6502 microprocessor 33
6502 vectors 44
a/d conversion 11
absolute addressing 63
absolute indexed addressing 66
accumulator 37
active levels 221
address bus 19
address coordinates 179
address decoding 23
address modification 38
address pointer 69
address register 45
addressing modes 62
ALU 47
application note 1, 22
arithmetic instructions 56
array variable
storage 114
ASIA 11
assembler 77
bank swltching 6
benchmarks 33
binary 215
binary coded decimal 217
branch labels 79
bubble 21
bubble sorts 114
buffer registers 233
calling 84
chip enable 19
clearing registers 57
clock 20
code efficiency 218
comparisons 61
composite video 5
conditional assembly 89
control lines 19
current page 28
data bus 19
data transfers 37
decode matrix 47
decoders 231
demultiplexers 231
direct screen 173
direction register 197
double-byte working 101
encoders 232
execute phase 44
external interrupts 212
fetch phase 44
fixed-length records 144
fixed locations 82
flip flops 223
floating point array storage 139
floating point merge sorts 138
forward branching 85
four-byte addition 103
four-byte subtraction 105
Fred address 16
generations 2
glossary 249
hardware scrolling 185
hex op-code 54
hexadecimal 2 16
immediate addressing 62
implied addressing 62
indexed addressing 66
indexed indirect addressing 72
indexing 38
indirect addressing 68
indirect indexed addressing 70
indirection operators 97
instruction register 44
instruction set 235
instructions 52
integer array addition 108
internal interrupts 210
interrupt 8
interrupt enable register 204
interrupt flag register 202
interrupt mask 9
Jim 28
LEDs 227
logic gates 219
logic levels 218
lsi 2
macros 87
memory mapping 14
merge sorts 126
microprograms 45
mnemonic op-codes 78
moving objects 169
multi-byte counting 106
multi-colour MOBs 177
multifield sorts 143
multiplexers 232
nibble 173
one's complement 59
operand 52
operand variables 78
operating system calls 234
operation symbols 54
opto-isolator 228
page boundary 29
paging register 30
parameter passing 90
pixel 173
power pack 5
process status register 39
program counter 42
PROM programmers 7
pseudo-variables 82
read/write 20
refreshing 34
relative addressing 65
relays 227
remarks 80
reset fine 20
Reverse Polish 37
ROM chips 6
RS423 10
saving code 98
schmitt trigger 229
screen output 5
second processor 3
Sheila addresses 14
shift registers 232
sideways scrolling 185
Silicon Valley 2
software interrupt 48
sorting times 154
stack pointer 41
static RAM 35
storing code 80
string bubble sort 120
switch bounce 226
timers 205
tristate 225
TTL 2
two's complement 59
two dimensronal sorts 148
UHF 5
UHF modulator 5
up/down counting 57
user port 7
VDU codes 162
vectors 158
vertical scrolling 190
VIA 7
VIA registers 195
wired-OR 225
word length 3
zero-page add ressing 64