Search found 69 matches

by stephen_usher
Sun Jul 28, 2019 11:43 pm
Forum: Software & Programming
Topic: Looking for Metacomco Languages
Replies: 13
Views: 643

Re: Looking for Metacomco Languages

retro_collector wrote:Steve,

Thanks for that. How do I convert the .IMG back to a real floppy on my QL?

Thanks Bill


Under Linux or macOS you'd use 'dd if=metacomco-c-ql.img of=/dev/whatever-the-floppy-device-is' (when using a root shell).

On a Windows machine you should be able to use rawwrite or similar.
by stephen_usher
Sat Jul 27, 2019 9:00 pm
Forum: Software & Programming
Topic: Looking for Metacomco Languages
Replies: 13
Views: 643

Re: Looking for Metacomco Languages

Here's a floppy image containing Metacomco C Development Kit http://www.lingula.org.uk/~steve/downloads/metacomco-c-ql.img I wrote on the label: "Metacomco C: Compiler, Editor, Linker + Headers" Of course, to use it you still need the contents of the dongle ROM. P.S. I also have both the C...
by stephen_usher
Tue Jun 25, 2019 7:04 pm
Forum: Software & Programming
Topic: Hardware pointers and cursors.
Replies: 30
Views: 2221

Re: Hardware pointers and cursors.

Basically a hardware cursor is effectively a single hardware sprite. It's drawn on a graphics plane above the "background" normal graphics plane and composited on top by the graphics chip for the output. Not only does it have the benefit that the underlying graphics software doesn't have t...
by stephen_usher
Sun May 26, 2019 9:41 am
Forum: Hardware
Topic: Help, connecting QL to BBS
Replies: 26
Views: 1680

Re: Help, connecting QL to BBS

The QL serial port also can't generate a BREAK signal (set the TX line high for a certain length of time). I had to simulate this in my terminal emulator by setting the baud rate to the lowest and then send 64 NULs and hope that the system it's connected to mistake this to being this signal.
by stephen_usher
Sat May 25, 2019 1:55 pm
Forum: General QL Chat
Topic: What makes the OS for QL any better, different, unique ?
Replies: 24
Views: 2102

Re: What makes the OS for QL any better, different, unique ?

Also look at MS Xenix (was it the name ? I do not remember correctly) : total failure. Xenix was supposed to be MSDOS 3 but was killed by it not being backwardly compatible with MSDOS 2 and hence didn't run Lotus 123. At the time business wouldn't buy anything which didn't run that spreadsheet as i...
by stephen_usher
Thu May 16, 2019 8:23 am
Forum: Software & Programming
Topic: TTY ANSI Terminal
Replies: 12
Views: 1126

Re: TTY ANSI Terminal

Hi, It works, I realised that serial `ttyS1' has to be respawned using `getty' (get tty on serial line). These settings works here with `terminal-3-53' defaults. 2400 SER2IR XON/OFF $ stty -F /dev/ttyS1 2400 cs8 cstopb cooked -crtscts echo $ /sbin/getty -L ttyS1 vt52 # needs root priviledges I wish...
by stephen_usher
Mon May 13, 2019 10:34 pm
Forum: Software & Programming
Topic: TTY ANSI Terminal
Replies: 12
Views: 1126

Re: TTY ANSI Terminal

tcat wrote:Hi Stephen,

I have discovered your sources here, I may try to assemble. I noticed the assembly makes use of local labels.

https://www.earth.ox.ac.uk/~steve/software/terminal/

Many thanks
Tom


Oh! I'd forgotten that I'd made that page!

:-)

I used the Computer One assembler and linker.
by stephen_usher
Mon May 13, 2019 9:09 pm
Forum: General QL Chat
Topic: What makes the OS for QL any better, different, unique ?
Replies: 24
Views: 2102

Re: What makes the OS for QL any better, different, unique ?

Although the QL came earlier than ST and Mac, the multitasking scheduler was already preemptive - technologically superior to the cooperative multitasking of the other machines, where every program could block the whole system. One moment... Neither the original Macintosh nor the Atari ST have had ...
by stephen_usher
Mon May 13, 2019 9:00 pm
Forum: Software & Programming
Topic: TTY ANSI Terminal
Replies: 12
Views: 1126

Re: TTY ANSI Terminal

If I could get the source and binary off one of my QL floppies I could send you my VT52+T4010 terminal emulator. I wrote it back in 1988. It actually emulates the University College London BBC terminal emulator, including extensions to program the function keys via *FX commands. :-) I've a USB flopp...
by stephen_usher
Mon Apr 08, 2019 10:19 pm
Forum: Hardware
Topic: RGB to SCART Video * solved *
Replies: 17
Views: 1488

Re: RGB to SCART Video * solved *

You could think of the TTL signal as a three line parallel digital signal but that's not how the TV/monitor sees it as it's treated as three sets of analogue signals. These are then put through an A-to-D converter. Scan line synchronisation could be an analogue circuit like old monitors or it could ...