INDEX BY SUBJECT escape key flag 674 Operating system handler routines 63197 - character set 57344 - 65535 58367 handler vector 58400 Floating Point 55296 - interrupts 16, 53774 57343 inverse toggle 694 handlers 58534 - option, select, start keys 53279 65535 shift key flag 702, 53769 ROM 55296 - start, stop flag 767 65535 status 76 vectors 58368 - synchronization 54282 58533 timer delay 555 Paddles Light pen see Pots horizontal value 564, 54284 Page zero vertical value 565, 54285 BASIC use 128 - 209 Line buffer 21, 22 bit map 690 - 693 Floating Point use 210 - 255 buffer 583 - 622 FMS registers 67 - 73 cursor 99 IOCB 32 - 47 logical line 83 RAM 0 - 255 margins 83 Peripherals plotting 112 - 122, controllers 54018, 126 54019 screen editor 107 interrupts 53744 tabs 201, 675 - ports 54016, 689 54017 Luminance PIA attract mode 77 - 79 ROM 54016 - Machine language 54271 page six 1536 - 1791 stick 54016, techniques 88 54017 Margins paddle (pot) triggers 54016, editing 83 54017 initialization 82, 83 ports 54016 - left 82 54019 right 83 Player/Missile Graphics scrolling 83 (PMG) Memory character base 54279 see RAM collision clear 53278 collision detection 53248 - Monitor 53263 handler routines 61667 - color registers 703 - 707 62435 disable, enable 559, 53277 Non-Maskable Inter- DMA 54272 rupts (NMI) fifth player 623, 53275 DLI 560, 561, graphic shape 53261 - 54286 53265 reset register 54287 horizontal movement 53248 service routines 59316 - horizontal position 53248 - 59715 53255 status 54287 location 54279 VBLANK 546 - 549, memory reservation 54279 54286 movement 53248 vectors 512, 513 multicolor 623, 53275