Search found 436 matches

by Silvester
Thu May 19, 2022 10:03 pm
Forum: The Off-Topic Section
Topic: Today I Received...
Replies: 642
Views: 285749

Re: Today I Received...

Built this a few years ago using MC68681 (3 byte receive FIFO).
68681.JPG
Just picked up a bargain deal I couldn't ignore on 26 of SC28L92 (16 char FIFOs). :D :D :D
SC28L92.JPG
by Silvester
Thu May 12, 2022 4:23 pm
Forum: General QL Chat
Topic: Andy Pennell's books.
Replies: 96
Views: 20818

Re: Andy Pennell's books.

At least all the information is available not like that in the past, many information was closed to mere mortals, only God like being were granted access, or thats how seemed. Agreed, I could almost weep at the amount of mental effort I put into deciphering the binary just to understand a point whi...
by Silvester
Wed May 11, 2022 10:13 pm
Forum: Hardware
Topic: Upgrading Q40 to 68060 CPU
Replies: 72
Views: 11638

Re: Upgrading Q40 to 68060 CPU

The oscillator frequency can be 60.0 MHz or 66.0 MHz depending on jumper setting. For the 68060RC50A CPU you apparently had ordered, I would recommend 60.0 MHz. I don't have RC50A grade, I only have RC50 (for other project). I was going to get a RC66 (pending a RC75) , so I'll get 66.000MHz oscilla...
by Silvester
Wed May 11, 2022 9:46 pm
Forum: Hardware
Topic: Upgrading Q40 to 68060 CPU
Replies: 72
Views: 11638

Re: Upgrading Q40 to 68060 CPU

I was going to order suitable oscillator. I know the RC66 CPU is rated for 66.667MHz, but I was unsure whether logic is configured for 66.000MHz. Both speeds are available in DIP14 oscillators.
by Silvester
Wed May 11, 2022 8:33 pm
Forum: Hardware
Topic: Upgrading Q40 to 68060 CPU
Replies: 72
Views: 11638

Re: Upgrading Q40 to 68060 CPU

BTW what oscillator speed did you use for RC66, is it 66.666MHz or 66.000MHz ?
by Silvester
Tue May 10, 2022 10:07 pm
Forum: Software & Programming
Topic: Magnetic Scrolls Interpreter - Christmas Edition
Replies: 48
Views: 14085

Re: Magnetic Scrolls Interpreter - Christmas Edition

You might be surprised that each of the original pictures uses a palette of only 16 unique colours. I found the original pictures here Thanks I recall now that one of the problems I encountered with FS dithering was it over brightened JPEGs. So I added option to restrict dithering (\d0 to \d4), wit...
by Silvester
Tue May 10, 2022 5:16 pm
Forum: Software & Programming
Topic: Magnetic Scrolls Interpreter - Christmas Edition
Replies: 48
Views: 14085

Re: Magnetic Scrolls Interpreter - Christmas Edition

you can play the games in your browser https://msmemorial.if-legends.org/msa2/msa2.html#close and copy the enhanced pictures as gif 240x149 pixels to your computer Ah, but I'd have to be able to make progress into the game to do that :oops: I'm still trying to move the boulder blocking the North pa...
by Silvester
Tue May 10, 2022 2:09 pm
Forum: Software & Programming
Topic: Magnetic Scrolls Interpreter - Christmas Edition
Replies: 48
Views: 14085

Re: Magnetic Scrolls Interpreter - Christmas Edition

Well, they're packed (rather: concatenated with a small header) in the .gfx files. The format of those is (somewhat loosely) described in the "tech_txt" file on GitHub. The truth is (as always) in the code. Ah, I'd hoped that wasn't the case, thought the original images may have also been...
by Silvester
Tue May 10, 2022 1:47 pm
Forum: Software & Programming
Topic: Magnetic Scrolls Interpreter - Christmas Edition
Replies: 48
Views: 14085

Re: Magnetic Scrolls Interpreter - Christmas Edition

pjw wrote: :? The binary might be more intelligible to the like of me
Photon also used Floyd Steinberg 7/3/5/1 distribution : http://www.dilwyn.me.uk/graphics/photonsource.zip see process_asm (line 112 onwards).

BTW tofro, are the original raw images available? I had a quick search but never found them.
by Silvester
Mon May 09, 2022 4:40 pm
Forum: Hardware
Topic: Upgrading Q40 to 68060 CPU
Replies: 72
Views: 11638

Re: Upgrading Q40 to 68060 CPU

As I wrote earlier, I can also program the chips for you. I'm impressed that you invest the time to build a PLCC programming adaptor. I'm keen to have hands-on experience of tools/software. Breakout board for PLCC is also going to be useful for other projects (I also have programmer and some Xilinx...