Background Tiles Not Rendering

Code:

.segment "HEADER".byte "NES"         ; The beginning of the HEADER of iNES header.byte $1a           ; Signature of iNES header that the emulator will look for.byte $02           ; 2 * 16KB PRG (program) ROM.byte $01           ; 1 * 8KB CHR ROM .byte %00000000     ; mapper and mirroring - no mapper here due to no bank switching, no mirroring - using binary as it's easier to control.byte $0            .byte $0.byte $0.byte $0.byte $0, $0, $0, $0, $0    ; unused.segment "ZEROPAGE".segment "STARTUP".segment "CODE"hello_str: .asciiz "Hello, NES!"RESET:SEI             ; disable IRQsCLD             ; disable decimal modeLDX #$40STX $4017       ; disable APU frame counter IRQ - disable soundLDX #$ffTXS             ; setup stack starting at FF as it decrements instead of incrementingINX             ; overflow X reg to $00STX $2000       ; disable NMI - PPUCTRL regSTX $2001       ; disable rendering - PPUMASK regSTX $4010       ; disable DMC IRQsvblankwait1:        ; wait for vblank to make sure PPU is readyBIT $2002       ; returns bit 7 of ppustatus reg, which holds the vblank status with 0 being no vblank, 1 being vblankBPL vblankwait1clearmem:LDA #$00STA $0000, xSTA $0100, xSTA $0300, xSTA $0400, xSTA $0500, xSTA $0600, xSTA $0700, xLDA #$feSTA $0200, x    ; Set aside space in RAM for sprite dataINX BNE clearmemvblankwait2:        ; PPU is ready after thisBIT $2002BPL vblankwait2initpalette:LDA $2002   ; read PPU status to reset PPU addressLDA #$3F    ; Set PPU address to BG palette RAM ($3F00)STA $2006LDA #$00STA $2006LDX #4    ; Loop 4 times:STX $2007DEXBNE :-print_hello:LDA #$20STA $2006LDA #$F0STA $2006LDX #0string_loop:LDA hello_str,xBEQ set_paletteSTA $2007INXJMP string_loopset_palette:LDA #$23STA $2006LDA #$C0STA $2006LDA #0LDX #64attr_loop:STA $2007DEXBNE attr_loopLDA #0STA $2005STA $2005LDA %00001000   ; background enabledSTA $2001forever:JMP forever     ; an infinite loop when init code is run;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;NMI:PHALDA #0STA $2005STA $2005LDA %00001000   ; background enabledSTA $2001PLARTI;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;.segment "VECTORS".word  NMI.word  RESET.word  0.include "neschar.s"