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Re: [N8VEM-S100:3100] GAL's and PALASM

Probably will be a long time until Lattice 22v10's are unavailable. There are 100's of thousands of them out there. "Pulls" should be OK since according to Lattice they can be programmed at least 100 times. I had no luck what so ever programming the Atmel chips. Wrote to Wellon, no reply. 

Amongst my "back burner" projects is a MSDOS xvga board for the s100 bus. with Andrew we have gone through about 6 prototypes using  Cirrus and Trident chips.  Some progress but still problems.  Currently I have my hopes on a new ISA to S100 bus converter board using GAL's. 
Problems are too convoluted to explain here. 

Any true VGA board somebody could do would really move S100 bus systems into a higher orbit. Will be announcing a 80386 S100 master/slave soon. Already laying plans for the next step an 80486.... If we then could get a GB DRAM board we would be airborne

On Apr 15, 2014, at 5:58 PM, Andrew Bingham <abin...@gmail.com> wrote:

I think these are what you are looking from from Atmel - http://www.atmel.com/products/other/spld-cpld/spld-industry_standard.aspx - $2 for the 20 mA version.

They may be more challenging to get programmed properly than the old-school PALs with simple fuses though, since they are electronically erasable.  John and I corresponded about them a little bit while he was writing up this initial tutorial and he couldn't get them to program.  So if one of us could help work that out they might be an option as well.  I'm swamped with my actual job right now but hopeful I will be able to break away soon and try some out. 

I have an idea in my head that if one of us gets smart enough with CPLDs/FPGAs, we could do an N8VEM FPGA video chip. Kind of like the LAVA-10 but a design we could all have access to and port to new FPGAs as needed and not depend on another supplier.  I have looked around and the supply of a lot of the vintage video chips is kind of drying up - I had to order an 8563R9 from the UK to build my ECB Color VDU V2.  I also think it would be possible to make a hobbyist board with a DVI transmitter to attach to modern monitors.  

Andrew B

On Tuesday, April 15, 2014 1:37:15 PM UTC-7, Vince Mulhollon wrote:
On Tuesday, April 15, 2014 2:36:42 PM UTC-5, Thierry Schembri wrote:
SPLDs from Texas or Atmel should work no?

I believe you are correct and I retract my previous claim.  Lattice stopped making them years and years ago but Atmel makes some in the ATF750 series.  I like the DIP package and 5v supply and 10 ns speed but don't much like the $8 a piece price.  Still if they replace an entire handful of discrete TTL even the price is a net win.

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