Do me a favour, clear the board RAM by sys 59650,C. then
10 for I=36864 to 36870
20 poke I,0
30 next I
drop to the TIM
sys 1024
.m 9000 9200
check if the ram is 00 and FF or are there any other variations in the RAM contents...
Checking to see if this is real in RAM or interference
Where is that from? I checked my Pics of the original card and cannot find sich a bodge
From Mike Naberezny Flickr page - I never added that to the HR80 replica....not sure why it's there...
What bothers me is your startup screen when enabling the HR board is very different to mine. That is down to the RAM chips I am sure but all my boards shown the vertical fat lines and random dots between. Yous just shows a few dots which is very different. As if the RAM chips are initialising differently.
Not for the HR-40B from what I can see in my photos - this is the for the HR80 though not sure I wired that in.. need to check the photos more.
Sorry you having so many difficulties - I have found the HR-40B boards quite robust apart from that ribbon cable attachment to the board and the yellow clip touching other pins. I changed the ribbon cable to a socket and pin arrangement.
I have even desoldered one board to take photos of the bare board and re-installed all the iC's and it worked though the ribbon cable attachment is fiddly and prone to breakage if not careful.
The random noise on the screen appearing when you draw seems a 74LS issue perhaps or RAM issue. I cannot recall seeing that before. Will pull my HR-40B and replica board out again and fire it up to see if we can figure it out. However, I soldered all my 74LS IC's onto the board rather than use sockets.
Fired up the HR80 (in the SuperPET) yesterday and did a side by side with the HSG board (in the 4032) - used the hpgl image for the HSG and rescaled it
Alles anzeigenAlles anzeigenWas just wondering… my 4032 has got an ’80 board and works perfect with the eprom:
Can you post the exact Pin IDs for the wire? That could be a try!
But pin 3 of uc3 doesn’t look cut in the photo …
Alles anzeigenWas just wondering… my 4032 has got an ’80 board and works perfect with the eprom:
Interesting modifications… where those patch wires something you added or came with the board ?
Found the thread
Yours was an 80 column version … the fat-40 versions I have seen were mainly ending in assy ‘89 though I have one with ‘80 and has the offset character… you can try another manufacturer of Epsom to see if it resolves the issue and get lucky but I only succeeded with MOS character roms with that board.
Alles anzeigenAlles anzeigenIt could be the 74ls166 on the main board but if the board works without the supersoft installed probably not that.
Without HR40b it works fine. No graphics issue, the RAM looks also fine with the PETTEST2KV4...
Can you post picture of motherboard as it could be a universal MB not liking the character rom eprom being used …. In an earlier post I mentioned that I haven’t had issues with the version that has a metal box over the clock crystal …. Near the pieazo speaker …
Have you tried the eprom in the motherboard by itself ? the screen will be inverted but are the characters clear ?
Have you tried a different manufacturer of eprom ?
Sure it is the 8032080 without the metal box.
I checked the HR40b CR in the plain board, and it has the same issues:
If I swap back to Commodore Original, I have a clear picture... So in my understanding it just can be the EPROM, or the bin file.
I will test now another EPROM of the same model and then another model....
It’s the motherboard…. That version has issues with EPROMs as character roms …
I know there have been threads on why that could be nobody has found a solution. It’s not a hr-40b issue.
You need a later version of motherboard … like the ones ending with Assy number …. ‘89… or later . It’s a timing issue with the EPROM… why I don’t know but the universal 1 circuit is different to univ 2
It could be the 74ls166 on the main board but if the board works without the supersoft installed probably not that.
Without HR40b it works fine. No graphics issue, the RAM looks also fine with the PETTEST2KV4...
Can you post picture of motherboard as it could be a universal MB not liking the character rom eprom being used …. In an earlier post I mentioned that I haven’t had issues with the version that has a metal box over the clock crystal …. Near the piezo speaker …
Have you tried the eprom in the motherboard by itself ? the screen will be inverted but are the characters clear ?
Have you tried a different manufacturer of eprom ?
That looks like a bad contact with the character rom socket … silly question, have you tried pushing gently around the character rom area and does the screen change ? I have seen that when the character rom is not correctly seated or there is a broken pin.
Are the vertical lines there on boot up of the PET?
Can you post a picture of the motherboard also ? It could be the 74ls166 on the main board but if the board works without the supersoft installed probably not that.
Have you checked the 74ls’s are ok ?
I’ll post the hr-80 edit rom tomorrow …. You already got the hr-40b
Great it’s all working now …… there were some traps in the code I missed ….😊 all good fun
I figured out the original and think this may work also - if neither work then need to go into attack mode .... with the code
Can you Try enabling the board using the poke command as it seems I missed one of the latch commands - in the code its still $EFFF which is HR-40B and HR-80 but not that latch for the HR-40 which is $88B8 - thanks
Attached is with it corrected but not sure it that was the whole problem
Andy
OK - I have had to look at the HR-40B version and recompile for the 9inch using the disassembly listing. I really hope this works now.
Andy
Know where the issue is now but got to figure out how to resolve
Let me look again
OK - I haven't tested it as my PET is BASIC 2. But the issue with the other edit rom I believe was I didn't change the pointer to the lower addresses for the RAM/screen which is buried in the edit rom. This I have done. Why the drawing was all messed up.
Basic 2 = $E748 and Basic 4 = $E65B
I disassembled the Basic 2 Supersoft rom again, and converted it to Basic 4 - then recompiled the code and compared it with what i had done a few years ago and then pointer was the only thing that has changed. I hope now it will works.
Sorry for the oversight ..... this is for the HR-40 non CRTC board
Richi : photo of the ribbon cable connections to the hr-40b/80
Now waiting for correct Basic 4 Editor EPROM, and everything will come to a good end.
Working on it ….. though what you don’t like basic 2 😊😂 ?
Well done ... after it worked on two MB's for me must be 74LS related. Does Richi have any add-on Roms plugged in?
I think I have figured out what went wrong with the B4 version of the edit rom/supersoft for the 9inch. I think I have missed off a lookup table which is buried in the lower part of the edit rom
I can program in assembler …. Just got to figure out how to define custom characters and print them in assembler….. that’s been a while now.
Alles anzeigenDrawing works, I used my DB HPGL Reader and changed "!LINE x1,y1 to x2,y2" to "SYS 59650,SL,x1,y1,x2,y2" and here we go:
Only the inverted screen at startup and basic 4 incompatibility remains.
AND another sad story: HR40 3022/4022 screendump is a loadable program! But we do not have it, from what I could see.
So no Hardcopys on the good old printers.
Looks good, I tried to find the screen dump code but nothing exists …. Sadly
Could not be a thing with vertical refresh rates? AndyG yours is 50Hz, too, right?
I am in the UK so same mains frequency as Matthias ...
if you put in the original character rom - do you get a normal boot screen (inverted screen) ?
I just pulled the Char rom from the board and read the 2716 eprom - attached here but identical to what I posted previously
Alles anzeigen
Cap didn't change green screen problem.
When inserting the original CHAR ROM, behaviour is identical except inverted screen AFTER SYS59650,5.
Before (startup): Still green screen, black cursor- so NO inverting @startup!
What could cause that problem? Should be the only remaining one (ok, and it would be nice if it could work with basic 4).
I really don't know - its as if the character rom is not seen until the board is activated.
Mine was correct from the start. Can you sweep out the IC's with different ones to see if that has an effect ?
Apologies for the basic 4 - I will have to relook at the disassembly code to see what I missed as thought I caught everything.
I noticed something different on your photo - around IC13 you have a large capacitor - I just put in a 100nf cap. Not sure if that has anything but its a difference
Alles anzeigen
Ok, I try to explain the situation at the moment:
- BASIC 2 isn't working (maybe because I didn't change the editor ROM in the card
- BASIC 4 is showing me green screen with black cursor, no matter which plugs/cables are plugged in
- Card is working somehow, but starts drawing in the middle of the screen, green screen can be corrected with 59650,5
- Sockets in mainboard are the white ones- EXCEPT EDITOR AND CHAR-ROM! I already changed them for the card to precision sockets
- 3032 is running completely normal if card is deinstalled
WHAT can cause the green screen? The plug to video ram? NOPE, because it's always green screen when card is plugged into mainboard only in editor/char-ROM sockets.
So I think the problem MUST BE the card itself or the data in editor EPROM?
*edit* You were faster:
Can you show us the BOM from your HR40 card? Maybe there is one part (IC) different?I absolutely do not understand, why there is the green screen... it doesn't make sense, every part is soldered in correctly...
I noticed something different on your photo - around IC13 you have a large capacitor - I just put in a 100nf cap. Not sure if that has anything but its a difference
