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nes: bank switching .cfg for MMC3 via NES_MAPPER=4; reverse A/B btns
This commit is contained in:
Steven Hugg
parent
1e44d05536
commit
98ccf2b26a
76
presets/nes/bankswitch.c
Normal file
76
presets/nes/bankswitch.c
Normal file
@ -0,0 +1,76 @@
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// bank-switching configuration
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#define NES_MAPPER 4 // Mapper 4 (MMC3)
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#define NES_PRG_BANKS 4 // # of 16KB PRG banks
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#define NES_CHR_BANKS 8 // # of 8KB CHR banks
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#include <peekpoke.h>
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#include <string.h>
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#include "neslib.h"
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// link the pattern table into CHR ROM
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//#link "chr_generic.s"
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#define MMC_MODE 0x00
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#define MMC3_SET_REG(r,n)\
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POKE(0x8000, MMC_MODE|(r));\
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POKE(0x8001, (n));
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#define MMC3_CHR_0000(n) MMC3_SET_REG(0,n)
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#define MMC3_CHR_0800(n) MMC3_SET_REG(1,n)
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#define MMC3_CHR_1000(n) MMC3_SET_REG(2,n)
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#define MMC3_CHR_1400(n) MMC3_SET_REG(3,n)
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#define MMC3_CHR_1800(n) MMC3_SET_REG(4,n)
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#define MMC3_CHR_1C00(n) MMC3_SET_REG(5,n)
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#define MMC3_PRG_8000(n) MMC3_SET_REG(6,n)
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#define MMC3_PRG_A000(n) MMC3_SET_REG(7,n)
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#define MMC3_MIRROR(n) POKE(0xa000, (n))
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#pragma rodata-name("CODE0")
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const unsigned char TEXT0[]={"Bank 0 @ 8000"};
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#pragma rodata-name("CODE1")
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const unsigned char TEXT1[]={"Bank 1 @ 8000"};
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#pragma rodata-name("CODE5")
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const unsigned char TEXT5[]={"Bank 5 @ A000"};
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#pragma rodata-name("CODE6")
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const unsigned char TEXT6[]={"Bank 6 @ C000"};
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// put functions in bank 0
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#pragma code-name("CODE1")
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void draw_text(word addr, const char* text) {
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vram_adr(addr);
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vram_write(text, strlen(text));
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}
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// back to main code segment
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#pragma code-name("CODE")
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void main(void)
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{
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// set palette colors
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pal_col(1,0x04);
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pal_col(2,0x20);
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pal_col(3,0x30);
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// setup CHR bank switching for background
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MMC3_CHR_0000(0);
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MMC3_CHR_0800(1);
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// select bank 0 in $8000-$9fff
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MMC3_PRG_8000(0);
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vram_adr(NTADR_A(2,2));
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vram_write(TEXT0, 13);
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// select bank 1 in $8000-$9fff
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// also needed to call draw_text()
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MMC3_PRG_8000(1);
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draw_text(NTADR_A(2,3), TEXT1);
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// select bank 5 in $a000-$bfff
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MMC3_PRG_A000(5);
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draw_text(NTADR_A(2,4), TEXT5);
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// $c000-$dfff is fixed to bank 6
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draw_text(NTADR_A(2,5), TEXT6);
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//enable rendering
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ppu_on_all();
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while(1);//do nothing, infinite loop
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}
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@ -47,3 +47,4 @@ void main(void)
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show_title_screen(climbr_title_pal, climbr_title_rle);
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while(1);//do nothing, infinite loop
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}
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@ -33,6 +33,7 @@ const JSNES_PRESETS = [
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{id:'scrollrt.asm', name:'Split Screen Scroll (ASM)'},
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{id:'fami.c', name:'Famitone Demo'},
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{id:'musicdemo.asm', name:'Famitone Demo (ASM)'},
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{id:'bankswitch.c', name:'Bank Switching'},
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];
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const NES_NESLIB_PRESETS = [
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@ -54,8 +55,8 @@ const NES_CONIO_PRESETS = [
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/// JSNES
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const JSNES_KEYCODE_MAP = makeKeycodeMap([
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[Keys.VK_Z, 0, 0],
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[Keys.VK_X, 0, 1],
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[Keys.VK_X, 0, 0],
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[Keys.VK_Z, 0, 1],
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[Keys.VK_SPACE, 0, 2],
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[Keys.VK_ENTER, 0, 3],
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[Keys.VK_UP, 0, 4],
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@ -831,7 +831,7 @@ export class MemoryMapView implements ProjectView {
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var curofs = 0;
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for (var seg of segments) {
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//var used = seg.last ? (seg.last-seg.start) : seg.size;
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if (curofs != seg.start)
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if (seg.start > curofs)
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this.addSegment({name:'',start:curofs, size:seg.start-curofs});
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this.addSegment(seg);
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curofs = seg.start + seg.size;
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76
src/worker/lib/nes/nesbanked.cfg
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76
src/worker/lib/nes/nesbanked.cfg
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@ -0,0 +1,76 @@
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SYMBOLS {
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__STACKSIZE__: type = weak, value = $0300; # 3 pages stack
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}
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MEMORY {
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ZP: file = "", start = $0002, size = $00FE, type = rw, define = yes;
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# INES Cartridge Header
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HEADER: file = %O, start = $0000, size = $0010, fill = yes;
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# 5 16K ROM Banks @ $8000
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PRG0: start = $8000, size = $2000, file = %O ,fill = yes, define = yes;
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PRG1: start = $8000, size = $2000, file = %O ,fill = yes, define = yes;
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PRG2: start = $8000, size = $2000, file = %O ,fill = yes, define = yes;
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PRG3: start = $8000, size = $2000, file = %O ,fill = yes, define = yes;
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PRG4: start = $8000, size = $2000, file = %O ,fill = yes, define = yes;
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# fixed 16K ROM banks @ $a000 and $c000
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PRG5: start = $a000, size = $2000, file = %O ,fill = yes, define = yes;
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PRG6: start = $c000, size = $2000, file = %O ,fill = yes, define = yes;
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# final bank has
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# - startup
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# - code
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# - vectors
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PRG7: file = %O, start = $E000, size = $1FFA, fill = yes, define = yes;
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VECTORS: file = %O, start = $FFFA, size = $0006, fill = yes;
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# 8 8k CHR Banks (64k)
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CHR: file = %O, start = $0000, size = $10000, fill = yes;
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# standard 2k SRAM (-zeropage)
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# $0100-$0200 cpu stack
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# $0200-$0500 3 pages for ppu memory write buffer
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# $0500-$0800 3 pages for cc65 parameter stack
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SRAM: file = "", start = $0500, size = __STACKSIZE__, define = yes;
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# additional 8K SRAM Bank
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# - data (run)
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# - bss
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# - heap
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RAM: file = "", start = $6000, size = $2000, define = yes;
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}
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SEGMENTS {
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ZEROPAGE: load = ZP, type = zp;
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HEADER: load = HEADER, type = ro;
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CODE0: load = PRG0, type = ro, define = yes, optional = yes;
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CODE1: load = PRG1, type = ro, define = yes, optional = yes;
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CODE2: load = PRG2, type = ro, define = yes, optional = yes;
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CODE3: load = PRG3, type = ro, define = yes, optional = yes;
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CODE4: load = PRG4, type = ro, define = yes, optional = yes;
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CODE5: load = PRG5, type = ro, define = yes, optional = yes;
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CODE6: load = PRG6, type = ro, define = yes, optional = yes;
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RODATA: load = PRG6, type = ro, define = yes;
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ONCE: load = PRG6, type = ro, optional = yes;
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DATA: load = PRG6, run = RAM, type = rw, define = yes;
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STARTUP: load = PRG6, type = ro, define = yes;
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CODE: load = PRG7, type = ro, define = yes;
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VECTORS: load = VECTORS, type = rw;
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CHARS: load = CHR, type = rw;
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BSS: load = SRAM, type = bss, define = yes;
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}
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FEATURES {
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CONDES: type = constructor,
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label = __CONSTRUCTOR_TABLE__,
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count = __CONSTRUCTOR_COUNT__,
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segment = ONCE;
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CONDES: type = destructor,
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label = __DESTRUCTOR_TABLE__,
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count = __DESTRUCTOR_COUNT__,
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segment = RODATA;
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CONDES: type = interruptor,
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label = __INTERRUPTOR_TABLE__,
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count = __INTERRUPTOR_COUNT__,
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segment = RODATA,
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import = __CALLIRQ__;
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}
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@ -168,12 +168,12 @@ var PLATFORM_PARAMS = {
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define: '__NES__',
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cfgfile: 'neslib.cfg',
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libargs: ['crt0.o', 'nes.lib',
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'-D', 'NES_MAPPER=0', // UxROM
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'-D', 'NES_PRG_BANKS=2', // 2 PRG banks
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'-D', 'NES_MAPPER=0', // NROM
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'-D', 'NES_PRG_BANKS=2', // 2 16K PRG banks
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'-D', 'NES_CHR_BANKS=1', // 1 CHR bank
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'-D', 'NES_MIRRORING=0', // horizontal mirroring
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],
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extra_link_files: ['crt0.o'],
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extra_link_files: ['crt0.o', 'nesbanked.cfg'],
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extra_segments:[
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//{name:'Work RAM',start:0x0,size:0x800,type:'ram'},
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{name:'OAM Buffer',start:0x200,size:0x100,type:'ram'},
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@ -492,7 +492,8 @@ function loadNative(modulename:string) {
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// mount the filesystem at /share
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function setupFS(FS, name:string) {
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var WORKERFS = FS.filesystems['WORKERFS']
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var WORKERFS = FS.filesystems['WORKERFS'];
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if (!fsMeta[name]) throw "No filesystem for '" + name + "'";
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FS.mkdir('/share');
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FS.mount(WORKERFS, {
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packages: [{ metadata: fsMeta[name], blob: fsBlob[name] }]
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@ -901,16 +902,16 @@ function linkLD65(step:BuildStep) {
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printErr:function(s) { errors.push({msg:s,line:0}); }
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});
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var FS = LD65['FS'];
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var cfgfile = '/' + platform + '.cfg';
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setupFS(FS, '65-'+getRootPlatform(platform));
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populateFiles(step, FS);
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populateExtraFiles(step, FS, params.extra_link_files);
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var libargs = params.libargs;
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var cfgfile = params.cfgfile;
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var args = ['--cfg-path', '/share/cfg',
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'--lib-path', '/share/lib',
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'--lib-path', '/share/target/apple2/drv', // TODO
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'-D', '__EXEHDR__=0', // TODO
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'-C', params.cfgfile,
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'-C', cfgfile,
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'-Ln', 'main.vice',
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//'--dbgfile', 'main.dbg',
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'-o', 'main', '-m', 'main.map'].concat(step.args, libargs);
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@ -944,7 +945,7 @@ function linkLD65(step:BuildStep) {
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var seg_re = /^__(\w+)_SIZE__$/;
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var segments = [].concat(params.extra_segments||[]);
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segments.push({name:'CPU Stack',start:0x100,size:0x100,type:'ram'});
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segments.push({name:'CPU Vectors',start:0xfffc,size:0x6,type:'rom'});
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segments.push({name:'CPU Vectors',start:0xfffa,size:0x6,type:'rom'});
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// TODO: CHR, banks, etc
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for (let ident in symbolmap) {
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let m = seg_re.exec(ident);
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@ -953,9 +954,9 @@ function linkLD65(step:BuildStep) {
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let segstart = symbolmap['__'+seg+'_RUN__'] || symbolmap['__'+seg+'_START__'];
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let segsize = symbolmap['__'+seg+'_SIZE__'];
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let seglast = symbolmap['__'+seg+'_LAST__'];
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if (segstart >= 0 && segsize > 0 && seg != 'PRG' && seg != 'RAM') { // TODO
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if (segstart >= 0 && segsize > 0 && !seg.startsWith('PRG') && seg != 'RAM') { // TODO
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var type = null;
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if (seg == 'CODE' || seg == 'STARTUP' || seg == 'RODATA') type = 'rom';
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if (seg.startsWith('CODE') || seg == 'STARTUP' || seg == 'RODATA') type = 'rom';
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else if (seg == 'ZP' || seg == 'RAM' || seg == 'DATA' || seg == 'BSS') type = 'ram';
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segments.push({name:seg, start:segstart, size:segsize, last:seglast, type:type});
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}
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@ -986,7 +987,8 @@ function linkLD65(step:BuildStep) {
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}
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}
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function fixParamsWithDefines(path:string, libargs:string[]){
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function fixParamsWithDefines(path:string, params){
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var libargs = params.libargs;
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if (path && libargs) {
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var code = getWorkFileAsString(path);
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if (code) {
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@ -999,7 +1001,7 @@ function fixParamsWithDefines(path:string, libargs:string[]){
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}
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}
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// find #defines and replace them
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var re = /^#define\s+(\w+)\s+(.+)/gmi;
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var re = /^#define\s+(\w+)\s+(\S+)/gmi;
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var m;
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while (m = re.exec(code)) {
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var ident = m[1];
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@ -1007,7 +1009,12 @@ function fixParamsWithDefines(path:string, libargs:string[]){
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var index = ident2index[ident];
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if (index >= 0) {
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libargs[index] = ident + "=" + value;
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console.log(index, libargs[index]);
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console.log('Using libargs', index, libargs[index]);
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// TODO: MMC3 mapper switch
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if (ident == 'NES_MAPPER' && value == '4') {
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params.cfgfile = 'nesbanked.cfg';
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console.log('Using config file', params.cfgfile);
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}
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}
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}
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}
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@ -1044,7 +1051,7 @@ function compileCC65(step:BuildStep) {
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var FS = CC65['FS'];
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setupFS(FS, '65-'+getRootPlatform(step.platform));
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populateFiles(step, FS);
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fixParamsWithDefines(step.path, params.libargs);
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fixParamsWithDefines(step.path, params);
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execMain(step, CC65, ['-T', '-g',
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'-Oirs',
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'-Cl', // static locals
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@ -97,6 +97,7 @@ describe('Worker', function() {
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compile('plasm', 'word x = ', 'apple2', done, 0, 0, 1);
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});
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*/
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// TODO: test NES bank switching, mapper
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it('should compile CC65', function(done) {
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compile('cc65', 'int main() {\nint x=1;\nreturn x+2;\n}', 'nes-conio', done, 40976, 3);
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});
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