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Forum: General Discussion
 Topic: Multicomp Cyclone IV-B
Re: Multicomp Cyclone IV-B [message #4352 is a reply to message #4351] Sun, 18 February 2018 00:44
rhkoolstar is currently offline  rhkoolstar
Messages: 166
Registered: October 2015
Senior Member
Making a PCB for a new footprint is trivial, you just need the miniboard itself, because they tend to use off-grid spacing between headers.
These cheaper boards do not have the AS-interface and I have yet to figure out how to program the EPCS4 memory with JTAG. I guess I need the Serial Flash Loader Megafunction. Maybe I should look into that sometime...

As things stand, I still like the Cyclone II boards. I feel it quite adequate to have a VGA console plus 2 full handshake serials.


Re: Multicomp Cyclone IV-B [message #4353 is a reply to message #4352] Sun, 18 February 2018 01:29
b1ackmai1er is currently offline  b1ackmai1er
Messages: 41
Registered: November 2017
Member
Manufacturer say:

"JTAG: You need use ALTERA USB Blaster or ByteBlasterII Download .SOF file to FPGA chip via JTAG , but if power loss the program will be loss . You want the program not loss, you need to download .JIC file to EPCS16(or M25P16) SPI FLASH via JTAG"

Altera say:

https:// www.altera.com/support/support-resources/knowledge-base/solu tions/rd10132010_126.html

It's easy!!!

(LOL)

Edit:

It might be a bit easier than that:

http://www.alterawiki.com/wiki/EPCS_Guide

Sorry for steeling you thread Gary

[Updated on: Sun, 18 February 2018 01:54]

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Re: Multicomp Cyclone IV-B [message #4354 is a reply to message #4353] Sun, 18 February 2018 02:39
b1ackmai1er is currently offline  b1ackmai1er
Messages: 41
Registered: November 2017
Member
Are you sure there is a CPM 3 image on the SD card?

Have you changed memory configuration since you last used it i.e. removed or replaced a ram chip.

Does ram disk work ok on CPM/MPM?

Is it possible RTC has lost date & time

This is such the nature of computers ...
Re: Multicomp Cyclone IV-B [message #4355 is a reply to message #4353] Sun, 18 February 2018 02:42
rhkoolstar is currently offline  rhkoolstar
Messages: 166
Registered: October 2015
Senior Member
I think Gary is busy rebuilding his system Smile

Thanks for the link. Saves me the task of looking it up myself.
 Topic: TinyZZ, a Z280 SBC
Re: TinyZZ, a Z280 SBC [message #4356 is a reply to message #4348] Sun, 18 February 2018 12:59
etchedpixels is currently offline  etchedpixels
Messages: 89
Registered: October 2015
Member
For cross compilers I think it comes down to SDCC. Even z88dk has moved to SDCC as it's core.
Re: TinyZZ, a Z280 SBC [message #4357 is a reply to message #4356] Sun, 18 February 2018 16:48
plasmo is currently offline  plasmo
Messages: 214
Registered: March 2017
Location: New Mexico, USA
Senior Member
Since there are some interests in having 16 meg of memory, I modified my CPLD equations and inserted a 16 meg SIMM module in the socket. It appears to work. All I know of the Z280 MMU is from what I read in the Preliminary Technical Manual, July 1987. I programmed the MMU based on these rather brief description. I did some double checks to make sure it is actually read/write the 16 meg of memory, but I'm not really confident of my understanding. My memory diagnostic takes 3 minutes to do 16 meg. Is there a Z280 memory diagnostic out there to double check my hardware?
 Topic: debug help wanted (n8,zeta2)
debug help wanted (n8,zeta2) [message #4358] Sun, 18 February 2018 16:54
zenxyzzy is currently offline  zenxyzzy
Messages: 5
Registered: September 2017
Location: san francisco
Junior Member
I've got 2 board that are just not anywhere near reliable. the n8 is a brick, and the zeta8
has persistent errors getting at the rom disk.

since I stocked the boards from my (admittedly huge) parts collection, each of these boards
is a mix of ls, als, f, and hct. also, sourcing parts these days is amazingly horrible, with
rampant counterfeits from china polluting the supply chain.

for example, on the zeta2, out of 10 (marked) z80c0020pec, I got 1 that ran at 12, 2 that ran at 8,
one that ran at 6, and the rest were bricks. who knows if they were even z80's at all?

anyhow, my N8 is date stamped 4617 on the bottom left of the board, and the jumper settings for
the xx11 version don't match up perfectly, and the BOM is not clear what is sensitive to 74xx technology.

If anybody has a recent N8 that works, can you send me a reasonably high resolution photo of your entire
board that captures the chips and jumper settings? I'm mostly interested in which chip family and what
jumper settings you used.

in the same vein, a working zeta2 (mine is stamped version 2.0) with chip versions, etc.

one big question I have is oscillators. I know the zilog chips are wanting the oscillators to be driven
to the rail, and many metal can oscillators are only spec'd to go to TTL true, or 2.4V. this sucks massively.
Is this an issue for anybody?

once these guys get running, I'll tackle my mark IV and reh280. I've got a lot of non-running boards.

--curt



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