Orange-micro Interface The Grappler Manuel d'utilisateur télécharger pdf (Page 10)

FOR ADVANCED PROGRAMMERS:

MEMORY LOCATIONS USED BY THE GRAPPLER

The Grappler Interface uses those RAM locations set aside for

its particular slot and the slot scratchpad area common to all

slots. The ROM is turned on using the standard ROM expansion

protocol and resides in locations $C8ØØ to $CFFF. The entry

points and the various RAM variables are listed below (N=Slot

number):

Cold Entry = $CNØØ

Warm Entry = $CNØ2

Left Margin = $478 + $ØN

Right Margin = $678 + $ØN

Line Length = $578 + $ØN

Page Length = $5F8 + $ØN

Character Counter = $4F8 + $ØN

Line Counter = $6F8 + $ØN

Current Cmd. Char. = $778 + $ØN

Text Flags = $7F8 + $ØN

Text Flag Bit Representations: (Bit 7 - Output high order bit)

(Bit 6 - Video turned on)

(Bit 5 - LF after a CR)

(Bit 4 — Bell on)

—9—

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 18 19

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Orange-micro Interface The Grappler Manuel d'utilisateur Page 10