Chips › Graphics & video › Home-computer video › Atari GTIA
Atari GTIA
1979
Atari's Graphic Television Interface Adapter, generating colour and player-missile sprites on Atari 8-bit computers.
Machines
Emulators
| Emulator | Type | License | Site |
|---|---|---|---|
| Altirra | downloadable | GPL-2.0 | Website ↗ |
| Atari 5200 | online | MIT | Website ↗ |
| Atari++ | downloadable | GPL-2.0 | Website ↗ |
| Atari800 | downloadable | GPL-2.0 | Website ↗ |
| Atari800MacX | downloadable | GPL-2.0 | Website ↗ |
| Fujisan | downloadable | GPL-2.0 | Website ↗ |
| Rainbow | downloadable | Freeware | Website ↗ |
| Sfotty Pie A8 | online | MIT | Website ↗ |
| Xformer | downloadable | Freeware | Website ↗ |
| jsA8E | online | Freeware | Website ↗ |
Reference & documentation
External technical references for programming Atari GTIA and for writing emulators.
| Resource | Type | Notes |
|---|---|---|
| Altirra Hardware Reference Manual (Avery Lee) ↗ | Datasheet | Definitive cycle-exact ANTIC hardware behavior for emulator authors |
| CTIA/GTIA Register Reference ↗ | Memory map | Every $D000-$D01F register, read/write, bit-by-bit |
| CTIA/GTIA Pinout Diagram ↗ | Pinout | 40-pin signal assignments with function descriptions |
| Atari GTIA (CO14805) pin-out SVG ↗ | Pinout | Vector NTSC GTIA pinout diagram, reusable |
| De Re Atari - Appendix E: GTIA ↗ | Programming | GTIA graphics modes 9/10/11 programming from Atari |
| CTIA and GTIA - Wikipedia ↗ | Reference | Architecture, registers, collisions, priority, GTIA modes |
| CTIA/GTIA (jindroush hardware notes) ↗ | Reference | Chip variants, catalogue numbers, revision bugs, pinout |
| atari800 emulator gtia.c source ↗ | Source | Reference C implementation of GTIA emulation |