Search found 1106 matches

by fordp
Fri Jan 15, 2021 4:45 pm
Forum: 8-bit acorn hardware
Topic: Z80 Protocol Decoder
Replies: 224
Views: 17268

Re: Z80 Protocol Decoder

hoglet wrote:
Fri Jan 15, 2021 2:24 pm
That's great, I've just given you write access to the Wiki.

Dave
Many thanks, Dave.

I have made a start and will add more as I go.
by fordp
Fri Jan 15, 2021 12:15 pm
Forum: 8-bit acorn hardware
Topic: Z80 Protocol Decoder
Replies: 224
Views: 17268

Re: Z80 Protocol Decoder

Hi, I would like to have a go with the protocol decoder to help with my ZX21 ZX81 Project (https://sinclairzxworld.com/viewtopic.php?f=6&t=3929). I am trying to get my sound chip working so I need to do some deep diving on ZX-81 operation. I would like to help improve the documentation on how to...
by fordp
Fri Jan 08, 2021 10:51 pm
Forum: 8-bit acorn hardware
Topic: Alternate universe: BBC Model C (64k, console)
Replies: 16
Views: 738

Re: Alternate universe: BBC Model C (64k, console)

This idea sounds like a 6502 Copro running machine code. They did make that and yes is was expensive!
by fordp
Thu Dec 24, 2020 4:56 pm
Forum: 8-bit acorn hardware
Topic: Pi-based Co-Pro on the cheap - 100MHz 6502 for £10? (now 290MHz)
Replies: 1325
Views: 182213

Re: Pi-based Co-Pro on the cheap - 100MHz 6502 for £10? (now 290MHz)

And on a different note, PiTubeDirect gets a mention in Issue 101 of the MagPi Magazine (page 26/27) https://magpi.raspberrypi.org/issues/101/pdf/download Dave I read this, very good. It would have been cool however if it had mentioned: 1) The Model A and Model B of the Raspberry Pi came from the B...
by fordp
Sat Dec 19, 2020 8:52 pm
Forum: acorn atom and acorn system series
Topic: Gerber files for Acorn Atom
Replies: 9
Views: 904

Re: Gerber files for Acorn Atom

I think Hoglet made a one-off replacement keyboard.
by fordp
Tue Dec 01, 2020 2:47 pm
Forum: 8-bit acorn hardware
Topic: Internet access via Kjell PiTube Direct?
Replies: 14
Views: 564

Re: Internet access via Kjell PiTube Direct?

A better option would be a Raspberry PI4 on the 1MHz bus using https://github.com/rsta2/circle and wired ethernet.

This would just be a starting point you understand. It would take lots of hours and good coding skills to make it do anything!
by fordp
Thu Nov 12, 2020 9:49 am
Forum: 8-bit acorn software: other
Topic: MMFS Version 2
Replies: 498
Views: 9440

Re: SD card without the MMB file (aka MMFS2)

Am I missing a trick here, or is SWMMFS missing from the MMFS2.SSD image? I believe a packaging issue crept into 1.48 (MMFS and MMFS2) where there is insufficient room on the .ssd files for all the builds. There is only room for 12 ROMs per .ssd file, and I think I may have exceeded that by adding ...
by fordp
Tue Nov 03, 2020 11:18 am
Forum: general
Topic: Raspberry Pi 400
Replies: 63
Views: 2946

Re: Raspberry Pi 400

Marvin wrote:
Tue Nov 03, 2020 10:40 am
We used to "manage" with computers with CPU's that ran in the hundred mhz and only had a few megabytes of ram.
We used to dream of one day having a megabyte, but you try telling that to the youth of today and they will not believe you!
by fordp
Sat Oct 10, 2020 10:43 am
Forum: 8-bit acorn hardware
Topic: HELP: BBC Model B fails to load from SD, tape or disc
Replies: 25
Views: 1154

Re: HELP: BBC Model B fails to load from SD, tape or disc

PA.is short for page. Just type PRINT ~PAGE at a BASIC prompt.
by fordp
Fri Sep 11, 2020 3:22 pm
Forum: 8-bit acorn emulators
Topic: MAME: Tube devices
Replies: 90
Views: 11606

Re: MAME: Tube devices

See https://github.com/mamedev/mame/blob/master/src/devices/cpu/ns32000/ns32000.cpp The code is much simpler and cleaner than the code that we started with in b-em. I like to think I improved it! I personally prefer using Enums for readability but then I am dyslexic. You can share the enums between...
by fordp
Fri Sep 11, 2020 3:02 pm
Forum: 8-bit acorn emulators
Topic: MAME: Tube devices
Replies: 90
Views: 11606

Re: MAME: Tube devices

I did some of the work on the 32016 SoftCore (with lots of work by Hoglet and others) it will be great if it makes it into Mame. I wonder if there are other 32xxx machines that will use the code? I wrote the 32016 disassembler for MAME about 18 months ago, but never actually implemented the CPU. It...
by fordp
Fri Sep 11, 2020 2:39 pm
Forum: 8-bit acorn emulators
Topic: MAME: Tube devices
Replies: 90
Views: 11606

Re: MAME: Tube devices

A little teaser: 0174.png An Electron with AP6 expansion, with AP3/4, AP5 cartridges, and 32016 co-processor. I did some of the work on the 32016 SoftCore (with lots of work by Hoglet and others) it will be great if it makes it into Mame. I wonder if there are other 32xxx machines that will use the...
by fordp
Sat Aug 15, 2020 6:28 pm
Forum: software & utilities for the pc, mac or unix
Topic: PyAcornDFS
Replies: 10
Views: 1192

Re: PyAcornDFS

I found a few more hours today to work on my little Python project. It now supports DSD files but it is done in an unusual way. In dsd files a track interleaved which makes them very different to ssd and mmb files as files can be split within the file where they use more than one track. So how do we...
by fordp
Wed Aug 05, 2020 2:32 pm
Forum: 8-bit acorn hardware
Topic: Beeb FPGA port to Spectrum Next
Replies: 108
Views: 12931

Re: Beeb FPGA port to Spectrum Next

And here's a challenge for programmers - what about if it could take one Pi and run both the Tube and 1MHz bus?! My initial thoughts were that it wouldn't be possible from a RPi GPIO pin availability point of view, but with a bit of cunning logic on the level shifter it might actually just be possi...
by fordp
Fri Jul 31, 2020 7:54 pm
Forum: 8-bit acorn software: other
Topic: AMX Pagemaker/Stop Press Documents
Replies: 1
Views: 199

AMX Pagemaker/Stop Press Documents

Hi,

If anybody has and Disks (SSD/DSD/MMB Format) with AMX Pagemaker documents I would like like a copy. I am looking at writing an extractor for a modern PC so you can view and print them again.

Many Thanks.
by fordp
Fri Jul 31, 2020 3:22 pm
Forum: 8-bit acorn software: other
Topic: Running AMX PageMaker Plus without Floppy Drive
Replies: 9
Views: 1038

Re: Running AMX PageMaker Plus without Floppy Drive

Sorry to jump in on this thread but does anybody have a Pagemaker work disk (SSD) with some DTP documents on they are willing to share. I want to add extraction to BMP so you can view/print them on a modern PC?
by fordp
Fri Jul 24, 2020 8:54 pm
Forum: programming
Topic: Is GOTO ever not evil?
Replies: 47
Views: 2237

Re: Is GOTO ever not evil?

I would say line numbers are the real issue goto label is way better.
by fordp
Fri Jul 24, 2020 8:48 pm
Forum: other vintage hardware, software and languages
Topic: Spectrum PCB foil delamination
Replies: 11
Views: 700

Re: Spectrum PCB foil delamination

My Spectrum 16K was like that from new. It had no impact on it working.
by fordp
Fri Jul 24, 2020 7:17 pm
Forum: software & utilities for the pc, mac or unix
Topic: PyAcornDFS
Replies: 10
Views: 1192

Re: PyAcornDFS

I have hopefully fixed the directory issue: PyDFS.png The program is now usable at least by me. Python is great to write and maintain but not so good to package and install. I will look into options to get this installed. I have tried it on both Ubuntu 20.04 and Windows 10. I think it works on both....
by fordp
Fri Jul 24, 2020 5:12 pm
Forum: software & utilities for the pc, mac or unix
Topic: PyAcornDFS
Replies: 10
Views: 1192

Re: PyAcornDFS

I have added another capability and the software can now de-tokenize BASIC-II programs. It still puts things in the same directory as the program. I will work on that in the near future. Thanks to the BEEBASM authors and Matt Godbolt for some examples to "borrow" from: (https://xania.org/2...
by fordp
Thu Jul 23, 2020 8:28 pm
Forum: 8-bit acorn software: other
Topic: Micronova Systems Limited PCB CAD
Replies: 11
Views: 1365

Re: Micronova Systems Limited PCB CAD

RobC wrote:
Mon Jul 20, 2020 6:50 pm
Excellent - that looks really good.
Just for context here is that board for real
IMG_20200723_202600.jpg
33 years old!
by fordp
Mon Jul 20, 2020 5:49 pm
Forum: software & utilities for the pc, mac or unix
Topic: PyAcornDFS
Replies: 10
Views: 1192

Re: PyAcornDFS

I have just realized "software & utilities for the pc, mac or unix" is a better place for this thread can an admin move it, please!!
by fordp
Sun Jul 19, 2020 8:04 pm
Forum: 8-bit acorn software: other
Topic: Micronova Systems Limited PCB CAD
Replies: 11
Views: 1365

Re: Micronova Systems Limited PCB CAD

IMG_20200719_200110.jpg
I found my mouse finally. It works and has a GUI on the BBC!
by fordp
Fri Jul 17, 2020 6:37 pm
Forum: software & utilities for the pc, mac or unix
Topic: PyAcornDFS
Replies: 10
Views: 1192

Re: PyAcornDFS

I found a few more hours and I think it does something now. It is still pretty rough and the only thing that works is extracting files from SSD or MMB and also making SSD images from MMB files. The extracting SSD images from MMB files was the main thing I wanted but I will hopefully get time to add ...
by fordp
Thu Jul 16, 2020 8:43 pm
Forum: software & utilities for the pc, mac or unix
Topic: PyAcornDFS
Replies: 10
Views: 1192

Re: PyAcornDFS

DFS.png
A bit more progress. It is still not useable. But it can display some information from within an SSD.

I have a busy weekend coming however so it may be while before I can make it actually useful.
by fordp
Tue Jul 14, 2020 8:23 pm
Forum: software & utilities for the pc, mac or unix
Topic: PyAcornDFS
Replies: 10
Views: 1192

Re: PyAcornDFS

I never got on with Perl I found it a write only language. This is in Python and will have a simple TK GUI. I want to make it so people can reuse and extend the code to do what they like. I started it because I needed it which is a good reason to write some code! I may have a useful version in a few...
by fordp
Sun Jul 12, 2020 7:27 pm
Forum: software & utilities for the pc, mac or unix
Topic: PyAcornDFS
Replies: 10
Views: 1192

PyAcornDFS

I have left off trying to Archive my 32016 Programs for now (My floppy died and I could not face taking it apart yet again). I now have both a FlashFloppy (Gotek) drive as well as my MMFS SD Card system. I thought I would knock some modern code to help to move between FlashFloppy and MMFS. I have wr...
by fordp
Sun Jul 12, 2020 6:57 pm
Forum: 8-bit acorn hardware
Topic: Pi-based Co-Pro on the cheap - 100MHz 6502 for £10? (now 290MHz)
Replies: 1325
Views: 182213

Re: Pi-based Co-Pro on the cheap - 100MHz 6502 for £10? (now 274MHz)

Is the right way to fix this to detect the language transfer and if the header isn't ARM just ignore the data being transferred.? This sounds correct. I would guess that all the official non-6502 CoPro's do have examples of best practice. I would guess you can reverse engineer what Acorn did on B_EM?
by fordp
Tue Jul 07, 2020 8:26 pm
Forum: 8-bit acorn hardware
Topic: Pi-based Co-Pro on the cheap - 100MHz 6502 for £10? (now 290MHz)
Replies: 1325
Views: 182213

Re: Pi-based Co-Pro on the cheap - 100MHz 6502 for £10? (now 274MHz)

The BAS135 used on the native CoPro does not use hardware floating point as stated above the source only supports FPA which is not available in modern ARM cores. The Raspberry Pi's support VFP floating point. The 32016 core does emulate the 32xxx FPU using hardware VFP. It is however not that fast d...

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