Search found 689 matches

by Martin A
25 Aug 2023 14:17
Forum: MFX
Topic: MFX mass-storage add-on - Original Thread
Replies: 127
Views: 168235

Re: MFX mass-storage add-on - Original Thread

Are you one of the lucky 3 ???
Lucky 3 ?
Lucky 3 ?
Img_4924-small.jpg (99.77 KiB) Viewed 24030 times
To help Dave out, I've just assembled 3 MFX boards, they're on their way back "up north" for chips and such to be added.

If you're not one of the 3, and might want one, poke Dave :)
by Martin A
29 Jul 2023 17:25
Forum: OFF TOPIC
Topic: Multicomp
Replies: 1
Views: 5163

Multicomp

On his MFX development pages, Dave mentions that I already had the FPGA board used in the MFX, which was originally running Grant Searle's Multicomp. http://searle.wales/ With the "production" MFX running using it's own FPGA for some time now, I finally got around to re-configuring origina...
by Martin A
07 Jul 2023 18:06
Forum: PROGRAMMING
Topic: A new old MTX ROM bug!?
Replies: 3
Views: 16654

Re: A new old MTX ROM bug!?

They say a picture is worth 1000 words, so ...
Example
Example
corrupt index.png (9.07 KiB) Viewed 16648 times

The indexed value stored at LABEL 2 was IX+#06.
What came up in the editor was IX+#00.

NB LABEL3 was originally IX+2 that was over written with IX+#00, that's the one originally reported to Jim. I forgot to screen grab that one!
by Martin A
04 Jul 2023 20:12
Forum: PROGRAMMING
Topic: Sound Engine & Midi Music player for the MTX
Replies: 28
Views: 100421

Re: Sound Engine & Midi Music player for the MTX

Wiki says .. https://en.wikipedia.org/wiki/MIDI that the Midi data rate is 31.25khz. That's 1MHz divided by 32, or 4MHz divided by 128. On the MTX the serial clock for the DART is generated by the CTC in counter mode. If the CTC were fed with 4MHz then 31250 baud could be done. But it's not the CTC ...
by Martin A
28 Jun 2023 10:02
Forum: PROGRAMMING
Topic: Kill off interrupts on the MTX
Replies: 8
Views: 15655

Re: Kill off interrupts on the MTX

gunrock wrote: 27 Jun 2023 23:31 What is Envosound? An old type-in music player from days of old?
It was the sound effects and music player used in Downstream Danger and Rolla Bearing
by Martin A
27 Jun 2023 23:23
Forum: PROGRAMMING
Topic: Kill off interrupts on the MTX
Replies: 8
Views: 15655

Re: Kill off interrupts on the MTX

So it looks like your second option worked, the 1st one did the same as the one I listed, basically did not seem to stop the interrupts. so for anyone looking for a quick and easy way to kill off interrupts for editing etc uses Bills method below. 10000 LET A=USR(2431) 10010 LET A=USR(2445) 10020 S...
by Martin A
19 Apr 2023 20:20
Forum: HARDWARE
Topic: GOTEK
Replies: 13
Views: 22679

Re: GOTEK

gunrock wrote: 19 Apr 2023 09:39 @Martin: dread to think what the wire side looks like!
Pretty!
You asked for it!
You asked for it!
wire side.jpg (134.84 KiB) Viewed 6103 times
by Martin A
15 Apr 2023 22:03
Forum: HARDWARE
Topic: GOTEK
Replies: 13
Views: 22679

Re: GOTEK

Ooh, nice job. So you created a custom PCB just for this project, Martin? A proper PCB or a one-off, breadboard? Derailling the Gotek thread a bit more :) , point to point soldered, one off, on matrix board. Pretty much the same way that CFX etc. were prototyped. I soldered some 0.1" strips so...
by Martin A
15 Apr 2023 10:31
Forum: HARDWARE
Topic: GOTEK
Replies: 13
Views: 22679

Re: GOTEK

Needing a bit of a clean, but otherwise complete. The prevoulsy FDX single is now a FDX CPM twin using 2 x Flashfloppy modified Gotek drives. The 5 1/4" bay adaptors were 3d printed as were the red end plates to match the function keys. The 80 column display is courtesy of a custom CPLD design ...
by Martin A
05 Apr 2023 21:27
Forum: HARDWARE
Topic: Help! (MTX512 Problem)
Replies: 9
Views: 9395

Re: Help! (MTX512 Problem)

Something I just remmebered, the colour of the VGA cursor changes with the system activity. Having just looked at Andy's VHDL to refresh my memory. Green is linked to the reset Red is linked to MISO, so will flicker if there's disc activity Blue is linked to the ROMS pin. So if the cursor is purple ...