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ZX Spectrum +2A/2B, +3/3B edge connector: Difference between revisions
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ZX Spectrum +2A/2B, +3/3B edge connector (view source)
Revision as of 22:25, 3 May 2015
, 3 May 2015recat
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{{Template:Spectrum edge connector|A15|A13|D7|[[#ROM disable pins|{{overline|OE}}]]|[[#Key Slot|SLOT]]|D0|D1|D2|D6|D5|D3|D4|{{overline|INT}}|{{overline|NMI}}|{{overline|HALT}}|{{overline|MREQ}}|{{overline|IORQ}}|{{overline|RD}}|{{overline|WR}}|[[#Power|NC]]|{{overline|WAIT}}|[[#Power|+12{{small|V}}]]|[[#Power|−12{{small|V}}]]|{{overline|M1}}|{{overline|RFS}}|A8|A10|[[#RESET|RESET]]|A14|A12|[[#Power|+5{{small|V}}]]|[[#Power|NC]]|[[#Key Slot|SLOT]]|0{{small|V}}|0{{small|V}}|[[#CPU Clock|CKEXT]]|A0|A1|A2|A3|NC|0{{small|V}}|[[#ROM disable pins|{{overline|OE}}]]|[[#Disc Controller Signals|{{overline|DRD}}]]|[[#Disc Controller Signals|{{overline|DWR}}]]|[[#Disc Controller Signals|{{overline|MTR}}]]|{{overline|BUSRQ}}|{{overline|RESET}}|A7|A6|A5|A4|[[#ROM disable pins|NC]]|{{overline|BUSACK}}|A9|A11}} | {{Template:Spectrum edge connector|A15|A13|D7|[[#ROM disable pins|{{overline|OE}}]]|[[#Key Slot|SLOT]]|D0|D1|D2|D6|D5|D3|D4|{{overline|INT}}|{{overline|NMI}}|{{overline|HALT}}|{{overline|MREQ}}|{{overline|IORQ}}|{{overline|RD}}|{{overline|WR}}|[[#Power|NC]]|{{overline|WAIT}}|[[#Power|+12{{small|V}}]]|[[#Power|−12{{small|V}}]]|{{overline|M1}}|{{overline|RFS}}|A8|A10|[[#RESET|RESET]]|A14|A12|[[#Power|+5{{small|V}}]]|[[#Power|NC]]|[[#Key Slot|SLOT]]|0{{small|V}}|0{{small|V}}|[[#CPU Clock|CKEXT]]|A0|A1|A2|A3|NC|0{{small|V}}|[[#ROM disable pins|{{overline|OE}}]]|[[#Disc Controller Signals|{{overline|DRD}}]]|[[#Disc Controller Signals|{{overline|DWR}}]]|[[#Disc Controller Signals|{{overline|MTR}}]]|{{overline|BUSRQ}}|{{overline|RESET}}|A7|A6|A5|A4|[[#ROM disable pins|NC]]|{{overline|BUSACK}}|A9|A11}} | ||
<!-- edge connector table ends --> | <!-- edge connector table ends --> | ||
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====RESET==== | ====RESET==== | ||
The RESET signal is an inverted version of the {{overline|RESET}} signal, and is produced by one of the inverters in IC15. The purpose of this signal is unclear since any peripheral could derive it by inverting the {{overline|RESET}} line itself. In the +3 it is connected via a 10k resistor (R76) to the floppy drive select line. This however seems to be an error in the circuit design though it has no adverse effects. | The RESET signal is an inverted version of the {{overline|RESET}} signal, and is produced by one of the inverters in IC15. The purpose of this signal is unclear since any peripheral could derive it by inverting the {{overline|RESET}} line itself. In the +3 it is connected via a 10k resistor (R76) to the floppy drive select line. This however seems to be an error in the circuit design though it has no adverse effects. | ||
[[Category:Edge connectors]] | |||
[[Category:Hardware]] | |||
[[Category:Spectrum]] | |||