Search found 1184 matches

by bwinkel67
Thu Jul 01, 2021 8:54 am
Forum: Hardware
Topic: QL-VGA v2
Replies: 67
Views: 16027

Re: QL-VGA v2

mk79 wrote:Without access to such a machine it's basically impossible for me to develop for it.
Dave just bought a working US QL, maybe you can work with him to see if he can figure out what's going on.
by bwinkel67
Wed Jun 30, 2021 11:52 am
Forum: Hardware
Topic: QL-VGA v2
Replies: 67
Views: 16027

Re: QL-VGA v2

That's what my board looks like...crazy US motherboards. I'm assuming this all had to do with FCC regulations?!?

Edit: Well, my RAM chips don't have those resistors across them...
by bwinkel67
Tue Jun 29, 2021 11:30 pm
Forum: Hardware
Topic: Mechanical "membrane"
Replies: 2
Views: 953

Re: Mechanical "membrane"

Someone on the forum was working on something similar. The issue, I think, is that those switches won't feel very responsive and/or last too long. The real issue is the way the keys are done themselves. I think Tedroid had actually shown a complete replacement were the top of the case had to be cut ...
by bwinkel67
Tue Jun 29, 2021 8:45 pm
Forum: Software & Programming
Topic: Digital C code gen
Replies: 10
Views: 2749

Re: Digital C code gen

Wow, lots of resources available. I had the Hendrix book back in the day...haven't looked at it in a long time but it is still sitting on my shelf.
by bwinkel67
Sun Jun 27, 2021 11:13 am
Forum: Software & Programming
Topic: Digital C code gen
Replies: 10
Views: 2749

Re: Digital C code gen

Well, the source code is available if you feel like digging more into the code generator. See Dilwn's page to find it. Tim I've looked at it...it's not the easiest to understand. I do have Hendrix book on Small C so I should take a look at it as it may do a better job since it does come with source...
by bwinkel67
Fri Jun 25, 2021 5:19 am
Forum: Software & Programming
Topic: Digital C code gen
Replies: 10
Views: 2749

Digital C code gen

Been playing around with Digital C 'SE' to see how well it does code generation. Already known of a few cases where it isn't optimal: the while loop in same form as for loop generates smaller code: i.e. for (i=0; i<10; i++) { } not same code size as i=0; while (i<10) { i++; } a boolean expression wi...
by bwinkel67
Sat Jun 19, 2021 4:52 am
Forum: Hardware
Topic: Microdrive data line format
Replies: 73
Views: 48351

Re: Microdrive data line format

Finally in 2017, after several PCB revisions, and once the manuals and install guides had been done, I thought I'd make a couple for enthusiasts :-) As it turned out, I had significantly underestimated the demand and with the continued interest, I'm still making both the ZX and QL vDrives today (ht...
by bwinkel67
Sat Jun 12, 2021 11:26 pm
Forum: Wanted
Topic: QL PCB
Replies: 2
Views: 4726

Re: QL PCB

I'm surprised you haven't gotten a response yet on your original post. Usually it's a bad chip that causes that, not a bad motherboard. Unfortunately I don't have enough experience with failures to give any insights. But best bet is to go to sellmyretro and buy a few replacement chips first (like th...
by bwinkel67
Thu Jun 10, 2021 11:31 pm
Forum: Hardware
Topic: GermanQL and composite signal
Replies: 2
Views: 1009

Re: GermanQL and composite signal

I don't know about the German models but the US ones only have monochrome composite out on the RGB DIN socket. Note that both US and German models also use DB-9 serial and joystick connector. Pin 1 on the RGB socket gives a 5 volt signal and no composite color out. Now it's easy enough to fix since ...
by bwinkel67
Sun Jun 06, 2021 7:53 pm
Forum: Wanted
Topic: Microdrive Label Template
Replies: 5
Views: 5803

Re: Microdrive Label Template

dex wrote:OK, try this one.
Contains templates for microdrives as well as for floppies.
Made by Louis Seidelmann 2011.
I didn't read your comment initially when eagerly opening up the PDF and was like "wow, that's a big cartridge." :-)