Lynx Computer

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daveejhitchins
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Lynx Computer

Post by daveejhitchins » Sat Mar 25, 2017 7:38 am

I may have a chance to obtain one of these . . .

Anyone know anything about them and worth (not that that's of primary interest!) etc. other than purchase price!

Dave H :D

Edit: Just thought I'd update this post . . . The offer very quickly evaporated :(
Last edited by daveejhitchins on Wed Nov 29, 2017 9:33 am, edited 1 time in total.
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RobC
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Re: Lynx Computer

Post by RobC » Sat Mar 25, 2017 9:36 am

I got one last year for about £100. They are fairly rare so it's hard to say what they're worth as they don't turn up very often.

It's fairly nice looking and the keyboard is quite good - it feels a bit like the Electron. The machine itself has some weird bank swapping mechanism that makes screen routines really slow. There are alternative ROMs that improve things though. Mine was the 48K version but I very quickly upgraded it to 96K as I had the memory ics to hand.

Here are some links that I found useful:
http://www.russelldavis.org/Files/files/CamputersLynx/
http://www.elborg.dk/

The memory upgrade instructions I used are here: http://www.russelldavis.org/Files/files ... ssue_4.pdf but note the warning in the next issue that the RAM chips need a 7-bit refresh. I bought an RGB cable off eBay and used that with an LCD TV.

Apart from upgrading the memory and fixing a couple of faults (the internal speaker was/is poorly mounted and came loose), I've not done much with it.

I haven't found much software for it but there was CP/M for the 128K model. However, if you've got the 48K or 96K model, I don't think it's easy to upgrade to 128K (as I think the 128 used a different motherboard). Also, the chances of getting hold of a disk interface must be really slim (but I think the circuit diagram is in one of the links if you fancied building one!).

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sydney
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Re: Lynx Computer

Post by sydney » Sat Mar 25, 2017 9:51 am


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oss003
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Re: Lynx Computer

Post by oss003 » Sat Mar 25, 2017 10:07 am

Looks like there wasn't much software written for the Lynx but you can find some here: http://ia801606.us.archive.org/zipview. ... _04_23.zip

Greetings
Kees

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daveejhitchins
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Re: Lynx Computer

Post by daveejhitchins » Sat Mar 25, 2017 2:43 pm

Thanks everyone . . . I'll let you know if it materialises.

Dave H :D
Parts: UM6502CE, GAL22V10D, GAL16V8D, AS6C62256A, TC514400AZ, WD1772, R6522, TMS27C512, AT28C256
Products: ARA II, ABR, ATI, AP6, MGC, AP5 . . .
For a price list, contact me at: Retro Hardware AT dave ej hitchins DOT plus DOT com

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jonb
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Re: Lynx Computer

Post by jonb » Sat Mar 25, 2017 4:12 pm

Dave

You could fit an IDE interface.

http://www.cpcwiki.eu/index.php/UIDE_Un ... _computers

..but you'd have to write a CP/M BIOS. Now that would be a challenge...

shock__
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Re: Lynx Computer

Post by shock__ » Mon Nov 27, 2017 10:32 pm

I know I'm a bit late to the party, but I repaired one of these machines last year and found it quite interesting - namely the machine being fully "off the shelf" parts and the BASIC having some unique quirks. Currently I have another around for repairs

The graphics are slow because the memory organization is quite unique and taking up a whooping 32k even in the 48k configuration (the ZX uses ~6K), the 32k are organized in 4 banks of 8k each, 3 for each red, green and blue channel and an "alternative green" which can be used as a kind of overlay. Graphic operations can be sped up considerably from BASIC by "locking" individual banks. Due to the large amount of graphics RAM there is no attribute clash. If you remove the RAM daughterboard on 48K/96K machines you'll get a green background, making the color bank system quite obvious.

Jynx as an emulator is quite competent for "cross development" actually. The guy writing the emulator was working on a game last time I checked and I did a "small" BASIC intro/demo (422 lines) which I plan to submit to a demo party some time next year.

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jgharston
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Re: Lynx Computer

Post by jgharston » Tue Nov 28, 2017 12:35 am

jonb wrote:You could fit an IDE interface.
...
..but you'd have to write a CP/M BIOS. Now that would be a challenge...
Ok. http://mdfs.net/Software/CPM/SmallSys/
:)

Code: Select all

$ bbcbasic
PDP11 BBC BASIC IV Version 0.25
(C) Copyright J.G.Harston 1989,2005-2015
>_

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jonb
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Re: Lynx Computer

Post by jonb » Tue Nov 28, 2017 9:22 am

Heh heh, nice one JGH... ;)

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sirmorris
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Re: Lynx Computer

Post by sirmorris » Tue Nov 28, 2017 2:11 pm

All I remember about it is that you can have floating point line numbers in basic..

10.1 GO TO 22.3

crj
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Re: Lynx Computer

Post by crj » Tue Nov 28, 2017 6:20 pm

Well, I guess it saves implementing a RENUMBER command...

shock__
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Re: Lynx Computer

Post by shock__ » Tue Nov 28, 2017 11:44 pm

Nah, supposedly the original specification was that basic only knows one type of number ;)
I have to admit I excessively used floating numbers in my 'demo'.

Other quirks:
Lynx 96 has some built in sound effects (Laser, Zap), variables can only be a single character (it differs between upper- and lowercase) but can be 'stacked' as arrays.

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