The Sinclair QL Forum

this will not work if I compile it since QLIb does not support PARSTR$ or PARNAM$ As TT has written in the TK2 manual. You should read it! I'm afraid I don't understand your comment. I have read both TK2 and QLiberator manuals. TK2 manual in my opinion does not address compiled code and PARSTR$. QL...

Hi, this might be an incredibly stupid question but for the life of me I can't figure out if it is possible to implement optional parameters in SuperBasic. What I mean is something along these lines: def proc foo(bar$,goo$) REM This I don't know how to do: if is_empty(goo$) then goo$="default v...

Well, I tested continuity from all the pins to the PIC or the 74238 according to the schematic and they are all fine. Measured the oscillator with a scope and it produces the correct clock but it's a wee bit unstable. Statistics on the scope showed std dev of 17kHz on the approx 14.5MHz clock. Not s...

You might want to test the conductivity of the tracks from the IPC socket pins to the other components on the PCB. Thanks Derek, I did a visual inspection but will do a continuity test with a multimeter. To reflash the Superhermes rom code, will be hard due the code not being available. yeah, and t...

tofro wrote:Yes, it's a PIC 17C42 on the SuperHermes - But it doesn't have flash memory, but OTP (one time programmable) EPROM. When the program is gone, it's done with. (Data sheet is here).

I'd first check whether the chip still has some signs of life (clock, port outputs).

Thanks Tobias, I'll do that!

I'll pull it out of the drawer tomorrow and identify the part that does the job of the 8049. That part. It was programmable, and lost its program. You mean the PIC17C44, Dave? It has an EPROM for the code. I guess it's possible that in 27 years it might fail. I was thinking of verifying with a scop...

Pr0f wrote:do you have a standard ipc or hermes just to confirm the issue is not elsewhere?

Yeah, QL works fine with the standard IPC

It doesn't announce itself with any ROM banner - so you won't see it like you do other add in cards. Problem is, I only see Minerva logo, not the "Press F1/F2", etc. messages. And with regular ROM I just see an empty screen. My hypothesis is that initialization hangs because communication...

Thank you Derek, I don't know why I didn't realize the print and non-print version have different contents! Feeling very stupid at the moment!

You wouldn't happen to have any "usual suspects" candidates to inspect?

Cheers,
Petri

Hi, years ago I bought a SuperHermes from Ebay and promptly forgot about it. Today I tested it in the black box and it does not work. With Minerva, I see the logo but nothing else. I have checked for broken/bent pins but don't see any. The caps on the board look ok on visual inspection. Can't find a...