| Chipset(s) |
Cirrus Logic GD5446 |
| Graphics Memory |
4MB (45ns EDO) |
| 8bit Support: |
Yes |
| 16bit Support: |
Yes |
| 24bit Support: |
Yes |
| Display Drivers |
|
| CyberGraphX V2: |
No |
| CyberGraphX V3: |
Yes |
| CyberGraphX V4: |
Yes |
| Picasso 96: |
Yes |
| EGS: |
No |
| Other: |
No |
The Picasso IV is a Zorro II and III auto-sensing graphics card. It has a pixel clock of 135Mhz (8bit), 85Mhz (16bit) and 85Mhz (24bit). It contains a built in 100Hz flicker fixer. If the Picasso IV is intended for use in an A2000, the flicker fixer can actually be "snapped" from the card and joined to it by a ribbon cable. This is because the A2000 does not have an inline video slot, like other models. It also contains a local PCI expansion bus, for which several add-on cards were made, such as the Paloma IV TV Card, the Pablo IV video encoder, and the Concierto sound card. A 3D module based around the VooDoo chipset, and a MPEG module were planned, but unfortunately were never released. The card also contains a 4-channel audio mixer, a CDROM input connector, a Flash ROM controller (for updating the firmware) and is endian agnostic.
Jumpers
| Jumper |
Open |
Closed |
| 1 |
4MB RAM |
Force 2MB RAM |
| 2 |
Auto-Sensing |
Force Zorro II |
| 3 |
Forced 24bit flickerfixer |
24bit & 12bit auto-sensing flickerfixer |
| 4 |
Sync on Green disabled |
Sync on Green Enabled |
| 5 |
Changed AGA flicker timing |
Unchanged AGA flicker timing |
| 6 |
Reserved, Default |
DO NOT CLOSE |
Example Display Modes
| Resolution |
Depth |
Frequency |
| 1600 x 1280 |
8 |
51Hz |
| 1280 x 1024 |
8 |
73Hz |
| 1152 x 900 |
8 |
96Hz |
| 1600 x 1280 |
16 |
64Hz |
| 1280 x 1024 |
16 |
92Hz |
| 1152 x 900 |
16 |
60Hz |
| 1024 x 768 |
16 |
79Hz |
| 1280 x 1024 |
24 |
92Hz |
| 1152 x 900 |
24 |
60Hz |
| 1024 x 768 |
24 |
79Hz |