 | Attention article en cours de rédaction. |
Le HuC6270 est le contrôleur graphique (VDC - Video Display Controller). C'est un processeur 16 bits. Il est directement connecté au HuC6260. Le VDC s'occupe de l'affichage de l'arrière plan, des (64) sprites et de la génération de l'image. Il dispose de 64 ko de VRAM dans lesquels les graphiques sont stockés en tile (les graphiques sont découpés en rectangle et stockés en mémoire).
IMAGE
Le brochage du CPU HuC6270 trouvé après de longues heures de recherche... Ce brochage est en cours de validation. Il a été trouvé sur le site suivant : http://nfggames.com/wiki/doku.php?id=schematics:hu6270_netlist
Ci dessous une copie des information du site d'origine en attendant la version validée :
==== Conventions used ====
| Short | Long |
|---|
| Dxx | Data (number) |
| /WR | Write Enable |
| /CE | Chip Enable |
| I/O | Input/Output |
| Axx | Address (number) |
| /OE | Output Enable |
| NC | Not Connected |
| RAxx | RAM pin |
==== Hu6270 Netlist ====
Misc ICs are the two RAM chips (numbered 1, 2, and 12 for both)
| Pin | Title | Hu6280 | Exp Bus | HuCard Port | Hu6260 | MiscIC | Notes |
| 01 | | 60 | | | | | |
| 02 | /WR | 63 | B4 | 34 | 77 | 3 27 | |
| 03 | /OE | 62 | A6 | 26 | 78 | 3 22 | |
| 04 | NC | | | | | | |
| 05 | NC | | | | | | |
| 06 | NC | | | | | | |
| 07 | NC | | | | | | |
| 08 | NC | | | | | | |
| 09 | NC | | | | | | |
| 10 | NC | | | | | | |
| 11 | GND | | | | | | Cap to +5V |
| 12 | NC | | | | | | |
| 13 | D7 | 56 | B08 | 23 | 05 | | Held High |
| 14 | D6 | 55 | A08 | 22 | 06 | | Held High |
| 15 | D5 | 54 | C09 | 21 | 07 | | Held High |
| 16 | D4 | 53 | B09 | 20 | 08 | | Held High |
| 17 | D3 | 52 | C10 | 19 | 09 | | Held High |
| 18 | +5V | | | | | | |
| 19 | D2 | 51 | B10 | 17 | 10 | | Held High |
| 20 | D1 | 50 | C11 | 16 | 11 | | Held High |
| 21 | D0 | 49 | C12 | 15 | 12 | | Held High |
| 22 | | | A10 | | 72 | | Also Hu6270 25 |
| 23 | | | A09 | | 73 | | |
| 24 | /RESET | 11 | B22 | 36 | | | To +5V via R104 +D101 |
| 25 | | | A10 | | 72 | | Also Hu6270 22 |
| 26 | | | B11 | | 71 | | |
| 27 | NC | | | | | | |
| 28 | | | A12 | | 70 | | |
| 29 | | | A13 | | 69 | | |
| 30 | | | B14 | | 68 | | |
| 31 | | | A15 | | 67 | | |
| 32 | +5V | | | | | | |
| 33 | GND | | | | | | |
| 34 | | | A16 | | 66 | | |
| 35 | | | A17 | | 65 | | |
| 36 | | | A18 | | 64 | | |
| 37 | | | A19 | | 63 | | |
| 38 | | | A20 | | 62 | | |
| 39 | *WE | | | | | 12 27 | |
| 40 | *OE | | | | | 12 22 | |
| 41 | I/O 0 | | | | | 1 11 | |
| 42 | I/O 1 | | | | | 1 12 | |
| 43 | I/O 2 | | | | | 1 13 | |
| 44 | I/O 3 | | | | | 1 15 | |
| 45 | I/O 4 | | | | | 1 16 | |
| 46 | I/O 5 | | | | | 1 17 | |
| 47 | +5V | | | | | | |
| 48 | I/O 6 | | | | | 1 18 | |
| 49 | I/O 7 | | | | | 1 19 | |
| 50 | I/O 0 | | | | | 2 11 | |
| 51 | I/O 1 | | | | | 2 12 | |
| 52 | I/O 2 | | | | | 2 13 | |
| 53 | I/O 3 | | | | | 2 15 | |
| 54 | I/O 4 | | | | | 2 16 | |
| 55 | GND | | | | | | |
| 56 | I/O 5 | | | | | 2 17 | |
| 57 | I/O 6 | | | | | 2 18 | |
| 58 | I/O 7 | | | | | 2 19 | |
| 59 | RA14 | | | | | 12 10 | |
| 60 | RA13 | | | | | 12 09 | |
| 61 | RA12 | | | | | 12 08 | |
| 62 | RA11 | | | | | 12 07 | |
| 63 | RA10 | | | | | 12 06 | |
| 64 | RA09 | | | | | 12 05 | |
| 65 | RA08 | | | | | 12 04 | |
| 66 | RA07 | | | | | 12 03 | |
| 67 | RA03 | | | | | 12 25 | |
| 68 | RA02 | | | | | 12 24 | |
| 69 | RA00 | | | | | 12 21 | |
| 70 | RA01 | | | | | 12 23 | |
| 71 | GND | | | | | | |
| 72 | +5V | | | | | | |
| 73 | RA06 | | | | | 12 02 | |
| 74 | RA04 | | | | | 12 26 | |
| 75 | RA05 | | | | | 12 01 | |
| 76 | *CE | | | | | 12 20 | |
| 77 | | 44 | | | | | Held High |
| 78 | | 12 | B20 | | | | Held High |
| 79 | A0 | 6 | B12 | 14 | 74 | | |
| 80 | A1 | 5 | C13 | 13 | 75 | | | |
De la documentation un peu plus complète sur le VDC pour la programmation est disponible à cette adresse.
