Name: Rain
Author: Richard Steventon

--> S/SX/G/GX

Category: Display. Fills the display with a full-screen grob by
	"raining" it down one line at a time, very quickly.

Abstract: graphics utility
	error checking implemented in SASM for the hell of it!

Entry Conditions: Graphic 131 x 64

Exit Conditions: -   ( object always popped )

Stack Levels: 1

Error Exits: =argtypeerr, =argvalerr via GOVLNG =Errjmp

Calls:	SAVPTR		: saves RPL registers
	GETPTR		: Restores RPL registors
	GETPTRLOOP	: Restores RPL registors & continues RPL
	D0->Row1		: Get address of first nib of HARDBUFF into D0
	Errjmp		: Error exit with error code given by A.A

Uses: A.A,  B.B,  C.W,	D.B,  RSTK (2 levels max),  D0,  D1


Module History : written using ED and Jazz v1.0

Author		: R. H. Steventon
Date Written	: 23 October 1994