don't save to local storage unless edited; handle running out of local storage
This commit is contained in:
Steven Hugg
parent
a087e6b7cf
commit
56677a25e9
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@ -0,0 +1,102 @@
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;;;;; CONSTANTS
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PPU_CTRL equ $2000
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PPU_MASK equ $2001
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PPU_STATUS equ $2002
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PPU_SCROLL equ $2005
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PPU_ADDR equ $2006
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PPU_DATA equ $2007
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DMC_FREQ equ $4010
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;;;;; CARTRIDGE FILE HEADER
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processor 6502
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seg Header
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org $7FF0
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NES_MAPPER equ 0 ;mapper number
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NES_PRG_BANKS equ 2 ;number of 16K PRG banks, change to 2 for NROM256
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NES_CHR_BANKS equ 1 ;number of 8K CHR banks (0 = RAM)
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NES_MIRRORING equ 1 ;0 horizontal, 1 vertical, 8 four screen
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.byte $4e,$45,$53,$1a ; header
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.byte NES_PRG_BANKS
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.byte NES_CHR_BANKS
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.byte NES_MIRRORING|(NES_MAPPER<<4)
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.byte NES_MAPPER&$f0
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;;;;; CODE
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seg Code
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org $8000
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start:
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_exit:
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sei ;disable IRQs
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cld ;decimal mode not supported
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ldx #$ff
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txs ;set up stack pointer
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inx ;increment X to 0
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stx PPU_MASK ;disable rendering
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stx DMC_FREQ ;disable DMC interrupts
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stx PPU_CTRL ;disable NMI interrupts
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jsr WaitSyncSafe ;wait for VSYNC
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; clear RAM -- not a subroutine because we clear the stack too
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lda #0
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tax
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.loop
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sta $0,x
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sta $100,x
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; skip $200-$2FF, used for OAM display list
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sta $300,x
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sta $400,x
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sta $500,x
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sta $600,x
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sta $700,x
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inx
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bne .loop
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; wait for PPU warmup
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jsr WaitSync
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; set palette background
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ldy #$0
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lda #$3f
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sta PPU_ADDR
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sty PPU_ADDR
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lda #$1c
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sta PPU_DATA
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; enable PPU rendering
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lda #0
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sta PPU_ADDR
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sta PPU_ADDR ;PPU addr = 0
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sta PPU_SCROLL
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sta PPU_SCROLL ;scroll = 0
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lda #$90
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sta PPU_CTRL ;enable NMI
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lda #$1e
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sta PPU_MASK ;enable rendering
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.endless
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jmp .endless ;endless loop
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;;;;; SUBROUTINES
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; wait for VSYNC to start
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WaitSyncSafe: subroutine
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bit PPU_STATUS
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WaitSync:
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bit PPU_STATUS
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bpl WaitSync
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rts
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;;;;; INTERRUPT HANDLERS
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nmi:
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irq:
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rti
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;;;;; CPU VECTORS
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org $fffa
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.word nmi ;$fffa vblank nmi
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.word start ;$fffc reset
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.word irq ;$fffe irq / brk
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@ -4,16 +4,13 @@
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PPU_CTRL equ $2000
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PPU_MASK equ $2001
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PPU_STATUS equ $2002
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PPU_OAM_ADDR equ $2003
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PPU_OAM_DATA equ $2004
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OAM_ADDR equ $2003
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OAM_DATA equ $2004
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PPU_SCROLL equ $2005
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PPU_ADDR equ $2006
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PPU_DATA equ $2007
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PPU_OAM_DMA equ $4014
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PPU_FRAMECNT equ $4017
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DMC_FREQ equ $4010
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CTRL_PORT1 equ $4016
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CTRL_PORT2 equ $4017
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;;;;; ZERO-PAGE VARIABLES
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@ -45,16 +42,33 @@ NES_MIRRORING equ 1 ;0 horizontal, 1 vertical, 8 four screen
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org $8000
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start:
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_exit:
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sei
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sei ;disable IRQs
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cld ;decimal mode not supported
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ldx #$ff
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txs
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inx ;X=0
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txs ;set up stack pointer
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inx ;increment X to 0
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stx PPU_MASK ;disable rendering
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stx DMC_FREQ ;disable DMC (samples)
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stx PPU_CTRL ;disable NMI (interrupts)
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jsr WaitSync ;wait for VSYNC
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stx DMC_FREQ ;disable DMC interrupts
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stx PPU_CTRL ;disable NMI interrupts
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jsr WaitSyncSafe ;wait for VSYNC
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; clear RAM -- not a subroutine because we clear the stack too
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lda #0
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tax
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.loop
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sta $0,x
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sta $100,x
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; skip $200-$2FF, used for OAM display list
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sta $300,x
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sta $400,x
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sta $500,x
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sta $600,x
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sta $700,x
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inx
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bne .loop
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; end of clear RAM routine
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jsr SetPalette ;set colors
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jsr ClearVRAM ;clear VRAM
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jsr FillVRAM ;set PPU RAM
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jsr WaitSync ;wait for VSYNC (and PPU warmup)
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lda #0
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sta PPU_ADDR
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sta PPU_ADDR ;PPU addr = 0
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@ -84,8 +98,8 @@ SetPalette: subroutine
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bne .loop
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rts
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; clear video RAM
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ClearVRAM: subroutine
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; fill video RAM
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FillVRAM: subroutine
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txa
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ldy #$20
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sty PPU_ADDR
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@ -101,11 +115,11 @@ ClearVRAM: subroutine
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rts
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; wait for VSYNC to start
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WaitSync: subroutine
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WaitSyncSafe: subroutine
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bit PPU_STATUS
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.1:
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WaitSync:
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bit PPU_STATUS
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bpl .1
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bpl WaitSync
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rts
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;;;;; INTERRUPT HANDLERS
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@ -8,10 +8,11 @@ var NES_NESLIB_PRESETS = [
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];
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var NES_CONIO_PRESETS = [
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{id:'hello.c', name:'Hello PPU'},
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{id:'conio.c', name:'Hello Console I/O'},
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{id:'siegegame.c', name:'Siege Game'},
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{id:'ex1.asm', name:'Assembly Example'},
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{id:'ex0.asm', name:'ASM: Initialization'},
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{id:'ex1.asm', name:'ASM: Scrolling Demo'},
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{id:'hello.c', name:'C: Hello PPU'},
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{id:'conio.c', name:'C: Hello Console I/O'},
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{id:'siegegame.c', name:'C: Siege Game'},
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];
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/// JSNES
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33
src/ui.js
33
src/ui.js
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@ -35,13 +35,39 @@ Javatari.AUTO_START = false;
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var PRESETS; // presets array
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var platform_id;
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var platform; // platform object
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var originalFileID;
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var originalText;
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var toolbar = $("#controls_top");
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function getBiggestItems(storage) {
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var items = [];
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for (var i = 0; i < storage.length; i++) {
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var key = storage.key(i);
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items.push([lpad(storage.getItem(key).length+"", 12), key]);
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}
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items.sort();
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var s = "";
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for (var i=items.length-5; i<items.length; i++) {
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s += items[i] + "\n";
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}
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return s;
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}
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var FileStore = function(storage, prefix) {
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var self = this;
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this.saveFile = function(name, text) {
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storage.setItem(prefix + name, text);
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try {
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storage.setItem(prefix + name, text);
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} catch (e) {
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if (e.name == 'NS_ERROR_DOM_QUOTA_REACHED') {
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console.log(e);
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alert("Sorry, you've reached your local storage quota for this browser.\n\nHere are the biggest items:\n\n" +
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getBiggestItems(storage));
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} else {
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throw e;
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}
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}
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}
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this.loadFile = function(name) {
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return storage.getItem(prefix + name) || storage.getItem(name);
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@ -181,7 +207,7 @@ function setLastPreset(id) {
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}
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function updatePreset(current_preset_id, text) {
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if (text.trim().length) {
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if (text.trim().length && (originalFileID != current_preset_id || text != originalText)) {
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store.saveFile(current_preset_id, text);
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}
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}
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@ -193,6 +219,8 @@ function loadCode(text, fileid) {
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editor.clearHistory();
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current_output = null;
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setLastPreset(fileid);
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originalFileID = fileid;
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originalText = text;
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}
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function loadFile(fileid, filename, index) {
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@ -220,7 +248,6 @@ function loadFile(fileid, filename, index) {
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var ext = platform.getToolForFilename(fileid);
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$.get( "presets/"+platform_id+"/skeleton."+ext, function( text ) {
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loadCode(text, fileid);
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updatePreset(fileid, text);
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}, 'text')
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.fail(function() {
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alert("Could not load skeleton for " + platform_id + "/" + ext);
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