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Sinclair ZX81 User Manual

Sinclair ZX81
92 pages
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90 not used 5A ld e,d bit 3,d adc hl,de
91 not used 5B ld e,e bit 3,e ld de,(NN)
92 not used 5C ld e,h bit 3,h
93 not used 5D ld e,l bit 3,l
94 not used 5E ld e,(hl) bit 3,(hl) im 2
95 not used 5F ld e,a bit 3,a ld a,r
96 not used 60 ld h,b bit 4,b in h,(c)
97 not used 61 ld h,c bit 4,c out (c),h
98 not used 62 ld h,d bit 4,d sbc hl,hl
99 not used 63 ld h,e bit 4,e ld (NN),hl
100 not used 64 ld h,h bit 4,h
101 not used 65 ld h,l bit 4,l
102 not used 66 ld h,(hl) bit 4,(hl)
103 not used 67 ld h,a bit 4,a rrd
104 not used 68 ld l,b bit 5,b in l,(c)
105 not used 69 ld l,c bit 5,c out (c),l
106 not used 6A ld l,d bit 5,d adc hl,hl
107 not used 6B ld l,e bit 5,e ld de.(NN)
108 not used 6C ld l,h bit 5,h
109 not used 6D ld l,l bit 5,l
110 not used 6E ld l,(hl) bit 5,(hl)
111 not used 6F ld l,a bit 5,a rld
112 cursor up 70 ld (hl),b bit 6,b
113 cursor down 71 ld (hl),c bit 6,c
114 cursor left 72 ld (hl),d bit 6,d sbc hl,sp
115 cursor right 73 ld (hl),e bit 6,e ld (NN),sp
116
GRAPHICS
74 ld (hl),h bit 6,h
117
EDIT
75 ld (hl),l bit 6,l
118
NEWLINE
76 halt bit 6,(hl)
119
RUBOUT
77 ld (hl),a bit 6,a
120 / mode
78 ld a,b bit 7,b in a,(c)
121
FUNCTION
79 ld a,c bit 7,c out (c),a
122 not used 7A ld a,d bit 7,d adc hl,sp
123 not used 7B ld a,e bit 7,e ld sp,(NN)
124 not used 7C ld a,h bit 7,h
125 not used 7D ld a,l bit 7,l
126 number 7E la d,(hl) bit 7,(hl)
127 cursor 7F ld a,a bit 7,a
128
80 add a,b res 0,b
129 81 add a,c res 0,c
130 82 add a,d res 0,d
131 83 add a,e res 0,e
132 84 add a,h res 0,h
133 85 add a,l res 0,l
134 86 add a,(hl) res 0,(hl)
135 87 add a,a res 0,a
136 88 add a,b res 1,b
137 89 add a,c res 1,c
138
8A add a,d res 1,d

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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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