Atari-Forum

Hi,

it's simply a digital-to-analog converter using buffers and a resistor network to end up on an operational amp.
https://en.wikipedia.org/wiki/Resistor_ladder

thanks
Olivier

May be my discription it's not clear:

1) i respect the TP number like this:


2) i respect the name R/W like this:


thanks
Olivier

Hello all, I try to merge all schematics of ATARI IDE IF V2 & Flash TOS x4 from http://atari.8bitchip.info/astams.php My idea is create PCB with flash memory for reduce the wiring. I delete the part 6 ROMs, not need if i place 2 x ROM on PCB (it seems logical to me) But i see on ATARI ST IDE IF....

Hi,

I have recieved all components, the result.

Hi, I have ordered this monitor this week and recieved. Works on all ST Resolution with adaptor: http://www.atari-forum.com/viewtopic.php?f=15&t=30521 https://www.befr.ebay.be/itm/NEC-LCD1970NXp-19-1280-x-1024-250-cd-m-20ms-VGA-DVI-Schwarz-Silber-TCO03/302619863442?ssPageName=STRK%3AMEBIDX%3AIT&...

Hi,

Forget this post.
I have installed the 3.6 of GFA, now all works.
This morning, i have sometime crash of 3,5 GFA with CE_DD enabled or microCosmos connected.
Is not problem of CE_DD.

Thanks
Olivier

Hi,

My config:
TT 030 4/32MB TOS 3,06 FR
HDDRIVER 10.02
Boot on CODE/SRC (SCSI2SD)
MicroCosmos
Xboot

If i enable CE_DD (in XBOOT), and launch GFA 3.50 and F1 for load i have crash and return to GEM.

I am the only one with this problem?

Thanks
Olivier

Hi,

i have recieved the stencil and PCB 100x55mm.


Bye
Olivier

Hi, I have recieved FRAK-2 PCB, but the PCB as not printed overlay on both side and manual is not up to date. I have create the overlay with PCB on back ground and BOM for easy assembling FRAK-2: FRAK-2-TOP OVERLAY.jpg FRAK-2-BOTTOM-OVERLAY.jpg For BOM and More quality you can download here: http://...

Hi Foxie, Replay 16, as special IC (programmed) and not part number writed on IC. Is search Replay pro, but is very rare. I use this service for stencil https://jlcpcb.com/ for 9$ the stencil is stainless steel, for 290x190mm valid area. I can place multiple design on stencil. Others size aviable ea...

Hi, I create many PCB in SMD (http://www.gossuin.be) in small quantity. I use stencil and oven (size 10x10cm) for soldering, the stencil is low cost 9$. I limit the size at 0805, for ic i have not limit but not BGA, but is more easy is the chip is soic or tssop. But is PCB as components in both size...

I use Da Vinci 1.0A from XYZprinting. It's plug and play printer, no time to loose for assembly the printer. It's not perfect printer, but a this price is good. Just the price of ABS cartridge, but sometime i found at lower price. My brother as Ultimaker 3, the printing is very more good, but the pr...

It's an idea too, but it's a lot of haggling.
As I sell this 5 euro + shipping .....

There will be a new batch soon (but now is the Chinese new year) The Floppy is powered from external power supply. DB9 would be nice, but those are on keyboard and would need long wire... It could be splitted from the keyboard connector, but that needs crimping connectors and splitters and stuff --...

I made other adapters:
Monochrome / color switch:

Monochrome only:

and the problem is the same.
If I plug in another screen it works.

Hi,

today i have recieved the monitor DELL U2412Mc, i have other forum works in 15khz.
It's true, now i can display the medium and low resolution with the switch:


but the monochrome not supported (OSD message), it's first monitor not accept


Thanks
Olivier

mpattonm wrote:you are reinventing the wheel here

Yes, but with less radius

but i replace the AVR by switch.

I move away from the original idea, but the result is the same in the end, I can go from color to monochrome.

Hi, I found why i have many problem of stability. The 12V on DIN 13 it's very limited in current, in schematic of 1040STE the 12V is in serial with 1.2K resistor, the max current is 12/1200 = 10mA. With led, the current is to big. I have started this project because the assembly cable on web (eBay) ...

I have found this list for 'modern' VGA 15khz: http://15khz.wikidot.com/ but, i have launch research in distributor monitor =>17" max price 200 euro end user. Not exist, i have check over 200 monitors type/model. the minimum is 24Khz. Now the solution is use scan doubler. Any use this solution ...

Yes, sell the MK6 version, normaly assembling and testing this week-end.

Thanks
Olivier

I have read the new licence.
I try to cancel the PCB production.
If not possible i remove manualy the printed text.

Sorry.
Olivier

I'm stupid, I do not check the regulator's sense. With the 7805 (TO220) the input is on the left, with 78L05 SOT89 it is reversed. (The manufacturers do not simplify our life).

I have only 3V, probably the AVR not write in eeprom at this voltage.

Sorry for disturb.

Thanks
Olivier

OK, i try to disable the store delay for testing.

Small list of monitors color resolution not works (only monochrome works):
Viewsonic VG712s
Viewsonic Vx924
Viewsonic VG721m
Viewsonic VG930m
Viewsonic VA903m
Samsung SyncMaster 910n
Philips Brilliance 220SW
iiYama Prolite H430

Thanks
Olivier

I have same result with original code, but i see in code "saveTime 2000000"
i nedeed to press 2 second for save ?

What the value of state in monochrome and color ?

I have tested with add: EEPROM.write(2 , 2); it's works, the value is stored in eeprom at address 2

Thanks
Olivier