;NULU patch file for Spectrum +3
;Author:    F.T. Gowen
;Version:   1.0
;Last Mod.: 12/01/1996 - FTG
CR       EQU   0DH
ESC      EQU   1BH
FF       EQU   0CH
LF       EQU   0AH
TRUE     EQU   01H
FALSE    EQU   00H

BDOS     EQU   0005H

         ORG   194H
NCFULL:  DEFB  80       ;Max no. chars. per line
NCVIS:   DEFB  51       ;Visible no. chars. per line
         ORG   198H
NFO:     DEFB  7        ;No. of open files (>=4)
NRT:     DEFW  0010H    ;No. of rel. tasks (>=000DH)
NDRIVES: DEFB  3        ;No. of drives [A-->C]
NUSERS:  DEFB  16       ;No. of user areas [0-->15]
         ORG   1CDH
BDOSADDR:DEFW  BDOS
         ORG   24DH
NULURO:  DEFB  FALSE    ;NULU read/only flag
NULUAX:  DEFB  FALSE    ;NULU Auto eXit like LU
BROFF:   DEFB  TRUE     ;Start with BRief mode OFF
CHNON:   DEFB  TRUE     ;CHaiNing ON
NCFLVL:  DEFB  3        ;NCF file nest LeVeL (=NFO-4)
INITSEQ: DEFB  '-Y *.LBR -O',0
         ; INITial SEQuence of commands when NULU is
         ;loaded. 39 chars. + 0 terminator allowed
         ORG   27DH
REVON:   DEFS  1        ;ID byte
         DEFB  2        ;Length of
         DEFB  ESC,'p'  ;REVerse video ON sequence
         DEFB  0,0,0    ;5 bytes allowed
REVOFF:  DEFS  1        ;ID byte
         DEFB  2        ;Length of
         DEFB  ESC,'q'  ;REVerse video OFF sequence
         DEFB  0,0,0    ;5 bytes allowed
ULINON:  DEFS  1        ;ID byte
         DEFB  2        ;Length of
         DEFB  ESC,'r'  ;UnderLine ON sequence
         DEFB  0,0,0    ;5 bytes allowed
ULINOFF: DEFS  1        ;ID byte
         DEFB  2        ;Length of
         DEFB  ESC,'u'  ;Underline OFF sequence
         DEFB  0,0,0    ;5 bytes allowed
CLRSCRN: DEFS  1        ;ID byte
         DEFB  4        ;Length of
         DEFB  ESC,'H',ESC,'E'
                        ;CLeaR SCReeN sequence
         DEFB  0        ;5 bytes allowed
         ORG   2A0H
PRTPL:   DEFB  60       ;PRinTer Page Length
         ORG   2A2H
INITP:   DEFS  1        ;ID byte
         DEFB  3        ;Length of
         DEFB  CR,LF,FF ;Printer INITialisation sequence
         DEFB  0,0      ;5 bytes allowed
PATCHEND:
         END