2026

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2025 Return Infinity
+Copyright (c) 2026 Return Infinity
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

docs/CREDITS.TXT

@@ -1,17 +1,17 @@
-===============================================================================
-Pure64 -- a 64-bit loader written in Assembly for x86-64 systems
-Copyright (C) 2008-2025 Return Infinity -- see LICENSE.TXT
-===============================================================================
-
-
-PROJECT ADMIN (MAIN CODE AND DOCUMENTATION)
-
- * Ian Seyler -- ian.seyler@returninfinity.com
-
-
-DEVELOPMENT AND TESTING
-
- * Members of OSDev.org
-
-
-===============================================================================
+===============================================================================
+Pure64 -- a 64-bit loader written in Assembly for x86-64 systems
+Copyright (C) 2008-2026 Return Infinity -- see LICENSE.TXT
+===============================================================================
+
+
+PROJECT ADMIN (MAIN CODE AND DOCUMENTATION)
+
+ * Ian Seyler -- ian.seyler@returninfinity.com
+
+
+DEVELOPMENT AND TESTING
+
+ * Members of OSDev.org
+
+
+===============================================================================

src/boot/bios-floppy.asm

@@ -1,6 +1,6 @@
 ; =============================================================================
 ; Pure64 MBR -- a 64-bit OS/software loader written in Assembly for x86-64 systems
-; Copyright (C) 2008-2025 Return Infinity -- see LICENSE.TXT
+; Copyright (C) 2008-2026 Return Infinity -- see LICENSE.TXT
 ;
 ; This Master Boot Record will load Pure64 from a pre-defined location on the
 ; floppy drive without making use of the file system.
@@ -149,13 +149,13 @@ VBESearch:
 
 	; Read the 2nd stage boot loader into memory.
 	; Load 4 cylinders - 7 sectors
-	mov byte [cylinder], 0 
+	mov byte [cylinder], 0
 	mov word [sec_buff], 0x7E00	; For simplicity load whole cylinder but jump to 0x8000
 	call load_sector
 	mov byte [head], 1
 	mov word [sec_buff], 0xA200
 	call load_sector
-	mov byte [cylinder], 1 
+	mov byte [cylinder], 1
 	mov byte [head], 0
 	mov word [sec_buff], 0xC600
 	call load_sector

src/boot/bios-novideo.asm

@@ -1,6 +1,6 @@
 ; =============================================================================
 ; Pure64 MBR -- a 64-bit OS/software loader written in Assembly for x86-64 systems
-; Copyright (C) 2008-2025 Return Infinity -- see LICENSE.TXT
+; Copyright (C) 2008-2026 Return Infinity -- see LICENSE.TXT
 ;
 ; This Master Boot Record will load Pure64 from a pre-defined location on the
 ; hard drive without making use of the file system.

src/boot/bios-pxe.asm

@@ -1,6 +1,6 @@
 ; =============================================================================
 ; Pure64 PXE Start -- a 64-bit OS/software loader written in Assembly for x86-64 systems
-; Copyright (C) 2008-2025 Return Infinity -- see LICENSE.TXT
+; Copyright (C) 2008-2026 Return Infinity -- see LICENSE.TXT
 ;
 ; This is a stub file for loading Pure64 and a kernel/software package via PXE.
 ;

src/boot/bios.asm

@@ -1,6 +1,6 @@
 ; =============================================================================
 ; Pure64 MBR -- a 64-bit OS/software loader written in Assembly for x86-64 systems
-; Copyright (C) 2008-2025 Return Infinity -- see LICENSE.TXT
+; Copyright (C) 2008-2026 Return Infinity -- see LICENSE.TXT
 ;
 ; This Master Boot Record will load Pure64 from a pre-defined location on the
 ; hard drive without making use of the file system.

src/boot/uefi.asm

@@ -1,6 +1,6 @@
 ; =============================================================================
 ; UEFI loader for Pure64
-; Copyright (C) 2008-2025 Return Infinity -- see LICENSE.TXT
+; Copyright (C) 2008-2026 Return Infinity -- see LICENSE.TXT
 ;
 ; Adapted from https://stackoverflow.com/questions/72947069/how-to-write-hello-world-efi-application-in-nasm
 ; and https://github.com/charlesap/nasm-uefi/blob/master/shoe-x64.asm

src/fdc/dma.asm

@@ -1,6 +1,6 @@
 ; =============================================================================
 ; DMA Driver
-; Copyright (C) 2008-2025 Return Infinity -- see LICENSE.TXT
+; Copyright (C) 2008-2026 Return Infinity -- see LICENSE.TXT
 ; Implemented by Isa Isoux -- https://github.com/isoux/BMFLFS
 
 ; The DMA controller performs data transfers:
@@ -31,7 +31,7 @@ DMA1_CHR_ADDR	EQU 0x81
 ; bl  = channel
 ; bh  = 1 = read, 0 = write
 ; esi = count
-dma_IO: 
+dma_IO:
 
 ; Examine whether it is writing or reading
 ; what_mode

src/fdc/fdc_64.asm

@@ -1,12 +1,12 @@
 ; =============================================================================
 ; Floppy Disk Driver
-; Copyright (C) 2008-2025 Return Infinity -- see LICENSE.TXT
+; Copyright (C) 2008-2026 Return Infinity -- see LICENSE.TXT
 ; Implemented by Isa Isoux -- https://github.com/isoux/BMFLFS
 
-; Here is a minimal simplified version intended only for reading whole floppy 
+; Here is a minimal simplified version intended only for reading whole floppy
 ; disk into memory or writing back image from memory to whole disk at once.
-; Errors are poorly handled due to the simplicity of the handling, one thing 
-; that can be easily noticed is that the disk is damaged and does not load 
+; Errors are poorly handled due to the simplicity of the handling, one thing
+; that can be easily noticed is that the disk is damaged and does not load
 ; completely.
 
 ; FDC - Floppy Disk Controler

src/init/acpi.asm

@@ -1,6 +1,6 @@
 ; =============================================================================
 ; Pure64 -- a 64-bit OS/software loader written in Assembly for x86-64 systems
-; Copyright (C) 2008-2025 Return Infinity -- see LICENSE.TXT
+; Copyright (C) 2008-2026 Return Infinity -- see LICENSE.TXT
 ;
 ; INIT ACPI
 ;

src/init/cpu.asm

@@ -1,6 +1,6 @@
 ; =============================================================================
 ; Pure64 -- a 64-bit OS/software loader written in Assembly for x86-64 systems
-; Copyright (C) 2008-2025 Return Infinity -- see LICENSE.TXT
+; Copyright (C) 2008-2026 Return Infinity -- see LICENSE.TXT
 ;
 ; INIT CPU - This code is called by all activated CPU cores in the system
 ; =============================================================================

src/init/serial.asm

@@ -1,6 +1,6 @@
 ; =============================================================================
 ; Pure64 -- a 64-bit OS/software loader written in Assembly for x86-64 systems
-; Copyright (C) 2008-2025 Return Infinity -- see LICENSE.TXT
+; Copyright (C) 2008-2026 Return Infinity -- see LICENSE.TXT
 ;
 ; INIT SERIAL - 115200 bps, 8N1 (8 data bits, no parity, and 1 stop bit)
 ; =============================================================================

src/init/smp.asm

@@ -1,6 +1,6 @@
 ; =============================================================================
 ; Pure64 -- a 64-bit OS/software loader written in Assembly for x86-64 systems
-; Copyright (C) 2008-2025 Return Infinity -- see LICENSE.TXT
+; Copyright (C) 2008-2026 Return Infinity -- see LICENSE.TXT
 ;
 ; INIT SMP
 ; =============================================================================

src/init/smp_ap.asm

@@ -1,6 +1,6 @@
 ; =============================================================================
 ; Pure64 -- a 64-bit OS/software loader written in Assembly for x86-64 systems
-; Copyright (C) 2008-2025 Return Infinity -- see LICENSE.TXT
+; Copyright (C) 2008-2026 Return Infinity -- see LICENSE.TXT
 ;
 ; INIT SMP AP
 ; =============================================================================

src/init/timer.asm

@@ -1,6 +1,6 @@
 ; =============================================================================
 ; Pure64 -- a 64-bit OS/software loader written in Assembly for x86-64 systems
-; Copyright (C) 2008-2025 Return Infinity -- see LICENSE.TXT
+; Copyright (C) 2008-2026 Return Infinity -- see LICENSE.TXT
 ;
 ; INIT TIMER
 ; =============================================================================

src/interrupt.asm

@@ -1,6 +1,6 @@
 ; =============================================================================
 ; Pure64 -- a 64-bit OS/software loader written in Assembly for x86-64 systems
-; Copyright (C) 2008-2025 Return Infinity -- see LICENSE.TXT
+; Copyright (C) 2008-2026 Return Infinity -- see LICENSE.TXT
 ;
 ; Interrupts
 ; =============================================================================

src/pure64.asm

@@ -1,6 +1,6 @@
 ; =============================================================================
 ; Pure64 -- a 64-bit OS/software loader written in Assembly for x86-64 systems
-; Copyright (C) 2008-2025 Return Infinity -- see LICENSE.TXT
+; Copyright (C) 2008-2026 Return Infinity -- see LICENSE.TXT
 ;
 ; The first stage loader is required to gather information about the system
 ; while the BIOS or UEFI is still available and load the Pure64 binary to
@@ -68,6 +68,12 @@ bootmode:
 	mov [0x5FFC], edx
 	mov [0x5FF8], eax
 
+	; Set up the Page Attribute Table (PAT). This will happen twice for the BSP.
+	mov edx, 0x00000105		; PA7 UC (00), PA6 UC (00), PA5 WC (01), PA4 WP (05)
+	mov eax, 0x00070406		; PA3 UC (00), PA2 UC- (07), PA1 WT (04), PA0 WB (06)
+	mov ecx, IA32_PAT
+	wrmsr
+
 	mov eax, 16			; Set the correct segment registers
 	mov ds, ax
 	mov es, ax
@@ -117,7 +123,7 @@ bootmode:
 	stosw				; BitsPerPixel
 %endif
 
-	; Clear memory for the Page Descriptor Entries (0x210000 - 0x25FFFF)
+	; Clear memory for the temporary Page Descriptor Entries (0x210000 - 0x25FFFF)
 	mov edi, 0x00210000
 	mov ecx, 320 * 1024 / 4
 	rep stosd			; Write 320KiB
@@ -168,6 +174,28 @@ pde_low_32:				; Create a 2 MiB page
 	cmp ecx, 2048
 	jne pde_low_32			; Create 2048 2 MiB page maps.
 
+%ifndef NOVIDEO
+; Set the Linear Frame Buffer memory to WC
+lfb_twc_2MB:
+	mov ecx, 4			; 4 2MiB pages - TODO only set the pages needed
+	mov edi, 0x00210000
+	mov eax, [0x00005F00]		; Base address of video memory
+	shr eax, 18
+	add edi, eax
+lfb_twc_2MB_nextpage:
+	mov eax, [edi]			; Load the 8-byte value
+	or ax, 0x1008			; Set bits 12 (PAT) and 3 (PWT)
+	and ax, 0xFFEF			; Clear bit 4 (PCD)
+	mov [edi], eax			; Write it back
+	add edi, 8
+	sub ecx, 1
+	jnz lfb_twc_2MB_nextpage
+lfb_twc_end:
+	mov eax, cr3			; Flush TLB
+	mov cr3, eax
+	wbinvd				; Flush Cache
+%endif
+
 ; Load the GDT
 	lgdt [tGDTR64]
 

src/sysvar.asm

@@ -1,6 +1,6 @@
 ; =============================================================================
 ; Pure64 -- a 64-bit OS/software loader written in Assembly for x86-64 systems
-; Copyright (C) 2008-2025 Return Infinity -- see LICENSE.TXT
+; Copyright (C) 2008-2026 Return Infinity -- see LICENSE.TXT
 ;
 ; System Variables
 ; =============================================================================