Remove LISP attempts

This commit is contained in:
Nero 2019-05-02 20:14:42 +00:00
parent 0622188353
commit 4631808a63
4 changed files with 0 additions and 124 deletions

View File

@ -1,32 +0,0 @@
; All ptrs in ds segment, pointing to a node as returned by malloc
; in ax ptr car
; bx ptr cdr
; out di ptr con
cons:
push cx ; length for malloc
push dx
mov cx,4
mov dl,0x01 ; type for cons
call malloc
pop dx
pop cx
mov word [di+0x04],ax
mov word [di+0x06],bx
ret
; in ax ptr con
; out di ptr car
car:
mov si,ax
; TODO: type check
mov di,[si+0x04]
ret
; in ax ptr con
; out di ptr cdr
cdr:
mov si,ax
; TODO: type check
mov di,[si+0x06]
ret

View File

@ -1,58 +0,0 @@
verbose_malloc:
call malloc
push si ; both backup and input value for kprintf
mov si,.fmt
push di
call kprintf
pop di
pop si
ret
.fmt:
db "malloc %X", 0
; Allocates memory on the kernel heap
; Strategy: smallest fit
; in cx size in bytes
; dl node type
; out ds:di pointer
;
; Header:
; word ptr to next item (this implies its size)
; byte 00 = free, >0 used (refcount)
; byte high-level type
malloc:
push ax
push bx
mov di,heap
add cx, 0x04 ; header length
jmp .check
.next:
add di,[di]
.check:
mov ax,[di]
test ax,0xFFFF
jz .append ; we are on last entry
cmp byte [di+2],0x00
jne .next ; entry is in use
sub ax,cx
je .reuse ; entry has exact length
jc .next ; entry too short
jmp .next ; we'd have to split, not implemented yet
.reuse: ; exact length
mov byte [di+2],0xFF
jmp .end
.append: ; append to last item
mov word [di], cx
mov byte [di+2], 0x00
mov byte [di+3], dl
push di
add word di, [di]
mov byte [di],0x0000
pop di
.end:
pop bx
pop ax
ret
; Deallocates memory on the kernel heap
free:

View File

@ -1,9 +0,0 @@
; Create a integer atom from a string describing said integer
; in ds:si pointer to function arguments
; ds:di pointer to integer atom
int:
sub sp, 0x30
mov bp, sp ; buffer for integer
add sp, 0x30
ret

View File

@ -1,25 +0,0 @@
; dump contents of a node to screen
; in si
print:
push si ; byte iterator
push cx ; position of next item
push ax ; al is byte value
mov word cx, [si] ; fetch position of next item
cmp cx, 0x40
jng .loop
mov cx, 0x40
.loop:
lodsb
call kprint8
mov al, 0x20
call kputc
loopnz .loop
mov al, 0x0A
call kputc
mov al, 0x0D
call kputc
pop ax
pop cx
pop si
ret