ZX Spectrum edge connector: Difference between revisions

ZX Spectrum edge connector (view source)

29 bytes removed , 3 May 2015

recat

707

edits

@@ Line 1: / Line 1: @@
-[[Category:Edge Connectors]]
-[[Category:Hardware]]
-[[Category:Spectrum]]
-<!-- end of category list -->
 {{Template:Spectrum edge connector|A15|A13|D7|[[#ROM disable pins|{{overline|OE}}]]|SLOT|D0|D1|D2|D6|D5|D3|D4|{{overline|INT}}|{{overline|NMI}}|{{overline|HALT}}|{{overline|MREQ}}|{{overline|IORQ}}|{{overline|RD}}|{{overline|WR}}|NC|{{overline|WAIT}}|&#43;12v|NC|{{overline|M1}}|{{overline|RFSH}}|A8|A10|NC|A14|A12|&#43;5v|NC|SLOT|0v|0v|{{overline|CK}}|A0|A1|A2|A3|NC|0v|[[#ROM disable pins|{{overline|OE}}]]|NC|NC|NC|{{overline|BUSRQ}}|{{overline|RESET}}|A7|A6|A5|A4|[[#ROM disable pins|{{overline|ROMCS}}]]|{{overline|BUSACK}}|A9|A11}}
@@ Line 27: / Line 23: @@
 This means that when designing an interface which will page external memory in place of the Spectrum ROM a configuration jumper or similar is required to connect the ROM disable signal to lower pin 15 on a +3, but disconnect it on a 16/48k.
 Applying ROM paging signals to the 16/48k composite out pin does no permanent damage, but causes burst of patterning on the display.
+[[Category:Edge connectors]]
+[[Category:Hardware]]
+[[Category:Spectrum]]