300 In 1 Nes Rom 🔥 Recommended

; Simple menu handler for a 300‑in‑1 cart ; Assumes mapper registers at $8000‑$8003 ORG $8000 StartMenu: LDX #$00 ; X = selected entry (0‑299) Loop: JSR DrawMenuItem ; display title for X JSR GetInput ; read D‑pad BEQ Loop ; no change CMP #UP BNE CheckDown DEX BPL Loop LDX #$2B ; wrap to last entry (299) JMP Loop CheckDown: CMP #DOWN BNE CheckSelect INX CPX #$2C ; 300 entries BNE Loop LDX #$00 ; wrap to first entry JMP Loop CheckSelect: CMP #START BNE Loop ; Write selected bank to mapper STX $8000 JMP $C000 ; jump to game start

While these ROMs work on original NES hardware, they are often designed for 3.3V logic, which can potentially damage original 5V NES systems or cause the console to run hot. The "Good" (Pros) 300 in 1 nes rom

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