Search found 2351 matches

by sweh
Thu Feb 25, 2021 9:49 pm
Forum: 8-bit acorn emulators
Topic: beebem reload disk image
Replies: 10
Views: 292

Re: beebem reload disk image

I just do "ALT-F E" ("rEset" on the File menu) and that appears to reload the disk image just fine.
by sweh
Sun Feb 21, 2021 1:08 pm
Forum: off-topic
Topic: Electric Cars - A general discussion platform
Replies: 57
Views: 1081

Re: Electric Cars - A general discussion platform

1024MAK wrote:
Sun Feb 21, 2021 3:57 am
Heating loads are the worst as far as grid operators are concerned. Because often demand increases across the board, as many homes demand more power all at the same time. And that can happen NOW.
Also see "TV Pickup" - https://en.wikipedia.org/wiki/TV_pickup
by sweh
Fri Feb 19, 2021 1:55 am
Forum: 8-bit acorn hardware
Topic: BBC Micro continuous beep diagnostics
Replies: 3
Views: 170

Re: BBC Micro continuous beep diagnostics

If you can burn an EPROM then check out this thread: viewtopic.php?p=123534
by sweh
Thu Feb 18, 2021 3:16 pm
Forum: general
Topic: Have you ever had one of those Hot-Collar moments?
Replies: 13
Views: 330

Re: Have you ever had one of those Hot-Collar moments?

5 years I wiped out the MBR on all of the disks on my not-a-server... 8*4TB, 4*2TB, 2*512G and an external 1TB... all wiped out.

https://www.sweharris.org/post/2016-02-10-break-mbr/
by sweh
Tue Feb 16, 2021 12:53 am
Forum: 8-bit acorn hardware
Topic: Forty years ago...
Replies: 77
Views: 2309

Re: Forty years ago...

cardboardguru wrote:
Tue Feb 16, 2021 12:40 am
I recall there was a review of the Newbury Newbrain in Personal Computer World magazine. Or more probably a preview, I doubt it was available to buy.
Didn't they sell it to Grundy; I recall a Grundy Newbrain from BITD.
by sweh
Mon Feb 15, 2021 5:58 pm
Forum: 8-bit acorn software: other
Topic: Identify ROM XBL 2.2
Replies: 5
Views: 151

Re: Identify ROM XBL 2.2

Yeah my guess would be firmware for a printer; possibly an Epson LQ printer.
by sweh
Sun Feb 14, 2021 3:23 am
Forum: 8-bit acorn hardware
Topic: BBC + Master online (fork from ElkWiFi)
Replies: 13
Views: 764

Re: BBC + Master online (fork from ElkWiFi)

Alan00 wrote:
Sun Feb 14, 2021 3:18 am
I've replace my serial ULA with a ESP-8266, I'm using the 1MHz clock for timing so I have a fixed baud of 15625, no matter what baud rate you select.
Is this solution documented anywhere?
by sweh
Mon Feb 08, 2021 2:59 am
Forum: off-topic
Topic: Need some electronics advice...
Replies: 21
Views: 2705

Re: Need some electronics advice...

If I were wanting to control a solenoid using an arduino, I’d use a MOSFET transistor Well I wish I'd listened to this 2 years ago! It might have made life easier. I decided to revisit this solution using a wireless controller (NodeMCU 12E). I tested and the safe only attenuates the Wifi signal by ...
by sweh
Mon Feb 08, 2021 12:56 am
Forum: 8-bit acorn hardware
Topic: IFEL MMC/SD & Watford 5.25 floppy drive co-existence
Replies: 23
Views: 783

Re: IFEL MMC/SD & Watford 5.25 floppy drive co-existence

I would not modify the mainboard if you plan on keep using the Solidisk board, because that board already does additional address decoding for the extra ROM slots. It's probably decoding all 16 ROM addresses (at least the 2M128 does, between the combination of RAM and ROM).
by sweh
Thu Feb 04, 2021 12:41 am
Forum: 8-bit acorn hardware
Topic: IFEL MMC/SD & Watford 5.25 floppy drive co-existence
Replies: 23
Views: 783

Re: IFEL MMC/SD & Watford 5.25 floppy drive co-existence

Thanks for your offer - how do I post an image? Do I have to upload them elsewhere on the forum then link the url between the bracketed image folders or....sorry, it will soon be second nature.. :D When you're writing a message, underneath the text box is a tab marked "Attachments". You c...
by sweh
Sat Jan 30, 2021 9:02 pm
Forum: 8-bit acorn software: other
Topic: Help loading a .rom file on BBC Model B (I'm new to the BBC)
Replies: 9
Views: 308

Re: Help loading a .rom file on BBC Model B (I'm new to the BBC)

There are two "main" types of Solidisk SWRam boards. The earlier versions connected to the 6522 that controls the user port. These tend to look something like this ( http://www.computinghistory.org.uk/det/32469/Solidisk-32K-RAM-Sideways-Board/ ) and fit on the right hand side of the Beeb. ...
by sweh
Mon Jan 25, 2021 1:39 am
Forum: off-topic
Topic: Help with Linux
Replies: 62
Views: 2077

Re: Help with Linux

Check out https://medium.com/@dhanar.santika/installing-wsl-with-gui-using-vcxsrv-6f307e96fac0 - that explains how to use a window manager such as xfce inside the X server. I see VcXsrv has the option "-multiwindow". This _might_ (I've not used this X server on Windows) let each X window o...
by sweh
Mon Jan 25, 2021 1:29 am
Forum: 8-bit acorn hardware
Topic: Returning Beeb user looking for hardware assistance...
Replies: 17
Views: 801

Re: Returning Beeb user looking for hardware assistance...

I need to find out how to type the ~ symbol as the Beeb only brings up a divide symbol when I use that key. That is how the ~ symbol shows in MODE 7, the default mode. You can see the difference; type "MODE 7" then press the ~ key, then DELETE it. The "MODE 6" and press the same...
by sweh
Sun Jan 24, 2021 1:34 am
Forum: off-topic
Topic: Has My ISP Slowed Me Down?
Replies: 30
Views: 1425

Re: Has My ISP Slowed Me Down?

This is my speedtest results, using the CLI version of the "ookla" speedtest.net (I run it from cron, and throw the results into influxdb and let grafana draw pretty pictures).

The zero a week ago is when there was an overnight outage.

(Verizon FIOS, in New Jersey).
by sweh
Sat Jan 23, 2021 12:31 am
Forum: general
Topic: Recorded BBC Tape Wave File
Replies: 15
Views: 562

Re: Recorded BBC Tape Wave File

I don't know what it is, but it's definitely not a BBC Tape file!
by sweh
Mon Jan 18, 2021 8:16 pm
Forum: off-topic
Topic: Help with Linux
Replies: 62
Views: 2077

Re: Help with Linux

X11 allows for each program to know where to display. The usual default is :0 but it seems likely that WSL2 requires something more complex - specifically, an IP address with :0 appended - which is why the programs can't find their display. Perhaps see https://medium.com/javarevisited/using-wsl-2-w...
by sweh
Thu Jan 14, 2021 6:10 pm
Forum: software & utilities for the pc, mac or unix
Topic: Hex Dump Utilities
Replies: 9
Views: 379

Re: Hex Dump Utilities

Another fun program to install on Linux is "bvi", standing for binary vi. Allows you to edit binaries in hex mode or ascii mode
by sweh
Thu Jan 14, 2021 6:09 pm
Forum: software & utilities for the pc, mac or unix
Topic: Hex Dump Utilities
Replies: 9
Views: 379

Re: Hex Dump Utilities

For command line fans, this is my solution (if you don't want to use my perl scripts) #!/bin/sh if [ -t ] then cols=$(tput cols) fi cols=${cols:-80} if [ $cols -ge 80 ] then x=16 a=8 else x=8 a=4 fi case $1 in -16) x=16 ; a=8 ; shift ;; -8) x=8 ; shift ;; esac exec hexdump -v -e '"%0'$a'_ax &qu...
by sweh
Mon Jan 11, 2021 4:01 am
Forum: 8-bit acorn software: other
Topic: AWFS (Advanced Wifi Filing System
Replies: 8
Views: 783

Re: AWFS (Advanced Wifi Filing System

The WiFi board has 128kB RAM but I only want to use 64kB of it for disc caching because I also need memory for buffering the incoming data and the WiFi commands. The RAM is divided in two banks which are accessible as 256 pages at &FDxx. The first bank is used for buffering incoming data and the...
by sweh
Wed Jan 06, 2021 1:04 am
Forum: programming
Topic: Development workflow: moving data from PC to BeebEm
Replies: 9
Views: 474

Re: Development workflow: moving data from PC to BeebEm

On my Linux machine running a Windows VM I used the serial port version of the HostFS ROM and my TubeHost server; VirtualBox exposed the COM1 port as a socket on Linux and TubeHost connected to that. In this way files written out to the filesystem are immediately visible. I've not tested that on a W...
by sweh
Mon Jan 04, 2021 2:18 am
Forum: 8-bit acorn software: other
Topic: MMFS Version 2
Replies: 498
Views: 11602

Re: MMFS Version 2

Honestly I think renaming MMFS2/MMFS3/MAMMFS2/MAMMFS3/SWMMFS2 to be "MMFSa" "MMFSb" etc.

I don't foresee any "breaking" happening, and just a minor amount of confusion that can be documented.
by sweh
Sun Jan 03, 2021 8:36 pm
Forum: for sale / freebies
Topic: FS - IFEL 128k boards
Replies: 2
Views: 301

Re: FS - IFEL 128k boards

FWIW, I have this board in one of my machines ( documented at https://sweh.spuddy.org/Beeb/Ram_Rom/ ) and it works well.
by sweh
Fri Jan 01, 2021 11:06 pm
Forum: programming
Topic: Displaying a Message
Replies: 16
Views: 644

Re: Displaying a Message

My variation of this "print following message" (.pflmss 'cos of length limits of the assembler I used BITD) doesn't have the length limit 'cos it updates the ZP pointer instead of the index. Slower, but it works :-) .pflmss PLA STA temp5 PLA STA temp5+1 LDY #1 .pflmsl LDA (temp5),Y JSR OSA...
by sweh
Wed Dec 30, 2020 6:52 pm
Forum: modern implementations of classic programming languages
Topic: Options for embedding BBC BASIC code in URL
Replies: 16
Views: 437

Re: Options for embedding BBC BASIC code in URL

FWIW, this may help with practical limits: https://stackoverflow.com/a/812962/6569796

Hmm https://stackoverflow.com/a/417184/6569796 also indicates some CDN networks may restrict maximum URL sizes
by sweh
Tue Dec 29, 2020 5:31 pm
Forum: general
Topic: Raspberry Pi 400
Replies: 63
Views: 3360

Re: Raspberry Pi 400

Instructions for booting a Pi 400 from USB can be found at https://www.riscosopen.org/wiki/documentation/show/Raspberry%20Pi%20questions%20and%20answers#BootUSB - if you want any configuration changes to survive a reload you will also need to read https://www.riscosopen.org/wiki/documentation/show/...
by sweh
Mon Dec 28, 2020 10:59 pm
Forum: general
Topic: Raspberry Pi 400
Replies: 63
Views: 3360

Re: Raspberry Pi 400

Has anyone booted RiscOS from a USB stick on this thing? Since I have more spare USB sticks that microSD cards, I thought I'd try it. The machine starts to boot but then aborts with a "can't find disk" type of error and drops me into the "*" command prompt window. I can do "...
by sweh
Mon Dec 21, 2020 5:44 pm
Forum: 8-bit acorn software: other
Topic: .inf access byte question
Replies: 26
Views: 857

Re: .inf access byte question

Second with third as an option - definitely not first as it conflicts with existing stuff. I'm not sure I'd worry too much about compatibility with existing stuff. It's not clear how compatible existing stuff is with each other anyway. Maybe go with the tag/label format and just call it a different...
by sweh
Sun Dec 20, 2020 8:17 pm
Forum: 8-bit acorn software: other
Topic: .inf access byte question
Replies: 26
Views: 857

Re: .inf access byte question

I could have sworn I've seen "CRC" in .inf files before..? Also, the filename inside the .inf file is the filename that should be used when writing the main file to a disc-image. (I don't think that's controversial, is it?!) That is the bbcim format. The optional word "Locked" f...
by sweh
Sat Dec 19, 2020 1:15 pm
Forum: 8-bit acorn software: other
Topic: Why was BBC BASIC so fast?
Replies: 222
Views: 10864

Re: Why was BBC BASIC so fast?

dominicbeesley wrote:
Sat Dec 19, 2020 11:47 am
Sorry, mea culpa, I'd misremembered C64 BASIC as having integer variables by default.
It did, didn't it? CBM PET definitely did. And running Vice's c64 emulator seems to show it:
by sweh
Sat Dec 19, 2020 3:16 am
Forum: 8-bit acorn software: other
Topic: Why was BBC BASIC so fast?
Replies: 222
Views: 10864

Re: Why was BBC BASIC so fast?

My first machine was a Commodore PET 2001, and that had the same integer "%" variables so moving to the Beeb made perfect sense. Of course the PET only had 2 letter variable names, so "ABC%=10.123 : ?AB%" returned 10 :-)

Go to advanced search