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Sinclair ZX81 User Manual

Sinclair ZX81
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139 inverse " 8B adc a,e res 1,e
140 inverse £ 8C adc a,h res 1,h
141 inverse $ 8D adc a,l res 1,l
142 inverse : 8E adc a,(hl) res 1,(hl)
143 inverse ? 8F adc a,a res 1,a
144 inverse ( 90 sub b res 2,b
145 inverse ) 91 aub c res 2,c
146 inverse > 92 sub d res 2,d
147 inverse < 93 sub e res 2,e
148 inverse = 94 sub h res 2,h
149 inverse + 95 sub l res 2,l
150 inverse - 96 sub (hl) res 2,(hl)
151 inverse * 97 sub a res 2,a
152 inverse / 98 sbc a,b res 3,b
153 inverse ; 99 sbc a,c res 3,c
154 inverse , 9A sbc a,d res 3,d
155 inverse . 9B abc a,e res 3,e
156 inverse 0 9C abc a,h res 3,h
157 inverse 1 9D abc a,l res 3,l
158 inverse 2 9E abc a,(hl) res 3,(hl)
159 inverse 3 9F abc a,a res 3,a
160 inverse 4 A0 and b res 4,b ldi
161 inverse 5 A1 and c res 4,c cpi
162 inverse 6 A2 and d res 4,d ini
163 inverse 7 A3 and e res 4,e outi
164 inverse 8 A4 and h res 4,h
165 inverse 9 A5 and l res 4,l
166 inverse A A6 and (hl) res 4,(hl)
167 inverse B A7 and a res 4,a
168 inverse C A8 xor b res 5,b ldd
169 inverse D A9 xor c res 5,c cpd
170 inverse E AA xor d res 5,d ind
171 inverse F AB xor e res 5,e outd
172 inverse G AC xor h res 5,h
173 inverse H AD xor l res 5,l
174 inverse I AE xor (hl) res 5,(hl)
175 inverse J AF xor a res 5,a
176 inverse K B0 or b res 6,b ldir
177 inverse L B1 or c res 6,c cpir
178 inverse M B2 or d res 6,d inir
179 inverse N B3 or e res 6,e otir
180 inverse O B4 or h res 6,h
181 inverse P B5 or l res 6,l
182 inverse Q B6 or (hl) res 6,(hl)
183 inverse R B7 or a res 6,a
184 inverse S B8 cp b res 7,b lddr
185 inverse T B9 cp c res 7,c cpdr
186 inverse U BA cp d res 7,d indr
187 inverse V BB cp e res 7,e otdr

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Sinclair ZX81 Specifications

General IconGeneral
ProcessorZilog Z80A
Processor Speed3.25 MHz
ROM8 KB
InputMembrane keyboard
StorageCassette tape
Power Supply9V DC
Dimensions167 mm x 40 mm x 175 mm
Release Year1981
ManufacturerSinclair Research
Weight350 g
Operating SystemSinclair BASIC
RAM1 KB
PortsTV out, expansion port
DisplayTelevision (RF modulator output)

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