[Oberon] Negative integer literals in Oberon

[Skulski, Wojciech]

Joerg:

> Could somebody give me a good example, where INTEGERs need a hex notation?

How about this? These INTEGERS represent addresses. Are addresses integers? I believe they are. The memory is a collection of addresses with consecutive numbers expressed with integers. So it is a relevant example.

(* Memory map; PO.System page 104 *)
STACKSIZE* = 8000H;      (* 32 kB. Was hardwired in Kernel.Init *)
STACKORG*  = 80000H;   (* stackOrg = 524,288; half a megabyte. *)
HEAPORG*   = STACKORG; (* heapOrg = stackOrg *)
FSoffset*  = STACKORG;     (* Not clear what it is *)
MEMLIM*    = 0E7EF0H;     (* 1 MB minus 98,575 bytes of VRAM at the end*)
VRAMORG*   = 0E7F00H;   (* start of memory-mapped display frame*)
VRAMSIZE*  = 1024*768 DIV 8;     (* 1024 x 768 pixel, monocolor display frame*)