Chris Collins

Tagged “blitter”

Exploration ·

How the Amiga drew Boing

A red and white ball bouncing across a purple grid sold a computer. Take it apart with live tools — the copper and the beam, colour cycling, sprites and blitter objects, the cookie-cut blit, the fight for chip RAM, and Paula's boom — and see how a 7 MHz machine made it look effortless.

Amiga

Tool ·

Amiga DMA slot timing

See who owns every colour clock of an Amiga scanline — refresh, disk, audio, sprites, bitplanes, copper, blitter and the 68000 — and how screen depth, resolution, overscan and blitter-nasty steal chip-RAM time, with per-frame and per-second budgets for PAL and NTSC.

Amiga

Tool ·

Amiga blitter lab

Work out Amiga blitter set-ups: minterms from a truth table, Venn diagram or Boolean expression (and LF back to the shortest expression), cookie-cut, masked, XOR, clear, rectangle and area-fill blits stepped word by word with shifts, masks and modulos, line mode with octants and the Bresenham registers, the DMA cost, and the register set-up as C or assembler.

Amiga

Tool ·

Amiga custom chip registers

Every OCS, ECS and AGA custom chip register at $DFF000, searchable; bit-field decoders for DMACON, INTENA, BPLCON0–4, ADKCON, POTGO and more; a display-window and data-fetch calculator; a blitter minterm calculator; and a copper list assembler and disassembler.

Amiga

Tool ·

Copper and blitter playground

Write an Amiga copper list and watch it run against the PAL or NTSC beam — raster bars, split palettes, per-pixel colour changes, animated with expressions — and run real blits with shifts, masks, minterms, and area fill on bitmaps you draw.

Amiga