mirror of
https://github.com/Abdess/retroarch_system.git
synced 2026-11-01 00:27:20 -05:00
Abdessamad Derraz
e7aa9e870b
Each libretro profile records version_basis and core_version is read there at its pin. snes9x states 1.63 in snes9x.h, nestopia 2.0.0, mgba 0.11.0, vice 3.10, atari800's libretro tree 7.0.0. Cores whose build takes its version from git carry the nearest tag in describe form (flycast v2.7-90-ge88b0ce, ppsspp, duckstation, gearcoleco), placeholders copied from .info files (Git, SVN) are replaced by the code's statement, and a code that states none is null with kind none.
55 lines
2.0 KiB
YAML
55 lines
2.0 KiB
YAML
emulator: JAXE
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type: libretro
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core_classification: official_port
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source: "https://github.com/kurtjd/jaxe"
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upstream: "https://github.com/kurtjd/jaxe"
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profiled_date: "2026-03-24"
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source_commit: "c767afd785e01a15bcd575a2d93b737add82b675"
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core_version: "1.0"
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version_basis:
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kind: file
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path: "src/libretro.c"
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pattern: 'library_version\s*=\s*"([^"]+)"'
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display_name: "CHIP-8/S-CHIP/XO-CHIP (JAXE)"
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cores:
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- jaxe
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systems:
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- chip8
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notes: |
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JAXE is a CHIP-8, SCHIP, and XO-CHIP emulator by Kurtis Dinelle,
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ported to libretro. Supports .ch8, .sc8, .xo8, and .hc8 ROMs.
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No external BIOS or font files required. The core has firmware_count = 0
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in jaxe_libretro.info and never calls RETRO_ENVIRONMENT_GET_SYSTEM_DIR.
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Font data is hardcoded in chip8_load_font() at src/chip8.c:118-168.
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The standard 4x5 hex font (0-F, 80 bytes) is loaded at address 0x000,
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and the SCHIP 8x10 big hex font (0-F, 160 bytes) follows immediately
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after at address 0x050. Both are written directly into chip8->RAM[]
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during chip8_reset() -> chip8_load_font().
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Memory layout from include/chip8.h:42-45:
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0x000-0x04F standard font (NUM_FONT_BYTES = 80)
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0x050-0x0EF big font (NUM_BIG_FONT_BYTES = 160)
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0x0F0-0x0FF stack (STACK_SIZE = 16)
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0x100-0x10F audio buffer (AUDIO_BUF_SIZE = 16)
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0x200+ program ROM (PC_START_ADDR_DEFAULT)
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The fonts/dbgfont.ttf file in the repo is only used by the standalone
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build (src/main.c:19) for the SDL debugger overlay, not by the
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libretro core.
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files: []
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platform_details:
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bios_mapping:
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target: "none"
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source_ref: "libretro-core-info jaxe_libretro.info:17, src/chip8.c:118-168"
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note: |
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All font/sprite data is compiled into the binary. The standard
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CHIP-8 hex font (5 bytes per character, 16 characters) and the
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SCHIP big hex font (10 bytes per character, 16 characters) are
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stored as a static array in chip8_load_font() and copied into
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RAM on every reset. No file I/O is performed for BIOS or fonts.
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