Difference between revisions of "Printer Port"
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(→KC Compact Printer Port) |
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The Printer Port in the [[KC Compact]] is fully compatible with the CPCs Printer Port, and includes some additional features: | The Printer Port in the [[KC Compact]] is fully compatible with the CPCs Printer Port, and includes some additional features: | ||
| − | * Port EFxxh is CIO Port A, by default configured as Output, with inverted polarity on bit7 (same as on CPC) | + | * Port EFxxh is CIO Port A, by default configured as Output, with inverted polarity on bit7 (same as on CPC). However, CIO Port A could be reprogrammed by software (for example: making it an Input, or disabling the bit7 inversion) |
| − | + | ||
* The 8th Printer bit connects to Bit5 of PIO Port C (same as the Happy Computer [[8bit Printer Ports|8bit Printer Port]] mod) | * The 8th Printer bit connects to Bit5 of PIO Port C (same as the Happy Computer [[8bit Printer Ports|8bit Printer Port]] mod) | ||
* The "TEST" Feature of the KC Compact BIOS allows to boot the computer remotely via some kind of "network" connection, which connects to some of the CIO Port A signals | * The "TEST" Feature of the KC Compact BIOS allows to boot the computer remotely via some kind of "network" connection, which connects to some of the CIO Port A signals | ||
[[Category:CPC Internal Components]][[Category:Hardware]][[Category:Programming]] | [[Category:CPC Internal Components]][[Category:Hardware]][[Category:Programming]] | ||
Revision as of 16:23, 28 January 2010
The printer port supports one-directional 7bit data, strobe, and busy signals.
Contents
Data / Strobe
Port EFXX - Printer Port Output 74LS273 (7bit Data and Strobe) (W)
Bit 0-6 Printer Data (7bit) (0=Low, 1=High) Bit 7 Printer Strobe (0=High, 1=Low)
Busy (PIO.PortB.Bit6)
Port F5XX PIO Port B
Bit 0 VSYNC CRTC Vsync flag (1=VSYNC active) Bit 1-3 LK1-3 Distributor Code (see below) Bit 4 LK4 Desired Screen Refresh Rate (0=60Hz, 1=50Hz) (see below) Bit 5 /EXP External Input (used for external hardware only) Bit 6 BUSY Printer Busy flag (1=Busy, 0=Ready) Bit 7 RD DATA Tape Data Input
Pinouts
Upgrade to 8bit data
KC Compact Printer Port
The Printer Port in the KC Compact is fully compatible with the CPCs Printer Port, and includes some additional features:
- Port EFxxh is CIO Port A, by default configured as Output, with inverted polarity on bit7 (same as on CPC). However, CIO Port A could be reprogrammed by software (for example: making it an Input, or disabling the bit7 inversion)
- The 8th Printer bit connects to Bit5 of PIO Port C (same as the Happy Computer 8bit Printer Port mod)
- The "TEST" Feature of the KC Compact BIOS allows to boot the computer remotely via some kind of "network" connection, which connects to some of the CIO Port A signals
