NuBusFPGA/README.md

# A FPGA on a NuBus card...

## Goal

The goal of this repository is to be able to interface a modern (2021 era) [FPGA](https://en.wikipedia.org/wiki/Field-programmable_gate_array) with a [NuBus](https://en.wikipedia.org/wiki/NuBus) host, specifically Apple's [Macintosh II](https://en.wikipedia.org/wiki/Macintosh_II_family) and [Macintosh Quadra](https://en.wikipedia.org/wiki/Macintosh_Quadra).

## Current status

First prototype is working in a Quadra 650. It implements a basic single-resolution, depth-switchable (1/2/4/8/16/32 bits) framebuffer over HDMI. The framebuffer can be used as secondary/primary/only framebuffer in the machine running OS8.1. QEmu tests indicate this should work with 7.1 & 7.5/7.6 as well.

Some basic acceleration now exists for 8/16/32 bits, doing rectangle screen-to-screen blits and solid rectangle fills.
push to github 2021-12-21 07:26:30 +00:00			`# A FPGA on a NuBus card...`

			`## Goal`

typos 2021-12-21 07:27:11 +00:00			`The goal of this repository is to be able to interface a modern (2021 era) [FPGA](https://en.wikipedia.org/wiki/Field-programmable_gate_array) with a [NuBus](https://en.wikipedia.org/wiki/NuBus) host, specifically Apple's [Macintosh II](https://en.wikipedia.org/wiki/Macintosh_II_family) and [Macintosh Quadra](https://en.wikipedia.org/wiki/Macintosh_Quadra).`
push to github 2021-12-21 07:26:30 +00:00
			`## Current status`

accel in 16/32 ; includes adding MUL to Vex & fixing a FIFO overrun in NuBus in 32 bits mode 2022-06-04 12:55:40 +00:00			`First prototype is working in a Quadra 650. It implements a basic single-resolution, depth-switchable (1/2/4/8/16/32 bits) framebuffer over HDMI. The framebuffer can be used as secondary/primary/only framebuffer in the machine running OS8.1. QEmu tests indicate this should work with 7.1 & 7.5/7.6 as well.`

			`Some basic acceleration now exists for 8/16/32 bits, doing rectangle screen-to-screen blits and solid rectangle fills.`