Now.. what about these EPROMS on the FCU Extender boards? Peeking under the label we can see that these are M27C512 EPROMS and I have tools to read them.
There's also another chip labelled as FCU UT-15, but this turned out to be a PAL (TIBPAL20L8), which would require building custom hardware for dumping (though I already ordered some parts for it).
For now is skipped as the ROM in the CORE CPU board jumper "ON BRD ROM" jumper isn't set.
New video! I'm showing two (and a half) ways of getting the TL866 EPROM programmer to work in Linux.
YouTube: https://youtu.be/_oacXhtaLsk
PeerTube: https://makertube.net/w/kKdacAjugvbd6cDGyUSZew
#TL866 #EPROM #EPROMProgrammer #XGecu #MiniPro #Linux #LinuxMint #Wine #VirtualBox #Tutorial #HowTo #EPROMBurner
Using the TL866 EPROM Programmer in Linux
Found out my MiniPro TL866A maximum programing voltage for EPROM is somehow only 12V (measure from one of the two capacitors near the ISP connector after issue a write to "21V 2716 EPROM" from minipro's profile).
While I can use old Willem ERPOM 3.5 Programmer to program 25V ERPOM, it will require me to use my Windows XP PC that have parallel port on the motherboard, which are kinda in storage right now and not ready for use (too lazy to set it all up lol).
I have found forum post at https://www.eevblog.com/forum/testgear/modification-to-add-the-missing-21-and-25-volt-vpp-ranges-to-your-tl866ii-plus/ details how to add 21V or 25V EPROM support to TL866II Plus, also including TL866A.
The 10K resistor value for TL866A didn't work for my programmer as the voltage output are too low (about 18V), so, I have to modified the instruction a bit with these resistors added to a jumper connect to ground
- 5.6K to get 20.3V for 21V EPROM
- 10K (must also enable 5.6K) to get 24.4V for 25V EPROM
Below are the image of modification I did.
My TL866-II+ won't read EPROMs anymore using #minipro on #macos! Can someone confirm this? TTL logic tests still work. Installed using brew.sh!
There were no picture of the AOpen AX65 #PentiumPro board on #TheRetroWeb, so I did my best with my #fp5 and it turned out OK.
I then proceeded to remove the BIOS chip and dump its content with the #minipro.
Now, when dealing with motherboards where the BIOS has a sticker with its version on it, I never know if I should update it in place and make the sticker lie, or replace the EEPROM with a freshly flashed one instead and store the original.
Playing around with photos from a 2011 Sony Xperia Mini Pro edited in Analog Projects 3, a PC app. All pix taken this month.
#ShittyCameraChallenge #retro #photography #phonephotography #photoedit #Xperia #MiniPro #digital #LoFi
@Samdicide Taking a guess here... #Mac #MiniPRO :D
New blog post: Updating scan list
I want to close my AWA RT85 with some progress
Haven’t worked out the CTCSS module or frequency encoding yet
I can change the scan list to local repeaters
Got the updated repeater list from the WIA
Played with VLOOKUP in LibreOffice
Also, conditional formatting, but had to file a bug
Also copying the 2m FM call freq to […]
New blog post: Reflashing ATMEGA
Maybe I didn’t fry my ATMEGA328P, but just wiped it?
https://forum.arduino.cc/t/arduino-bootloader-for-atmega-128/131410/2
Bootloaders in ~/.arduino15/packages/arduino/hardware/avr/1.8.6/bootloaders/atmega`
Can’t program the old one
Can program the new one
Still can’t program it in the dev […]
New blog post: Updating channel memory on decommissioned AWA RT85 radio
I have an AWA RT85 2m radio, programmed for VK2 Ham channels. Now in VK7, I’m working on reprogramming it, by finding how and what to write to its EPROM.
https://blog.narf.ssji.net/2023/11/25/updating-channel-memory-awa-rt85-ham-radio/
#AWART85 #minipro #XgecuT48 #electronics #ham #hardware #µblog
I have an issue writing a diagnostic ROM to a NMC27C256Q. The minipro software throws an error.
#retrocomputing #minipro
And the T48 programmer I bought specifically cos it was the cheapest way (£36 shipped from AliExpress) to program the 22v10 won't do the 750c. I have to buy the t56 (about 3 times the price, as far as I can tell) for that.
Disappointing cos I've just spent most of the day writing the logic for it, and I reckon it would have worked.
There's a thread on the #MiniPro GitHub that suggests they might have got something working with some custom firmware. May give that a try.
The [IMSAI Guy] has posted a follow-up video with all the details of how he programs GAL22V10 chips in the modern era. We noted that this was missing from his stepper motor project a few days ago, and before we could even ask him, he answered. And no, you won't have to dig that old Intel 486 DX2-66 out of the closet and search eBay for working floppy drives. It turns out the answer is easier than you'd think.
Microchip now owns WinCUPL through its acquisition of Atmel in 2016, and offers WinCUPL as a free download from the Microchip website. This runs only in Windows, although some users report success running under Wine on Linux. This tool will compile the design, but you still need to program the chip. If you've done any EEPROM programming lately, chances are you have one of the TL866A MiniPros laying around -- this programmer can handle CPLDs, PALs, and GALS as well as EEPROMS. [IMSAI Guy] walks you through the programming procedure, and if you've programmed EEPROMs before, the process will be familiar.
For those who prefer the Linux or Mac environment, there are some alternatives. We've seen GALasm used on several projects such as [Ken Yap]'s 8085 Minimax. The GitHub repository for GALasm states that commercial use is strictly prohibited, so take note if this applies to your project. As for controlling the TL866A, there is a Linux port called minipro available on GitLab. The remaining hurdle if you want to experiment with these programmable logic chips it to actually get them -- many are now obsolete. But it looks like you can still buy Lattice and Microchip (Atmel) ones from various sources. Happy Programming.
#techhacks #gal #galasm #minipro #pal #palasm #tl866a #wincupl
