ZX Spectrum

ZX Spectrum I/O port functionality Filter ZX Spectrum I/O port functionality topics

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table started by pak21 for the ZX Spectrum Base
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x name x Port mask x Port value x Found on computers x Found on peripheral classes x Found on peripherals
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x 64 colour ULA data port 65,535 65,339     64 colour ULA
x 64 colour ULA register port 65,535 48,955     64 colour ULA
x +D CN 255 239     +D
DISCiPLE
x +D DR 255 251     +D
DISCiPLE
x +D memory control 255 231     +D
DISCiPLE
x +D printer 255 247     +D
DISCiPLE
x +D SEC 255 243     +D
DISCiPLE
x +D SR 255 227     +D
DISCiPLE
x +D TR 255 235     +D
DISCiPLE
x Betadisk DR 255 127     Beta disc interface
x Betadisk SEC 255 95     Beta disc interface
x Betadisk SP 255 255     Beta disc interface
x Betadisk SR 255 31     Beta disc interface
x Betadisk TR 255 63     Beta disc interface
x DivIDE control 255 227     DivIDE
x DivIDE I/O 227 163     DivIDE
x Fuller AY data 255 95     Fuller Box
x Fuller AY register select 255 63     Fuller Box
x Fuller joystick 255 127     Fuller Box
x Kempston joystick 224 0   Kempston joystick interface  
x Kempston Mouse buttons 289 1     Kempston Mouse Interface
x Kempston Mouse X position 1,313 257     Kempston Mouse Interface
x Kempston Mouse Y position 1,313 1,281     Kempston Mouse Interface
x SpeccyBoot control register 224 128     SpeccyBoot
x SpecDrum output 255 223     SpecDrum
x Spectranet control register 65,535 33,007     Spectranet
x Spectranet programmable trap 65,535 33,005     Spectranet
x Timex AY data 255 246 Timex Sinclair 2068    
x Timex AY register select 255 245 Timex Sinclair 2068    
x Timex DEC 255 255 Timex Computer 2048    
Timex Sinclair 2068
x Timex HSR 255 244 Timex Computer 2048    
Timex Sinclair 2068
x Timex ULA 255 254 Timex Computer 2048    
Timex Sinclair 2068
x ZX Interface 1 microdrive control 24 0     ZX Interface 1
x ZX Interface 1 network 24 16     ZX Interface 1
x ZX Interface 1 RS232 24 8     ZX Interface 1
x ZX Printer 4 0     ZX Printer
x ZX Spectrum +3 FDC read/write 61,442 12,288 ZX Spectrum +3    
x ZX Spectrum +3 FDC status 61,442 8,192 ZX Spectrum +3    
x ZX Spectrum +3 parallel printer 61,442 0 ZX Spectrum +3    
x ZX Spectrum +3 primary memory control 49,154 16,384 ZX Spectrum +3    
x ZX Spectrum +3 secondary memory control 61,442 4,096 ZX Spectrum +3    
x ZX Spectrum 128 AY data 49,154 32,768 ZX Spectrum 128   Melodik Interface
ZX Spectrum +3
x ZX Spectrum 128 AY register select 49,154 49,152 ZX Spectrum 128   Melodik Interface
ZX Spectrum +3
x ZX Spectrum 128 memory control 32,770 0 ZX Spectrum 128    
x ZX Spectrum ULA 1 0 ZX Spectrum    
ZX Spectrum 128
ZX Spectrum +3
x ZXATASP control port 927 927     ZXATASP
x ZXATASP port A 927 159     ZXATASP
x ZXATASP port B 927 415     ZXATASP
x ZXATASP port C 927 671     ZXATASP
x ZXCF IDE read/write 4,340 4,276     ZXCF
x ZXCF memory control 4,340 180     ZXCF
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