Recent content by Wreck

Hello, My trustworthy 3032 developed several hiccups over the past months. Suddenly it wouldn't start, only with the help of the PET ROM/RAM board it would, but the Commodore text would be "wobbly" (with interference). The system has the original white sockets installed. Applying a bit of...

I was able to trace the machine back to his original owner; a certain Boris Eelzebub, it appears. I put in the replacement 901466-02 today, no difference when turning on. Checked all sockets again, still have SYNC LO on the 6502. Whenever I type in any LOAD command and execute, the center LED...

I was able to burn the 2732 from $C00 to $FFF, but no difference (actually it is worse now, as the drive motors won´t spin up at all). Also, 6502 PIN7(SYNC) is LO again...so back to square one. I will be getting a spare 901466-02 over the next few days, will see if this makes any difference. In...

Thanks Dave! I will try this afternoon. I am using an old GalepIII with software running under WIN98. Joe

Just out of curiosity; in a German service manual of the CBM the first troubleshooting step is to check the multiplexers (UD3/UE3/UF3) with the aid of a NOP tester. I just did and found UD3 PIN7(output) dead (no activity except 5V). But I guess I am jumping around, I will start with the RRIOT...

I am relieved regarding the capacitors. Regarding the 2732, I only programmed it once (so probably a mistake on my side), so I will try a 27128 (haven´t got any at the moment I think, so need to source). In the meantime I will try and figure out how to burn the 2732 four times; I haven´t used...

So to start with, I am building a simple NOP tester as follows (6502) Pin 33, 31, 29 to 21 (GND) and Pin 32, 30, 28, 27, 26 to 8 (Vcc) This will keep me busy for a while :-)

I have, essentially, used the following adapter, made by PCBWay. There is a difference in the (decoupling) capacitors used; Ruud Baltissen uses 220n whereas in the PCB Way description it says 100nf. I used the 901466-02.bin file from Zimmers. It is a 1kb file...

OK So I found some time and went on to continue with the CBM3040 troubleshooting. The RRIOT adaptor arrived from PCBWay yesterday, so I soldered one together today (a bit confused about the required capacitors value, hope I got it right). Also not too sure about the EPROM (I burned a 2732 with...

Unfortunately, I have very little time for my projects nowadays, but a small update; I made the little adapters to read the 2332 ROMs (UL1 and UH1), and the GCR ROM, results below; 901468-06(UL1, DOS1.0) The dump matches the file from Zimmers.net 901468-07(UH1, DOS1.0) The dump matches the...

Thinking about reading the ROMs, am I correct as follows; 2332ROM(901468-06)--->adaptor(2332-2732)--->read in EPROM Programmer This "business" about EPROMs is mind boggling :)

well spotted, absolutely :) 30 PRINT E,E$, T, S

OK so not much to do today, except that the CBM3032 developed a hiccup with the RAM, so had to drop in a PET ROM/RAM board. Also punched in the code below to see if there is any reaction; 10 OPEN 15,8,15 20 INPUT #15,E,E$,T,S 30 PRINT E,E4,T,S 40 CLOSE 15 The return yielded only "0", nothing else.

Happy Easter! Slowly having some success with programming the EPROMs; by using my old Galep III with old software I am able to burn TMS2532s with a 2732 adapter. I will try to burn some BASIC eproms and use them in the 3032 just to see if they work OK. Next step would be to read the EPROMS in...

I guess the only way to find out is to check the other ROMs. For now I need to consider acquiring a reliable EPROM programmer. Either all my stock 2532s/2716s/2732s are faulty or the programmer is...