Search found 3055 matches

by jgharston
Tue Jun 19, 2018 7:30 pm
Forum: emulators
Topic: MAME: Acorn System
Replies: 12
Views: 346

Re: MAME: Acorn System

From your disassembly: BIT &0E21:BVS LFF6D :\ If key>='@' or no key pressed, skip past boot LDX #&04 :\ Normally SPACE-BREAK to boot Does this mean that if no key is pressed then &0E21 is &FF? Near enough. Documentation says: if bit 7 is set no key is pressed. If bit 7 is clear it is the keypress. ...
by jgharston
Tue Jun 19, 2018 4:28 pm
Forum: emulators
Topic: MAME: Acorn System
Replies: 12
Views: 346

Re: MAME: Acorn System

Similarly at power up does the Acorn DOS prompt appear without a disc in drive? Checking the code I believe it does. On Reset if no key is pressed it goes to the DOS prompt. If SPACE is pressed the disk in drive 0 is examined for the boot option and a BOOT file. The System 2 is not working as the C...
by jgharston
Fri Jun 15, 2018 6:47 pm
Forum: for sale / freebies
Topic: Moving House - Items to go
Replies: 21
Views: 612

Re: Moving House - Items to go

If nobody else has taken it, and Elminster can take it to Cambridge ABUG, I'll have the keyboard. Ta.
by jgharston
Fri Jun 15, 2018 6:45 pm
Forum: software & utilities for the pc, mac or unix
Topic: Acorn CP/M Formats
Replies: 5
Views: 136

Re: Acorn CP/M Formats

I've also uploaded the source for CPMFiler so you can see the comments and code structure:
http://mdfs.net/Software/CPM/Filer/
by jgharston
Fri Jun 15, 2018 2:35 pm
Forum: general
Topic: Acorn magazine collections question
Replies: 4
Views: 164

Re: Acorn magazine collections question

I have some gaps in my collection, I need to get around to typing it up.
by jgharston
Fri Jun 15, 2018 2:30 pm
Forum: software & utilities for the pc, mac or unix
Topic: Acorn CP/M Formats
Replies: 5
Views: 136

Re: Acorn CP/M Formats

http://mdfs.net/Docs/Comp/Disk/Format/AcornCPM Floppies: 256 bytes per sector (single) 512 bytes per sector (double) 10 sectors per track tracks count up side 0, then *down* side 1 3 reserved tracks - *always* single density 128 (single) 256 (double) directory entries 1024-byte (single) or 2048 (dou...
by jgharston
Thu Jun 14, 2018 10:44 am
Forum: hardware
Topic: Plus 1 and AP5 new issue.
Replies: 7
Views: 213

Re: Plus 1 and AP5 new issue.

What does *ROMS give you? Do you have a floppy disk interface plugged in? DFS disables itself if there is no floppy hardware present, I can't remember but ADFS may do the same.
by jgharston
Wed Jun 13, 2018 9:37 pm
Forum: software: other
Topic: Using BBC BASIC on a Homebrew Computer
Replies: 9
Views: 385

Re: Using BBC BASIC on a Homebrew Computer

So from what I can gather, I only need re-implement a small subset of the MOS or modify the source and it should at the very least run? I hope I'm not missing something important... Rather than modify the source, the simplest thing is to write a target-specific set of defines, particularly if you a...
by jgharston
Sun Jun 10, 2018 12:37 am
Forum: hardware
Topic: Floppy disc MOT program
Replies: 3
Views: 158

Re: Floppy disc MOT program

And the program has already been typed up.
by jgharston
Thu Jun 07, 2018 9:17 am
Forum: hardware
Topic: Gotek noob - trying to get beebug C to work on a datacentre
Replies: 49
Views: 650

Re: Gotek noob

I tried that thanks - C runs as a language ROM and is no longer available after *DTRAP. You only get BASIC. You could try *RAMTRAP which just disables DFS and leaves all other ROMs untouched: http://mdfs.net/Apps/Filing/RAMFS/ I'm surprised you're having trouble using C on non-DFS filing systems, i...
by jgharston
Wed Jun 06, 2018 5:20 pm
Forum: hardware
Topic: load from disc 1
Replies: 26
Views: 475

Re: load from disc 1

Back2skooldaze wrote:
Wed Jun 06, 2018 1:15 pm
when i type *EXEC !BOOT the light comes on the drive 1 top drive and then it flicks to drive 0 the bottom drive?
Looks like whever wrote the menu you are trying to run embedded a hardwired *DRIVE 0 in it, and needs beating around the head with a large clue stick.
by jgharston
Wed Jun 06, 2018 5:16 pm
Forum: other vintage computer hardware, software and games
Topic: Adopt Startdot for SWTPC!
Replies: 7
Views: 214

Re: Adopt Startdot for SWTPC!

Most of the documentation I dug through to work out 6800/6809 code and BIOS coding was SWTPC stuff. Interesting little machine.
by jgharston
Wed Jun 06, 2018 5:12 pm
Forum: hardware
Topic: ECONET WOES
Replies: 70
Views: 2985

Re: ECONET WOES

Do you: want to ask the file server what time it is on the file server? NetFS operation 16 - Read Date&Time ----------------------------------- result%=NetFS_Op(16, "") On exit: X%!4 current date X%!6 current time using BLib.NetFS : DIM ctrl% 127:X%=ctrl%:Y%=X%DIV256 DEFFNNetFS_Op(A%,A$):!X%=0:X%?1=...
by jgharston
Sat Jun 02, 2018 2:47 am
Forum: for sale / freebies
Topic: Having a clear out
Replies: 43
Views: 1126

Re: Having a clear out

BeebDOS please. :)
by jgharston
Sat Jun 02, 2018 2:43 am
Forum: upcoming and recent events & exhibitions
Topic: ABUG SOUTH 1 to 3 June 2018 (Hampshire) BOOKING THREAD
Replies: 125
Views: 6156

Re: ABUG SOUTH 1 to 3 June 2018 (Hampshire) BOOKING THREAD

Awe boo! I was presenting my accounts and treasurer's report this evening, would have much prefered to be Beeb-fiddling. ;)
by jgharston
Sat Jun 02, 2018 2:39 am
Forum: emulators
Topic: Econet for Arculator (and other emulators)
Replies: 8
Views: 440

Re: Econet for Arculator (and other emulators)

Call me crazy, but it would be nice to have an emulator-agnostic "podule emulation API" so that once a podule emulation has been written for one emulator, it can be used with another emulator just by copying the precompiled podule DLL and a few configuration files to the right location. Exactly wha...
by jgharston
Fri Jun 01, 2018 3:51 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG SOUTH 1 to 3 June 2018 (Hampshire) BOOKING THREAD
Replies: 125
Views: 6156

Re: ABUG SOUTH 1 to 3 June 2018 (Hampshire) BOOKING THREAD

Sorry I couldn't make it. I already needed to be in two different places this weekend, trying to be in three places at once would have been stretching it.
by jgharston
Fri Jun 01, 2018 11:44 am
Forum: software: other
Topic: Commstar II
Replies: 6
Views: 181

Re: Commstar II

Back in the 1990s I wrote XTerm and I was using it to send/fetch email via Arcade until about 2010.
f2=set baud rate, f7=MODE 7, f8=MODE 0
by jgharston
Mon May 28, 2018 12:10 am
Forum: stardot.org.uk
Topic: Image sizes
Replies: 59
Views: 713

Re: Image sizes

I've been trying to get https working on mdfs.net, but something's not right as it comes up with "insecure site: self-signed certificate". At some point I/somebody/gremlins killed uploading images to the Wiki, and I've been prioritising that at the moment.
by jgharston
Sat May 26, 2018 1:13 pm
Forum: stardot.org.uk
Topic: Image sizes
Replies: 59
Views: 713

Re: Image sizes

I process my images to 640x480 and that seems clear and distinct enough to see what's being show, eg:
Image

What would be nice is to get the width=xx% attribute working.
by jgharston
Fri May 25, 2018 2:54 pm
Forum: off-topic
Topic: Forum GDPR compliance?
Replies: 58
Views: 842

Re: Forum GDPR compliance?

Somebody demanding that an event be removed from history gives me the collie wobbles. My inclination is to ask: ok, lend me your time machine and advise when I should travel to to stop you causing that event to happen. If on 23rd Feb 2018 Fred Jones said Boo! then on 23rd Feb 2018 Fred Jones said Bo...
by jgharston
Fri May 25, 2018 10:09 am
Forum: hardware
Topic: Watford solderless ROM Board and GoSDC?
Replies: 1
Views: 131

Re: Watford solderless ROM Board and GoSDC?

Does the Watford solderless SW ROM board work together with a GoSDC (which I assume would need to go into one of the two slots not covered by the Watford board). Or does the Watford board ‚lock out‘ the mainboard sockets? From memory the motherboard sockets become sockets 0,1,2,3 with the ROM board...
by jgharston
Fri May 25, 2018 10:03 am
Forum: off-topic
Topic: Forum GDPR compliance?
Replies: 58
Views: 842

Re: Forum GDPR compliance?

Due to a lack of interest last year I ended up on my parish council's Finance Committee which has been going through the GDPR stuff. I've just had a quick skim through our stuff and for StarDot the main questions are: * do we hold personal data on more than 5000 people? * do we use that data to send...
by jgharston
Fri May 25, 2018 9:38 am
Forum: off-topic
Topic: Forum GDPR compliance?
Replies: 58
Views: 842

Re: Forum GDPR compliance?

Elminster wrote:in a castle somewhere with man eating crocodiles and a grumpy troll.
Are the crocodiles tasty? ;)
by jgharston
Fri May 25, 2018 9:37 am
Forum: software
Topic: Nested archives in SparkFS
Replies: 4
Views: 201

Re: Nested archives in SparkFS

The only drawback is that some of the applications I’m transferring contain spark files (/zip or /arc) of their own. If I compress the application as the same file type (zip or arc) as the spark files contained within that application, then when I subsequently open the archive SparkFS also decompre...
by jgharston
Thu May 24, 2018 11:57 am
Forum: hardware
Topic: Testing the serial port
Replies: 3
Views: 184

Re: Testing the serial port

1024MAK wrote:Loop TXD to RXD, and CTS to RTS.
Then use any terminal software program.
I think JGH has a BASIC program somewhere on his site.
If the port is working, the screen should echo everything that you type.
SerTester
by jgharston
Wed May 23, 2018 7:06 pm
Forum: hardware
Topic: SpectROM - Speccy emulator for the Pi co-pro
Replies: 153
Views: 7146

Re: SpectROM - Speccy emulator for the Pi co-pro

I investigated the command line issue on various ARM platforms and documented them on the WIki.
by jgharston
Tue May 22, 2018 9:38 pm
Forum: hardware
Topic: GOTEK and ADFS Issue
Replies: 14
Views: 540

Re: GOTEK and ADFS Issue

I've recently dusted off some old Goteks and given them a new lease of life on my BEEB. I've flashed them to the latest version of flash floppy (v0.9.19a) and I can now successfully read .SSD and .DSD - success! However, the problem is, I cannot read ADFS .ADL images. If I select an .ADL file, get ...