH-1,d0 +.bitplaneloop: + move.l a1,d1 + move.w d1,2(a2) + swap d1 + move.w d1,6(a2) + lea SCREEN_WIDTH_BYTES(a1),a1 ; bit plane data is interleaved + addq #8,a2 + dbra d0,.bitplaneloop + movem.l (sp)+,d0-a6 + rts + + + +installColorPalette: + include "out/image-palette.s" + rts + +cycle: + dc.l 0 +copper: + ;; bitplane pointers must be first else poking addresses will be incorrect + dc.w BPL1PTL,0 + dc.w BPL1PTH,0 + dc.w BPL2PTL,0 + dc.w BPL2PTH,0 + dc.w BPL3PTL,0 + dc.w BPL3PTH,0 + dc.w BPL4PTL,0 + dc.w BPL4PTH,0 + dc.w BPL5PTL,0 + dc.w BPL5PTH,0 + dc.w BPL6PTL,0 + dc.w BPL6PTH,0 + + dc.l $fffffffe + +bitplanes: + incbin "out/image-ham.bin" \ No newline at end of file diff --git a/014.lace_mode/utils.s b/014.lace_mode/utils.s new file mode 100644 index 0000000..bdde568 --- /dev/null +++ b/014.lace_mode/utils.s @@ -0,0 +1,23 @@ +waitVerticalBlank: + movem.l d0-a6,-(sp) +.loop move.l $dff004,d0 + and.l #$1ff00,d0 + cmp.l #303<<8,d0 + bne.b .loop + movem.l (sp)+,d0-a6 + rts + + + +waitRaster: ;wait for rasterline d0.w. Modifies d0-d2/a0. + movem.l d0-a6,-(sp) + move.l #$1ff00,d2 + lsl.l #8,d0 + and.l d2,d0 + lea $dff004,a0 +.wr: move.l (a0),d1 + and.l d2,d1 + cmp.l d1,d0 + bne.s .wr + movem.l (sp)+,d0-a6 + rts \ No newline at end of file