] RSX-llM/S - RSX-liM-PLUS Software Dispatch, January 1981
š

RSX-11M V3.2 Seg 5.7.5.3 PF

MISC SYSTEM TASKS
RMD 1 of 3

ar 3 A WAY TO REDUCE OVERHEAD IN RMD (SPR 11-89928z AG)

PRORLEM
STATEMENT

RMD uodates the screen 1 line at a time, This means tnat it can take

up to 24 0I0"s to update, Most of tnese 0I0's are relatively small,
makina tne overhead to update the screen excessive,

RESPONSE

Tne following patch, when arnplied to module RMDRIV will make RMD  £ili
a 256 buffer before  issuing a  0IO0, This means that, after tne
original screen paint, tne screen can almost always be updated with a
single MOTO, This has resulted in a significant reduction in system

overhead,

OUSRMDRIV,MAC?2/AU/eBFEZIN3(14,10)RMDRIV,MAC31
N

»32,2
» IDENT /1,2/
»9,9
3 VERSION% 1,2
»11
3 MODIFICATIONS:
3
3 AG046 CHANGE TO SINGLE LONG OIO
3
%
»33,33,/3AG046/

»MCALLU  OTOW$,DIRS$,«SIGSS,4TSE$S
»49, »4/5AG046/ ih : a

».MACRO PUTC CHAR,?A 3 PUT CHARACTER TO OUTPUT BUFFER
Ce R5, SBUFFER4RUFL«1
BLT A
CALL OUTPUT š
A3 MOVB CHAR, (R5)» 9 a:
»ENDM V OUKUTU

23 RE