HuCard pinout: Difference between revisions
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(Adds HuCard pinout.) |
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==Pinout== | ==Pinout== | ||
Card | | PC | Card | | PC Engine | ||
-----+--+-------------------------- | -----+--+-------------------------- | ||
1 |->| /CD | 1 |->| /CD | ||
| Line 23: | Line 23: | ||
20 |<>| CPU D4 (PCE) or D3 (TG16) | 20 |<>| CPU D4 (PCE) or D3 (TG16) | ||
21 |<>| CPU D5 (PCE) or D2 (TG16) | 21 |<>| CPU D5 (PCE) or D2 (TG16) | ||
22 |<>| CPU D6 (PCE) or D1 (TG16) | 22 |<>| CPU D6 (PCE) or D1 (TG16) | ||
23 |<>| CPU D7 (PCE) or D0 (TG16) -------------------------- | 23 |<>| CPU D7 (PCE) or D0 (TG16) Orientation: | ||
24 |<-| CPU PA20 -------------------------- | |||
25 |<-| CPU PA10 .-------------------. | |||
26 |<-| CPU /RD | .---------..------| | |||
27 |<-| CPU PA11 | | || |- 1 | |||
28 |<-| CPU PA9 |>| Label || | | |||
29 |<-| CPU PA8 | | || |- 38 | |||
30 |<-| CPU PA13 | '---------<nowiki>''</nowiki>------| | |||
31 |<-| CPU PA14 '-------------------' | |||
32 |<-| CPU PA17 | |||
33 |<-| CPU PA18 Legend: | |||
34 |<-| CPU /WR -------------------------- | |||
35 |<-| HSM [HuCard]-- Power, n/a | |||
36 |<-| /RST [HuCard]- | 36 |<-| /RST [HuCard]<- HuCard input | ||
37 |->| /IRQ2 [HuCard] | 37 |->| /IRQ2 [HuCard]-> HuCard output | ||
38 |--| +5V [HuCard] | 38 |--| +5V [HuCard]<> Bidirectional | ||
==Signal descriptions== | ==Signal descriptions== | ||
| Line 45: | Line 45: | ||
* '''AUDIO IN''': Mono audio. Mixed into both channels. | * '''AUDIO IN''': Mono audio. Mixed into both channels. | ||
* '''CPU PA20..0''': CPU physical address (the 21-bit post-MMU address). PA20 is used as /CE. | * '''CPU PA20..0''': CPU physical address (the 21-bit post-MMU address). PA20 is used as /CE. | ||
* '''CPU D7..0''': The order of these pins depends on region. For PC | * '''CPU D7..0''': The order of these pins depends on region. For PC Engine, they are ascending, and for TurboGrafx-16, they are descending. | ||
* '''HSM''': High speed mode, asserted by the CPU when operating at 7.16 MHz. | * '''HSM''': High speed mode, asserted by the CPU when operating at 7.16 MHz. | ||
Latest revision as of 13:26, 28 August 2023
Pinout
Card | | PC Engine -----+--+-------------------------- 1 |->| /CD 2 |->| AUDIO IN 3 |<-| CPU PA19 4 |<-| CPU PA16 5 |<-| CPU PA15 6 |<-| CPU PA12 7 |<-| CPU PA7 8 |<-| CPU PA6 9 |<-| CPU PA5 10 |<-| CPU PA4 11 |<-| CPU PA3 12 |<-| CPU PA2 13 |<-| CPU PA1 14 |<-| CPU PA0 15 |<>| CPU D0 (PCE) or D7 (TG16) 16 |<>| CPU D1 (PCE) or D6 (TG16) 17 |<>| CPU D2 (PCE) or D5 (TG16) 18 |--| GND 19 |<>| CPU D3 (PCE) or D4 (TG16) 20 |<>| CPU D4 (PCE) or D3 (TG16) 21 |<>| CPU D5 (PCE) or D2 (TG16) 22 |<>| CPU D6 (PCE) or D1 (TG16) 23 |<>| CPU D7 (PCE) or D0 (TG16) Orientation: 24 |<-| CPU PA20 -------------------------- 25 |<-| CPU PA10 .-------------------. 26 |<-| CPU /RD | .---------..------| 27 |<-| CPU PA11 | | || |- 1 28 |<-| CPU PA9 |>| Label || | 29 |<-| CPU PA8 | | || |- 38 30 |<-| CPU PA13 | '---------''------| 31 |<-| CPU PA14 '-------------------' 32 |<-| CPU PA17 33 |<-| CPU PA18 Legend: 34 |<-| CPU /WR -------------------------- 35 |<-| HSM [HuCard]-- Power, n/a 36 |<-| /RST [HuCard]<- HuCard input 37 |->| /IRQ2 [HuCard]-> HuCard output 38 |--| +5V [HuCard]<> Bidirectional
Signal descriptions
- /CD: Card detect. Connects to the expansion port. Grounded by the HuCard so the CD-ROM2 can tell a card is inserted.
- AUDIO IN: Mono audio. Mixed into both channels.
- CPU PA20..0: CPU physical address (the 21-bit post-MMU address). PA20 is used as /CE.
- CPU D7..0: The order of these pins depends on region. For PC Engine, they are ascending, and for TurboGrafx-16, they are descending.
- HSM: High speed mode, asserted by the CPU when operating at 7.16 MHz.
