[rescue] [OT] S: IBM /370 or /390 card

[Romain Dolbeau]

On 9/17/23 16:18, Romain Dolbeau via rescue wrote:
> Be warned, both the PCB and a lot of the HW design are the work of a 
> newbie

I had another look at it, and yes a redesign is probably overdue to 
clean it up and cut down costs... With available I/Os on the current 
FPGA board, I'm targetting USB, I2C (those machines need temperature 
monitoring to preserve them...), HDMI connector (I known, but it's by 
far the best option from a FPGA), and an expansion Pmod to add  back the 
micro-sd or some other features. And cut down the IRQ's range from 1-6 
to only 2-5 to save pins, didn't use that many in practice (V1.0 only 
had 1 & 7, and that was not a good combination).

Going single-sided and doing it at JLCPCB (V1.0/V1.2 were made at 
SeeedStudio and double-sided and not cheap), it should be possible to 
have a 'reasonable' manufacturing costs, probably less than $200 for 5 
with components assembled, excluding only the easily hand-solderable 
through-hole connectors (pair of 2x32 2.54mm B2B header plus the SBus 
connector itself). The made-in-Germany FPGA daughterboard will be the 
most expensive part by far, they are around 200€ w/ VAT at the moment.

Cordially,

-- 
Romain Dolbeau