@ Guus
Let us know what price you're after shipped to the UK and I'll weigh up my options.
Cheers
Soph
WANTED MegaST 68881 copro board C103067 / SPF004
- SophieRose
- Posts: 33
- Joined: Mon Dec 28, 2020 4:47 am
- Location: Leamington Spa
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Re: WANTED MegaST 68881 copro board C103067 / SPF004
Musician and Atari ST user. https://sophie-rose.bandcamp.com
Mega ST4 T28, 1040STE & 520STM, Amiga 600, Link 480Z, Amstrad 6128 plus, Timex2048, C128, C64, MSX HB201P. Plus too many more.
Mega ST4 T28, 1040STE & 520STM, Amiga 600, Link 480Z, Amstrad 6128 plus, Timex2048, C128, C64, MSX HB201P. Plus too many more.
Re: WANTED MegaST 68881 copro board C103067 / SPF004
It is Chinese New Year between 6feb-18feb so it will probably take a while longer. But maybe PCBway function anyway?
EDIT: Apparently 12feb-26feb. I was a bit off.
EDIT: Apparently 12feb-26feb. I was a bit off.
- frank.lukas
- Posts: 663
- Joined: Fri Jan 19, 2018 11:52 am
Re: WANTED MegaST 68881 copro board C103067 / SPF004
The Layout with Eagle PCB is errorfree but it do not work. So there is something wrong with the design ...
The design is from Djordje Vukovic.
The design is from Djordje Vukovic.
Re: WANTED MegaST 68881 copro board C103067 / SPF004
DSACK0 is floating ?
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
- frank.lukas
- Posts: 663
- Joined: Fri Jan 19, 2018 11:52 am
Re: WANTED MegaST 68881 copro board C103067 / SPF004
DSACK0 is low active, should I put the pin with 4.7k high?
- frank.lukas
- Posts: 663
- Joined: Fri Jan 19, 2018 11:52 am
Re: WANTED MegaST 68881 copro board C103067 / SPF004
czietz told me ...
DSACK0 is an output of the FPU and with regard to the 16-bit operation used here, see the manual of the MC68881: "it is not necessary to connect the DSACK0 pin since the FPCP never asserts it in this configuration."
DSACK0 is an output of the FPU and with regard to the 16-bit operation used here, see the manual of the MC68881: "it is not necessary to connect the DSACK0 pin since the FPCP never asserts it in this configuration."
Re: WANTED MegaST 68881 copro board C103067 / SPF004
How do you know it's not working ? You also need custom libs and code as the FPU io mapped isn't normally compatible with linef 030 instructions. Its why GB6 doesn't support io mapped as nobody ever uses io mapped.
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
- frank.lukas
- Posts: 663
- Joined: Fri Jan 19, 2018 11:52 am
Re: WANTED MegaST 68881 copro board C103067 / SPF004
Can anyone make a schematics from a Atari SPF004 ... ?
Re: WANTED MegaST 68881 copro board C103067 / SPF004
I know I found a benchmark program that could do I/O mapped FPU when I added one to my MSTE - but now I can't figure out what it was. While looking for it, I see GFA v3.6 supports it though.
/Troed
Re: WANTED MegaST 68881 copro board C103067 / SPF004
Never heard of one past GB4. DML wrote GB6's FPU code. We decided it wasn't worth adding io mapped for what few machines had it. Even so, I would assume the code overhead running in ram would be where most of the benchmark speed goes. So it would just end up like a slightly faster ram test kinda thing.
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.