Combined boot and kernel modules into one

Makefile

@@ -5,18 +5,14 @@ TARGET := sentinel-65x-512K
 .PHONY: all
 all: build/$(TARGET).bin
 
-include config/boot.mk
 include config/kernel.mk
 
-build/$(TARGET).bin: build/boot.bin build/kernel.bin
+build/$(TARGET).bin: build/kernel.bin
 #Create an empty .bin file.
 	@dd if=/dev/zero of=$@ bs=1024 count=512
 
-# Add the boot module at offset 0x008000
-	@dd if=build/boot.bin of=$@ bs=1024 seek=32 conv=notrunc
-
-# Add the bios module at offset 0x008300
-	@dd if=build/kernel.bin of=$@ bs=1 seek=33536 conv=notrunc
+# Add the bios module at offset 0x000000
+	@dd if=build/kernel.bin of=$@ conv=notrunc
 
 .PHONY: clean
 clean:
@@ -32,5 +28,5 @@ clean:
 	\) -delete
 
 .PHONY: flash
-flash: $(TARGET).bin
+flash: build/$(TARGET).bin
 	$(MP) $(MPFLAGS) -w $<

config/boot.mk

@@ -1,10 +0,0 @@
-BOOT_SRC := $(wildcard src/boot/*.s)
-
-BOOT_OBJ := $(BOOT_SRC:.s=.o)
-
-BOOT_LDFLAGS := --list-file build/boot.lst
-
-build/boot.bin: $(BOOT_OBJ)
-	@echo "Linking $@..."
-	@$(LD) -o $@ config/boot.scm $(LDFLAGS) $(BOOT_LDFLAGS) $^
-	@mv build/boot.raw $@

config/boot.scm

@@ -1,36 +0,0 @@
-(define memories '(
-
-        (memory Code
-                (address (#x008000 . #x0080FF))
-                (section code)
-                (section cdata)
-                (section switch)
-        )
-
-        (memory Data
-                (address (#x008100 . #x0081FF))
-                (section near)
-                (section data)
-                (section znear)
-                (section zdata)
-        )
-
-        (memory Stack
-                (address (#x000100 . #x0001FF))
-                (section (stack #x00100))
-        )
-
-        (memory DirectPage
-                (address (#x000000 . #x0000FF))
-                (section
-                        (registers #x000004)
-                        (ztiny)
-                )
-        )
-
-        (block stack  (size #x100))               ; machine stack size
-
-        (base-address _DirectPageStart DirectPage 0)
-
-        (base-address _NearBaseAddress Data    0)
-))

config/kernel.scm

@@ -9,8 +9,15 @@
                 (section heap)
         )
 
+		(memory BOOT
+                (address (#x008000 . #x0082FF))
+				(scatter-to boot_rom)
+				(section boot)
+		)
+
         (memory ROM
-                (address (#xC08300 . #xC0FFFF))
+                (address (#xC00000 . #xC0FFFF))
+                (section (boot_rom #xC08000))
                 (section (code #xC08300))
                 (section farcode)
                 (section cdata)
@@ -41,5 +48,5 @@
 
         (base-address _DirectPageStart DirectPage 0)
 
-        (base-address _NearBaseAddress ROM    0)
+        (base-address _NearBaseAddress RAM #x00)
 ))

doc/syscalls.md

@@ -341,8 +341,8 @@ Arguments:
 
 Return value:
  - `C`: Status code
- - `X`: New file position (`31:16`)
- - `Y`: New file position (`15:0`)
+ - `X`: New file position (Low word)
+ - `Y`: New file position (High word)
 
 This call moves the internal file pointer, the position in the specified file from
 which data can be read or to which data can be written. On success, this call returns

include/kernel/file.h

@@ -44,8 +44,8 @@ struct file {
 		uint8_t minor_number;
 };
 
-// Using the pathname in the provided FCB, identify the device which manages
-// the file and have that device populate the FCB.
+// Using the pathname in the provided file stucture, identify the device which manages
+// the file and have that device populate the file structure.
 int file_init(char *pathname, struct file *file);
 
 int file_open(struct file *file);

src/kernel/boot.s

@@ -3,13 +3,11 @@
 //; boot/boot.s
 //;      Boot code for Sentinel 65X
 //;
-//; Copyright © 2024 Kyle J Cardoza <Kyle.Cardoza@icloud.com>
+//; Copyright <EFBFBD> 2024 Kyle J Cardoza <Kyle.Cardoza@icloud.com>
 
 #include "sentinel65x.h"
 
-              .section code, noreorder
-              .pubweak __program_root_section
-__program_root_section:
+	.section boot, noreorder
     .asciz "WDC"
 w65c265s_init:
     // Disable interrupts
@@ -49,5 +47,11 @@ delay_y
     lda #0b11110011
     sta PCS7
 
+	// Disable the on-CPU ROM
+	w65c265s_rom_off
+
+	// Disable the on-CPU RAM
+	w65c265s_sram_off
+
     // And we are booted enough to jump to high ROM.
     jmp long:0xC08300