just to clarify, this topic is related to FPGA BLiTTER https://www.exxosforum.co.uk/forum/viewt ... &t=79#p205
Which can be programmed as a pure BLiTTER replacement or CPU+BLiTTER (this is covered by my "crazy idea")
I have a crazy idea.
As the BLiTTER (left) has almost the same pinout as 68000 (right), would be possible to add missing pins?
It would allow to extend functionality by cpu emulation like Ijor's FX Cast or T68k with its ultra speed.
BLITTER IN A ST - FPGA
BLITTER IN A ST - FPGA
Lynx I / Mega ST 1 / 7800 / Portfolio / Lynx II / Jaguar / TT030 / Mega STe / 800 XL / 1040 STe / Falcon030 / 65 XE / 520 STm / SM124 / SC1435
DDD HDD / AT Speed C16 / TF536 / SDrive / PAK68/3 / Lynx Multi Card / LDW Super 2000 / XCA12 / SkunkBoard / CosmosEx / SatanDisk / UltraSatan / USB Floppy Drive Emulator / Eiffel / SIO2PC / Crazy Dots / PAM Net
http://260ste.atari.org
DDD HDD / AT Speed C16 / TF536 / SDrive / PAK68/3 / Lynx Multi Card / LDW Super 2000 / XCA12 / SkunkBoard / CosmosEx / SatanDisk / UltraSatan / USB Floppy Drive Emulator / Eiffel / SIO2PC / Crazy Dots / PAM Net
http://260ste.atari.org
Re: BLITTER IN A ST
Add missing pins to what exactly ? The blitter and CPU have totally different pinouts and pins.. You can pretty much link all the address & databus from the blitter to the CPU, but you also have to re-route the BGI,BGO pins from GLUE to the blitter as well, because those solder jumpers which are normally on the STFM etc are not on the ST, so you have to also re-route a couple pins on the GLUE as well.
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
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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.
Re: BLITTER IN A ST
look the screenshot above, the pinout is almost the same.
difference is e.g.: the BLiTTER site: lack of IPL signals; doubled pins for bus granting (one set for MMU, the other for CPU) etc.
Lynx I / Mega ST 1 / 7800 / Portfolio / Lynx II / Jaguar / TT030 / Mega STe / 800 XL / 1040 STe / Falcon030 / 65 XE / 520 STm / SM124 / SC1435
DDD HDD / AT Speed C16 / TF536 / SDrive / PAK68/3 / Lynx Multi Card / LDW Super 2000 / XCA12 / SkunkBoard / CosmosEx / SatanDisk / UltraSatan / USB Floppy Drive Emulator / Eiffel / SIO2PC / Crazy Dots / PAM Net
http://260ste.atari.org
DDD HDD / AT Speed C16 / TF536 / SDrive / PAK68/3 / Lynx Multi Card / LDW Super 2000 / XCA12 / SkunkBoard / CosmosEx / SatanDisk / UltraSatan / USB Floppy Drive Emulator / Eiffel / SIO2PC / Crazy Dots / PAM Net
http://260ste.atari.org
Re: BLITTER IN A ST
The pinout is totally different, just look at the numbering on the chips..
You need a adapter PCB with the blitter pinout and wire it up to the CPU pinout..
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.
Re: BLITTER IN A ST
ok, you mean the order of pins. sorry my english isn't perfect.
the pin order is different but functionality of those pins is the same, besides small changes mentioned earlier.
my crazy idea was to adopt that fpga blitter to: 1) the cpu slot pinout; 2) fully compatible pins funcionalities.
And use that fpga in all ST(f/m/e) line.
Lynx I / Mega ST 1 / 7800 / Portfolio / Lynx II / Jaguar / TT030 / Mega STe / 800 XL / 1040 STe / Falcon030 / 65 XE / 520 STm / SM124 / SC1435
DDD HDD / AT Speed C16 / TF536 / SDrive / PAK68/3 / Lynx Multi Card / LDW Super 2000 / XCA12 / SkunkBoard / CosmosEx / SatanDisk / UltraSatan / USB Floppy Drive Emulator / Eiffel / SIO2PC / Crazy Dots / PAM Net
http://260ste.atari.org
DDD HDD / AT Speed C16 / TF536 / SDrive / PAK68/3 / Lynx Multi Card / LDW Super 2000 / XCA12 / SkunkBoard / CosmosEx / SatanDisk / UltraSatan / USB Floppy Drive Emulator / Eiffel / SIO2PC / Crazy Dots / PAM Net
http://260ste.atari.org
Re: BLITTER IN A ST
My first step would be to design a blitter breakout pcb, so that all the pins are available easily and you're not just soldering to the back of a socket.
Of course you could incorporate a cpu adaptor into this for data lines etc.
The longer you plan, the easier itll be
Of course you could incorporate a cpu adaptor into this for data lines etc.
The longer you plan, the easier itll be
If it ain't broke, test it to Destruction.
Re: BLITTER IN A ST
Lynx I / Mega ST 1 / 7800 / Portfolio / Lynx II / Jaguar / TT030 / Mega STe / 800 XL / 1040 STe / Falcon030 / 65 XE / 520 STm / SM124 / SC1435
DDD HDD / AT Speed C16 / TF536 / SDrive / PAK68/3 / Lynx Multi Card / LDW Super 2000 / XCA12 / SkunkBoard / CosmosEx / SatanDisk / UltraSatan / USB Floppy Drive Emulator / Eiffel / SIO2PC / Crazy Dots / PAM Net
http://260ste.atari.org
DDD HDD / AT Speed C16 / TF536 / SDrive / PAK68/3 / Lynx Multi Card / LDW Super 2000 / XCA12 / SkunkBoard / CosmosEx / SatanDisk / UltraSatan / USB Floppy Drive Emulator / Eiffel / SIO2PC / Crazy Dots / PAM Net
http://260ste.atari.org
Re: BLITTER IN A ST
I agree - planning is key but expect to have failures as even the best planning can not cover everything. I have had many failures with board design and it takes a few iterations to get things right. e.g. the IDE DEV Board was the closest to working first time but we still needed to patch the board.PhilC wrote: ↑Fri Jul 26, 2019 12:28 pm My first step would be to design a blitter breakout pcb, so that all the pins are available easily and you're not just soldering to the back of a socket.
Of course you could incorporate a cpu adaptor into this for data lines etc.
The longer you plan, the easier itll be
Re: BLITTER IN A ST
Got it!
Artik-wroc, my colleague from Atari.org.pl forum, sent me an article from ST-Computer Issue form November 1988:
http://www.stcarchiv.de/stc1988/11/blit ... achruesten
and screenshot below.
Based on them, some years ago he did BLiTTER's daughterboard for short ST.
Artik-wroc, my colleague from Atari.org.pl forum, sent me an article from ST-Computer Issue form November 1988:
http://www.stcarchiv.de/stc1988/11/blit ... achruesten
and screenshot below.
Based on them, some years ago he did BLiTTER's daughterboard for short ST.
Lynx I / Mega ST 1 / 7800 / Portfolio / Lynx II / Jaguar / TT030 / Mega STe / 800 XL / 1040 STe / Falcon030 / 65 XE / 520 STm / SM124 / SC1435
DDD HDD / AT Speed C16 / TF536 / SDrive / PAK68/3 / Lynx Multi Card / LDW Super 2000 / XCA12 / SkunkBoard / CosmosEx / SatanDisk / UltraSatan / USB Floppy Drive Emulator / Eiffel / SIO2PC / Crazy Dots / PAM Net
http://260ste.atari.org
DDD HDD / AT Speed C16 / TF536 / SDrive / PAK68/3 / Lynx Multi Card / LDW Super 2000 / XCA12 / SkunkBoard / CosmosEx / SatanDisk / UltraSatan / USB Floppy Drive Emulator / Eiffel / SIO2PC / Crazy Dots / PAM Net
http://260ste.atari.org
Re: BLITTER IN A ST
I can understand why one wants a glitter but there are ST's that have a spot to populate a glitter, Exxos would most likely know the board part number. It would be a lot easier getting a board that has the spot for a glitter that attempting to add one.Cyprian wrote: ↑Fri Jul 26, 2019 11:14 am just to clarify, this topic is related to FPGA BLiTTER https://www.exxosforum.co.uk/forum/viewt ... &t=79#p205
Which can be programmed as a pure BLiTTER replacement or CPU+BLiTTER (this is covered by my "crazy idea")
I have a crazy idea.
As the BLiTTER (left) has almost the same pinout as 68000 (right), would be possible to add missing pins?
It would allow to extend functionality by cpu emulation like Ijor's FX Cast or T68k with its ultra speed.
CPU_BLiTTER.png