nx_chip8.nx

buildroot/runtime/nx_chip8.nx

11031 B261 linesdepth 0pulls 0 transitivereach 2 importersview sourcekind librarytopic chip8

about

nx_chip8.nx -- Implements a CHIP-8 interpreter with framebuffer, input, timers, and memory management in a single binary.

imports: none

imported by: nx_chip8_font_gate.nxnx_chip8_gate.nx

none

2	const O_MAGIC_4096: i64 = 4096
3	const O_MAGIC_2048: i64 = 2048
4	const O_MAGIC_439041101: i64 = 439041101
5	const O_MAGIC_88172645463325252: i64 = 88172645463325252
15	const O_MEM: i64 = 0 // 4096 guest bytes (programs load at 0x200)
16	const O_V: i64 = 4096 // 16 V registers (i64 each, hold an 8-bit value) -> 4224
17	const O_REG: i64 = 4224 // 6 i64: I, PC, SP, DT, ST, RNG -> 4272
18	const O_STACK: i64 = 4272 // 16-level call stack (i64) -> 4400
19	const O_KEYS: i64 = 4400 // 16 key states 0/1 (i64) -> 4528
20	const O_DISP: i64 = 4528 // 64*32 display pixels 0/1 (i64) -> 20912
22	const RI_I: i64 = 0
23	const RI_PC: i64 = 1
24	const RI_SP: i64 = 2
25	const RI_DT: i64 = 3
26	const RI_ST: i64 = 4
27	const RI_RNG: i64 = 5

30	func ch8_fw(mem: *u8, off: i64, a: i64, b: i64, c: i64, d: i64, e: i64) -> i64 called by 1: ch8_load_font
35	func ch8_load_font(base: i64) -> i64 called by 1: ch8_reset calls 1: ch8_fw
56	func ch8_reset(base: i64) -> i64 called by 2: main main calls 1: ch8_load_font
80	func ch8_load(base: i64, addr: i64, byte: i64) -> i64 called by 2: main main
87	func ch8_rand(s: i64) -> i64 called by 1: ch8_step
97	func ch8_step(base: i64) -> i64 called by 3: ch8_run_frame main main calls 1: ch8_rand
239	func ch8_run_frame(base: i64, cycles: i64) -> i64 calls 1: ch8_step
249	func ch8_key(base: i64, k: i64, down: i64) -> i64
254	func ch8_reg(base: i64, xi: i64) -> i64 { let V: i64 = (base + O_V) as i64; return V[xi & 15] } called by 1: main
255	func ch8_vf(base: i64) -> i64 { let V: i64 = (base + O_V) as i64; return V[15] } called by 1: main
256	func ch8_geti(base: i64) -> i64 { let reg: i64 = (base + O_REG) as i64; return reg[RI_I] } called by 2: main main
257	func ch8_getpc(base: i64) -> i64 { let reg: i64 = (base + O_REG) as i64; return reg[RI_PC] }
258	func ch8_pixel(base: i64, px: i64, py: i64) -> i64 { let disp: i64 = (base + O_DISP) as i64; return disp[py * 64 + px] } called by 2: main main
259	func ch8_disp_off() -> i64 { return O_DISP }
260	func ch8_disp_w() -> i64 { return 64 }
261	func ch8_disp_h() -> i64 { return 32 }