rdos/boot/kernel.asm

		cpu 8086
		org 0x7C00

%include	"inc/bpb.asm"
%include	"inc/mbr.asm"
%include	"inc/fcb.asm"
%include	"inc/dpt.asm"

		; kernel stack size in words
%define		stacksize 512

init:		cli
		xor ax, ax
		mov ds, ax
		mov es, ax
		mov ss, ax
		mov sp, ( stack+stacksize )

print_banner:	mov si, banner
		mov ah, 0x0e
		xor bx, bx
.loop:		lodsb
		int 0x10
		cmp al, 0x0D
		jnz .loop

		cmp dl, 0x80
		jc .k
		sub dl, (0x80-2)
.k:		mov [defdrv], dl

		call logdrv.force

		xor ax, ax
		xor dx, dx
		call maprd

		inc word [dskbuf+0x82]

		call dirty
		call flush

hlt:		hlt
		jmp hlt

%include	"kernel/far.asm"
%include	"kernel/fcb.asm"
%include        "kernel/drive.asm"

section .data

%defstr VERSIONSTR VERSION
banner:		db "RDOS ", VERSIONSTR, 0x0A, 0x0D

testfcb:	db 0
		db "HELLO   ", "COM"
		times 30 db 0

section .bss

stack:		resb stacksize
Improve ordering of binary data in kernel 2020-07-04 10:35:38 +02:00			`cpu 8086`
Fuck up the kernel, i have other ideas now 2020-09-15 21:44:32 +02:00			`org 0x7C00`
Implement some PoC of reading from disk 2020-04-15 00:17:58 +02:00
Improve ordering of binary data in kernel 2020-07-04 10:35:38 +02:00			`%include "inc/bpb.asm"`
Fuck up the kernel, i have other ideas now 2020-09-15 21:44:32 +02:00			`%include "inc/mbr.asm"`
Build drive selection logic for FCBs 2020-10-13 22:10:23 +02:00			`%include "inc/fcb.asm"`
Protypical implementation of DPT copying 2020-10-25 00:50:23 +02:00			`%include "inc/dpt.asm"`
Implement some PoC of reading from disk 2020-04-15 00:17:58 +02:00
Fuck up the kernel, i have other ideas now 2020-09-15 21:44:32 +02:00			`; kernel stack size in words`
			`%define stacksize 512`
kernel: First steps of calculating drive tab data from BPB 2020-08-31 22:11:05 +02:00
Improve ordering of binary data in kernel 2020-07-04 10:35:38 +02:00			`init: cli`
			`xor ax, ax`
			`mov ds, ax`
			`mov es, ax`
			`mov ss, ax`
			`mov sp, ( stack+stacksize )`
Implement whacky first version for 25h disk read 2020-04-26 23:14:34 +02:00
boot/kernel: print banner 2020-09-27 17:45:19 +02:00			`print_banner: mov si, banner`
			`mov ah, 0x0e`
			`xor bx, bx`
			`.loop: lodsb`
			`int 0x10`
			`cmp al, 0x0D`
			`jnz .loop`
kernel: implement diskio using drive table 2020-08-27 22:52:16 +02:00
Build drive selection logic for FCBs 2020-10-13 22:10:23 +02:00			`cmp dl, 0x80`
			`jc .k`
			`sub dl, (0x80-2)`
			`.k: mov [defdrv], dl`

Make logging in drive a no-op if drive already logged in 2020-12-17 01:41:53 +01:00			`call logdrv.force`
Implement map-like sector access for floppy drives 2020-12-16 00:29:35 +01:00
			`xor ax, ax`
			`xor dx, dx`
			`call maprd`

			`inc word [dskbuf+0x82]`

			`call dirty`
			`call flush`
Lay out skeletons for FCB handling 2020-10-11 23:33:01 +02:00
Fuck up the kernel, i have other ideas now 2020-09-15 21:44:32 +02:00			`hlt: hlt`
			`jmp hlt`
Implement int 29h: Fast console output 2020-04-20 19:13:06 +02:00
Protypical implementation of DPT copying 2020-10-25 00:50:23 +02:00			`%include "kernel/far.asm"`
Build drive selection logic for FCBs 2020-10-13 22:10:23 +02:00			`%include "kernel/fcb.asm"`
			`%include "kernel/drive.asm"`

			`section .data`

Lay out skeletons for FCB handling 2020-10-11 23:33:01 +02:00			`%defstr VERSIONSTR VERSION`
			`banner: db "RDOS ", VERSIONSTR, 0x0A, 0x0D`
Load kernel from reserved sectors in fatfs 2020-09-17 07:57:46 +02:00
Build drive selection logic for FCBs 2020-10-13 22:10:23 +02:00			`testfcb: db 0`
			`db "HELLO ", "COM"`
			`times 30 db 0`
Load kernel from reserved sectors in fatfs 2020-09-17 07:57:46 +02:00
Place variables into area after binary 2020-04-23 21:36:20 +02:00			`section .bss`
Fuck up the kernel, i have other ideas now 2020-09-15 21:44:32 +02:00
			`stack: resb stacksize`