Search found 1932 matches

by sweh
Wed Aug 15, 2018 11:38 pm
Forum: emulators
Topic: Printer Emulation..(ie ESC P printer emulation)
Replies: 17
Views: 250

Re: Printer Emulation..(ie ESC P printer emulation)

At a first glance, the "epsonps" looks OK. Better than I expect! Would be interesting to see how well it handles longer results (eg is the page length correct).

escp2topbm... hmm. Maybe that'd work for something like PageMaker output? Probably would break with multi-pages, though.
by sweh
Wed Aug 15, 2018 10:33 pm
Forum: emulators
Topic: Printer Emulation..(ie ESC P printer emulation)
Replies: 17
Views: 250

Re: Printer Emulation..(ie ESC P printer emulation)

Also, on Linux, there's "escp2topbm" as part of netpbm-progs escp2topbm reads an ESC/P2 printer control stream as input. It pro- duces a PBM image as output. escp2topbm filters the raster graphic content from an Epson ESC/P2 printer control stream and writes the image it would print as a stan- dard ...
by sweh
Wed Aug 15, 2018 10:23 pm
Forum: emulators
Topic: Printer Emulation..(ie ESC P printer emulation)
Replies: 17
Views: 250

Re: Printer Emulation..(ie ESC P printer emulation)

Check out https://pd.spuddy.org/fs/source/usenet/compsrcs/misc/volume20/epsonps/ This is from comp.sources.misc from 1991 The program epsonps converts epson printer codes from an input file to PostScript. It is an excellent ASCII listing printer. Command line options are provided for auto linefeed, ...
by sweh
Tue Aug 14, 2018 2:16 am
Forum: software: other
Topic: Educational Archive online
Replies: 16
Views: 315

Re: Educational Archive online

I wonder if my game will ever show up again... My Mum was a teacher at a local infant school. I created a simple 'number block' game for her; it was a MODE 7 game that displayed two numbers in a sum with the relevant number of blocks, and the kids needed to count them to do the addition. Now I was a...
by sweh
Tue Aug 14, 2018 2:07 am
Forum: software & utilities for the pc, mac or unix
Topic: Matrix Brandy BASIC V for Linux with SDL: V1.21.9 released
Replies: 175
Views: 2730

Re: Matrix Brandy BASIC V for Linux with SDL: V1.21.9 released

Argh!!!! No no no no no no no! OSBYTEs <&80 take and return only ONE parameter. Don't break the API! Not strictly true, according to the AUG: OSBYTE &01 (1) *FX 1 Read/write the user flag Entry parameters: The user flag is replaced by (<old value> AND Y) EOR X i.e. Y=0 for write, Y=&FF for read On ...
by sweh
Sun Aug 12, 2018 2:08 pm
Forum: development tools
Topic: Deploy-and-run from PC to Beeb?
Replies: 26
Views: 487

Re: Deploy-and-run from PC to Beeb?

A bit of hacking around last night suggested to me that nobody has been using the Perl version on Windows. Windows would need to use Win32::SerialPort instead of Device::SerialPort, but there are other linux-specific Perl commands (use of stty, which apparently doesn't exist on Windows) in the UPUR...
by sweh
Sun Aug 12, 2018 1:33 pm
Forum: software & utilities for the pc, mac or unix
Topic: Docker & Acorn 101
Replies: 17
Views: 827

Re: Docker & Acorn 101

If it helps people understand some docker basics, I put together a few blog posts last year: What is a docker container -- https://www.sweharris.org/post/2017-06-18-buildcontainer/ Looking at how a docker container runs -- https://www.sweharris.org/post/2017-06-24-dockerrun/ Simple docker orchestrat...
by sweh
Mon Aug 06, 2018 3:17 pm
Forum: general
Topic: Which killer app made you buy a BBC?
Replies: 10
Views: 351

Re: Which killer app made you buy a BBC?

The built-in assembler :-)
by sweh
Wed Jul 18, 2018 2:27 pm
Forum: for sale / freebies
Topic: Worth Taking a Look At
Replies: 2669
Views: 220732

Re: Worth Taking a Look At

Spotted via twitter - not sure if someone else has already linked to it.

Tonne of stuff in Reading, including a Beeb - https://www.facebook.com/34115125608949 ... 359253709/
by sweh
Mon Jul 16, 2018 3:36 pm
Forum: hardware
Topic: 2nd User port for Beeb?
Replies: 98
Views: 6399

Re: 2nd User port for Beeb?

I did indeed design BeebSID to fit in to an already very congested and contested page $FC but it significantly pre-dates the second user port and the latter technically conflicts with existing legacy usage but there always has to be pragmatic thinking and compromise with these things. Yeah, I just ...
by sweh
Mon Jul 16, 2018 12:55 pm
Forum: hardware
Topic: 2nd User port for Beeb?
Replies: 98
Views: 6399

Re: 2nd User port for Beeb?

The two 74LS chips act as an address decoder, selecting banks of 32 bytes at a time. In the default configuration it uses &Fc00-&Fc1f but that can be changed by modifying one link. Not sure what addresses BeebSID are used at. As long as they don't conflict then they can both be used at the same time.
by sweh
Tue Jun 26, 2018 12:38 am
Forum: hardware
Topic: My Turbo MMC Misadventures
Replies: 35
Views: 921

Re: My Turbo MMC Misadventures

Confession... back in the day I used to use the "bottle opener" blade of my pen knife to remove ROMs. The rounded edge of the back of the blade made a nice lever against the motherboard. It looked something like this:
bottle-opener.jpeg
bottle-opener.jpeg (6.14 KiB) Viewed 345 times
I didn't bend too many pins, and never broke any :-)
by sweh
Tue Jun 26, 2018 12:21 am
Forum: emulators
Topic: When should keyboard interrupts be enabled during startup?
Replies: 7
Views: 640

Re: When should keyboard interrupts be enabled during startup?

1. Bootup. - Memory is cleared to 0, by a loop that hits here: Well, mostly. The zero'th byte of each page isn't cleared. This is because the OS initally writes RTI to &D00 so any stray NMIs return, and _then_ it cleans out memory...without clearing the RTI. See &D9CD, which is where (&FFFC) points...
by sweh
Mon Jun 18, 2018 1:10 pm
Forum: stardot.org.uk
Topic: Post Edits
Replies: 36
Views: 1390

Re: Post Edits

People will _always_ complain about changes, no matter how minor; That’s incredibly patronising Stephen and overtly implies that anyone who objects to this or any other change to the forum mechanisms isn’t capable of intelligent comment and argument. That you wrote this and also excluded the "chees...
by sweh
Mon Jun 18, 2018 12:35 am
Forum: stardot.org.uk
Topic: Post Edits
Replies: 36
Views: 1390

Re: Post Edits

I've never liked the traditional behaviour, but didn't care enough to complain or even comment on it.

People will _always_ complain about changes, no matter how minor; it's all about moving of cheese
by sweh
Sun Jun 10, 2018 3:17 am
Forum: programming
Topic: left and right brackets on beebem
Replies: 7
Views: 330

Re: left and right brackets on beebem

mode 8 seems to work. thanks for the help By default, the Beeb has MODE 0->7. Mode 8 would be the equivalent of mode 0. (There's a theoretical mode 8 documented in the AUG, which is achieved by direct programming of the video chips, but it's not a supported mode). With the Beeb, Modes 0->6 are bitm...
by sweh
Mon May 28, 2018 6:24 pm
Forum: archive requests
Topic: ROM based games by STL
Replies: 5
Views: 265

Re: ROM based games by STL

Rat Race appears to have been based on the STL "Sprite" ROM and "Tune" ROM (I don't see it on disks STL1-10, but I have a copy). Other than that, it's just a BASIC program copied into SWR. How does a BASIC program run from SWR given that the BASIC interpreter would be occupying the same address spa...
by sweh
Mon May 28, 2018 5:15 pm
Forum: off-topic
Topic: Forum GDPR compliance?
Replies: 58
Views: 1000

Re: Forum GDPR compliance?

Odd; I got the GDPR interstitial again today, despite having accepted it yesterday...
by sweh
Sat May 26, 2018 11:03 am
Forum: archive requests
Topic: ROM based games by STL
Replies: 5
Views: 265

Re: ROM based games by STL

Rat Race appears to have been based on the STL "Sprite" ROM and "Tune" ROM (I don't see it on disks STL1-10, but I have a copy). Other than that, it's just a BASIC program copied into SWR.

I've just checked all my disks and I don't appear to have anything else using the Sprite ROM.
by sweh
Fri May 11, 2018 12:08 am
Forum: off-topic
Topic: Need some electronics advice...
Replies: 20
Views: 897

Re: Need some electronics advice...

So I could buy 1 diode for around $1. Or I can buy 400 for $8.

I now have so many diodes I can rectify the world. (Hmm, maybe all of them together will rectify that Brexit idiocy?).

Hopefully I'll have time this weekend to try it out.
by sweh
Sun May 06, 2018 2:28 pm
Forum: off-topic
Topic: Need some electronics advice...
Replies: 20
Views: 897

Re: Need some electronics advice...

The transistor would work as a drop-in replacement for the relay, yeah. It doesn't prevent the need for the diode over the solenoid, though :-(
by sweh
Sun May 06, 2018 1:29 pm
Forum: off-topic
Topic: Need some electronics advice...
Replies: 20
Views: 897

Re: Need some electronics advice...

The initial link to my site goes into a bit more detail but, to make it simple, I wanted to replace the original (broken) controller board with an Arduino Nano. That'd let me do more "computer control" of the safe via a serial port. Because I was pretty sure the Arduino wouldn't be able to supply en...
by sweh
Sun May 06, 2018 1:30 am
Forum: off-topic
Topic: Need some electronics advice...
Replies: 20
Views: 897

Re: Need some electronics advice...

I can't tell what solenoid it is; it's very wrapped up ( https://www.sweharris.org/Safe/large/internals.jpg ). I can find lots of pictures, but I can't find any actual specs. I've seen some for sale on aliexpress claiming to be 6V 0.35A ( https://www.aliexpress.com/item/Solenoid-for-Safe-Lock-Compat...
by sweh
Sat May 05, 2018 9:28 pm
Forum: off-topic
Topic: Need some electronics advice...
Replies: 20
Views: 897

Re: Need some electronics advice...

Looking through my box of randomness, the only diode type I have is 1N914. I've also got a bunch 0.1uF 50V capacitors.

It's funny that two components, so small, can make such a difference :-)
by sweh
Tue May 01, 2018 4:11 pm
Forum: off-topic
Topic: Need some electronics advice...
Replies: 20
Views: 897

Re: Need some electronics advice...

I now have a weekend project :-)

Thanks!
by sweh
Tue May 01, 2018 10:19 am
Forum: off-topic
Topic: Need some electronics advice...
Replies: 20
Views: 897

Re: Need some electronics advice...

Thanks for the replies! If I understand correctly, then I should put a diode between VCC and GND on the input to the relay side, with the cathode on VCC and the anode on GND. That's easy enough. Similarly another one between ON and GND on the output of the relay. Should the capacitors be in the same...
by sweh
Mon Apr 30, 2018 11:23 pm
Forum: off-topic
Topic: Need some electronics advice...
Replies: 20
Views: 897

Need some electronics advice...

As previously mentioned, I used an arduino to replace a broken electronic safe controller and made it computer controlled instead: https://www.sweharris.org/post/2017-10-09-digital_safe/ The circuit design is pretty simple: https://www.sweharris.org/Safe/large/diagram.jpg But recently I've been havi...
by sweh
Wed Apr 18, 2018 10:38 pm
Forum: software & utilities for the pc, mac or unix
Topic: New Disk Image Editor
Replies: 76
Views: 3200

Re: New Disk Image Editor

I wonder if we can create something that's backwards compatible. I wonder how many tools currently read the _second_ line of the INF file? So we could have FOO_BAR load exec Locked V2 NAME:FOO BAR v2 aware code can look for the second line and if it's V2 then read the 3rd line for NAME: then use th...
by sweh
Wed Apr 18, 2018 2:02 am
Forum: software & utilities for the pc, mac or unix
Topic: New Disk Image Editor
Replies: 76
Views: 3200

Re: New Disk Image Editor

And you can put filenames in "" so e.g. a improvement could be something like this, which is invalid as regular inf, and thus utilities not updated for this will/should give an error message, but bbcim and other utilities could be changed to incorporate this in the next version and then do the righ...
by sweh
Mon Apr 16, 2018 12:46 am
Forum: other vintage computer hardware, software and games
Topic: A special day for a very special computer!
Replies: 13
Views: 906

Re: A special day for a very special computer!

I think you have to remember that, when it was released, the closest most people came to a computer was when they received their payslip, bank statement or telephone bill which had been printed by a mainframe. When I first saw a microcomputer, the ZX81's pre-decessor, the ZX80, it was the only comp...