ccp: implement dir command

src/ccp.asm

@@ -11,6 +11,17 @@ inlen	equ 0x90
 
 banner	db "RDOS Console Command Processor",0x0A,0x0D,0x1A
 
+%include "print.inc"
+%include "scan.inc"
+
+	; eat leftover spaces
+	; IN	ds:si	ptr
+eatws	jmp .l01
+.l02	inc si
+.l01	cmp byte [si], 0x20
+	je .l02
+	ret
+
 prompt	mov ax, cs
 	mov ds, ax
 	mov es, ax
@@ -36,6 +47,8 @@ prompt	mov ax, cs
 	mov dx, inbuf
 	mov ah, 10
 	int 0x21
+	cmp byte [inbuf+1], 0
+	je prompt
 
 	; parse inbuf into comfcb, buf, fcb1 and fcb2
 	; takes no arguments
@@ -65,26 +78,89 @@ parse	mov si, inbuf+2
 	mov di, fcb2
 	call lodfn
 	; dump out everything parsed for me to see
-	mov si, comfcb
-	call dump
-	mov si, fcb1
-	call dump
-	mov si, fcb2
-	call dump
-	mov si, buf
-	call dump
+	;mov si, comfcb
+	;call dump
+	;mov si, fcb1
+	;call dump
+	;mov si, fcb2
+	;call dump
+	;mov si, buf
+	;call dump
+	call exec
+	jmp prompt
+
+	; execute, prog in comfcb, args in buf
+exec	mov bx, ctab
+	jmp .l02
+.l01	add bx, 10
+	cmp byte [bx], 0
+	je .ret
+.l02	mov si, comfcb+1
+	mov di, bx
+	mov cx, 4
+	repe cmpsw
+	jne .l01
+	jmp [bx+8]
+.ret	mov dx, enoent
+	mov ah, 9
+	int 0x21
 	ret
 
-	; eat leftover spaces
-	; IN	ds:si	ptr
-eatws	jmp .l01
-.l02	inc si
-.l01	cmp byte [si], 0x20
-	je .l02
-	ret
+enoent	db "no command", 0x0A, 0x0D, "$"
 
-%include "print.inc"
-%include "scan.inc"
+ctab	db "DIR     "
+	dw c_dir
+	db 0
+
+
+
+c_dir	mov di, fcb1+1
+	cmp byte [di], 0x20
+	jne .l01
+	mov ax, '??'
+	mov cx, 4
+	rep stosw
+.l01	mov di, fcb1+9
+	cmp byte [di], 0x20
+	jne .l02
+	mov al, '?'
+	mov cx, 3
+	rep stosb
+.l02	mov dx, buf
+	mov ah, 0x1A
+	int 0x21
+	mov ah, 0x11
+.loop	mov dx, fcb1
+	int 0x21
+	test al, al
+	jnz .ret
+	mov dl, [buf]
+	add dl, 0x40
+	mov ah, 2
+	int 0x21
+	mov dl, ':'
+	int 0x21
+	mov cx, 8
+	mov si, buf+1
+.l03	lodsb
+	mov dl, al
+	int 0x21
+	loop .l03
+	mov dl, ' '
+	int 0x21
+	mov cx, 3
+	mov si, buf+9
+.l04	lodsb
+	mov dl, al
+	int 0x21
+	loop .l04
+	mov dl, 0x0A
+	int 0x21
+	mov dl, 0x0D
+	int 0x21
+	mov ah, 0x12
+	jmp .loop
+.ret	ret
 
 section .bss