Problems with bootloader and small program

[Jerkko]

I've done a small bootloader and i'm trying to load small program from floppy and execute it, but I can't get it work.

This is a part of my bootloader's code (boot.bin)

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read:
mov   ax,1000h
mov   es,ax
mov   bx,0

mov   ah,2   ;load to es:bx
mov   al,1   ;load 1 sector
mov   ch,1   ;cylinder 0
mov   cl,2   ;sector 2
mov   dh,0   ;head 0
mov   dl,0   ;drive A
int   13h
jc    read   ;error ->read
jmp   1000h:0000

and then the small program (proc.bin)

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[BITS 16]
[ORG 1000h:0]

mov ax, 0000h
mov ds, ax 
mov ah, 0Eh
mov al, 'a'
mov bh, 0
mov bl, 07h
mov cx, 10
int 10h
hang:
jmp hang
times 512-($-$$) db 0

then I try to do something like this:

partcopy.exe C:\nasm\boot.bin 0 200 -f0
partcopy.exe C:\nasm\proc.bin 0 200 -f0 200
partcopy.exe -f0 0 400 1.44

What am I doing wrong? I looked bochs's log and there was these lines

00002397930i[FDD ] read() on floppy image returns 0
00002431656p[CPU ] >>PANIC<< prefetch: RIP > CS.limit
00002431656i[SYS ] Last time is 1112372637
00002431656i[CPU ] real mode

Does this mean the CS value is too big or something like that? Or can't it read the floppy?

P.S I'm sorry about those long code examples.
P.S.S I'm noobie

[AR]

Well "read() on floppy image returns 0" followed by a PANIC would make it seem that it can't read the floppy

Your Bochs description file would also be useful, someone else made the mistake of having:

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floppya: 1_44=a.img, status=inserted

When it should have read

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floppya: 1_44=a:, status=inserted

It also looks like your using a 64bit build (RIP=64bit) if you don't realise.

[Jerkko]

I have got that problem solved. There was one little mistake.
This line:

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mov ch,1 ; cylinder 0

should be like this:

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mov ch,0 ; cylinder 0

One bit on wrong place and it doesn't work.