[rescue] SPARCstation SLC connector pinout

[Romain Dolbeau]

Le mer. 20 juil. 2022 à 06:25, Joshua D. Boyd <jdboyd at jdboyd.net> a écrit :
> What is this nubus fpga you mention?

My under-covid-lockdown project to create a new SBus device using a
FPGA daughtercard to add some peripherals to my SPARCstation:
<https://github.com/rdolbeau/SBusFPGA>.

It started as a way to learn hardware design, and turned out to work
much better than I'd originally hoped. V1.2 has OHCI-compliant USB
1.1, a micro-sd card (bootable from OPB3), and an extra connector
('pmod') to prototype additional stuff like a I2C bus with temperature
sensor or the aforementioned low-color-depth VGA output. NetBSD 9.0 is
my OS of choice (as it's easier for me to write drivers for it than
for vintage OSes).

NuBusFPGA is the same idea but for old Macs with NuBus connector (Mac
II, Quadra). Designed after SBusFPGA V1.2, it has working digital
video output so you get a depth-switchable (1/2/4/8/16/32 bits)
framebuffer at up to 1920x1080 with some optional basic acceleration.

Unfortunately the cost of electronic components has shot up, in
particular for FPGAs; the daughterboard I'm using is 25-33% more
expensive now that it was a couple of years ago, making the whole
thing quite expensive (in addition to somewhat bulkier than a SBus or
NuBus device should be).

Cordially,

-- 
Romain Dolbeau