Atari 800 Basic Reference Manual

LABEL
RADFLG
LPENH
LPENV
TXTROW
TXTCOL
COLORO
COLOR1
COLOR2
COLOR3
COLOR4
MEMTOP
MEMLO
CRSINH
CHACT
CHBAS
ATACHR
CH
FILDAT
DSPFLG
SSFLAG
HATABS
IOCB
CONSOL
• Future product.
I-2 Appendix
DECIMAL
LOCATION
251
564
565
656
657,658
708
709
710
711
712
741,742
743,744
752
755
756
763
764
765
766
767
794
832
1664-1791
53279
HEXADECIMAL
LOCATION COMMENTS AND DESCRIPTIONS
FB RAD/DEG flag (0 =radians, 6 =degrees).
234 Light Pen* Horizontal value.
235 Light Pen* Vertical value.
290 Cursor row (text window)
291,292 Cursor column (text window)
2C4 Color Register 0
2C5 Color Register 1
2C6 Color
Register 2
2C7 Color Register 3
2C8 Color
Register 4
2E5,2E6 OS top of available user memory pointer (LSB,
MSB)
2E7,2E8 OS low memory pointer
2FO Cursor inhibit (0 =cursor on, 1 =cursor off)
2F3 Character mode register (4 = vertical reflect; 2 =
normal; 1 =blank)
2F4 Character base register (defaults to 224) (224 = up-
per case, 226 = lower case characters)
2FB Last ATASCII character.
2FC Last keyboard key pressed; internal code; (255
clears character).
2FD Fill data for graphics Fill (XIO).
2FE Display Flag (1 = display control character).
2FF Start/Stop flag for paging (0 =normal listing) Set by
1£111.
31A Handler address table (3 bytes/handler)
340 I/0 control blocks (16 bytes!IOCB)
680-6FE
D01F
Spare RAM
Console switches (bit 2 = Option; bit 1 = Select; bit
0 = Start. POKE 53279, 0 before reading. 0 =
switch pressed.)

Atari 800 Specifications

General

Brand	Atari
Model	800
Category	Desktop
Language	English