ZX81X2.ROM - and the big bang

Anything Sinclair ZX Basic related; history, development, tips - differences between BASIC on the ZX80 and ZX81
Moggy
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Re: ZX81X2.ROM - and the big bang

Post by Moggy »

I think most of us are familiar with BASIC games creator Andre Baune and how he manages a fair turn of speed with his creations well I thought I'd try his Alien Mind a BASIC puzzle game, with the new fast ROM, and the speed increase is fantastic.

Try it and see. :D
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Andy Rea
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Re: ZX81X2.ROM - and the big bang

Post by Andy Rea »

Moggy wrote:
Mon Sep 24, 2018 9:45 pm
I think most of us are familiar with BASIC games creator Andre Baune and how he manages a fair turn of speed with his creations well I thought I'd try his Alien Mind a BASIC puzzle game, with the new fast ROM, and the speed increase is fantastic.

Try it and see. :D
Good stuff, I always liked this puzzler and have said many times I'd like to one day do a machine code remake... Well maybe I don't have to now 🤣

Regards Andy
AFK

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siggi
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Re: ZX81X2.ROM - and the big bang

Post by siggi »

Speed on ZxMore (incl. Wilf's WHY-WAIT mod.): 263,5% @ 3,25 MHz , 529.3% @ 6,5 MHz :mrgreen:

Andy: now its your turn using your 20 MHz Zeddy ....
My ZX81 web-server: online since 2007
http://zx81-siggi.endoftheinternet.org/index.html

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Andy Rea
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Re: ZX81X2.ROM - and the big bang

Post by Andy Rea »

siggi wrote:
Tue Sep 25, 2018 7:57 pm
Speed on ZxMore (incl. Wilf's WHY-WAIT mod.): 263,5% @ 3,25 MHz , 529.3% @ 6,5 MHz :mrgreen:

Andy: now its your turn using your 20 MHz Zeddy ....
i'll just put this here while i pick myself up off the floor !

Image
AFK

Moggy
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Re: ZX81X2.ROM - and the big bang

Post by Moggy »

Clever sod!! :lol:

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TMAOne
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Re: ZX81X2.ROM - and the big bang

Post by TMAOne »

Congratulations zsolt!

The YouTube has been removed for copyright reasons, unfortunately. I'd appreciate another.

When I get some time and a clear workbench :roll: I plan to take this baby out for a test drive. I'm thinking in terms of the Multi-ROM adapter discussed here: viewtopic.php?f=20&t=1006&hilit=Multi+ROM Haven't heard from the creator lately though. You still out there sascha2000?

Once again, way to go zsolt. An outstanding achievement.

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zsolt
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Re: ZX81X2.ROM - and the big bang

Post by zsolt »

Thank you for your feedbacks :D i am glad if you like it.
The video can be viewed again - without the soundtrack :cry:
Zsolt
ZX81 (8K), ENTERPRISE 128, [ZX SPECTRUM (48K,+,+128K,+2,+2A), TS1000, TS1500, TS2068, Cambridge Z88, PRIMO A64 (red)]

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siggi
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Re: ZX81X2.ROM - big bang confirmed

Post by siggi »

Yesterday I used my old "Merker Zeddy" to test my own patches of the ZX81X2 rom:

http://forum.tlienhard.com/phpBB3/viewt ... rker#p1488

This Zeddy has a "language" card, which allows to map RAM to 0K-8K to test a new rom (a new "program language") in RAM, before an EPROM is burnt. There I tested my own rom patches: the original ZX81X2 rom worked well, but not my patched rom.
While I was looking on my PC screen to find the error in the source code of my patches, the screen got black and the light went out (main 16A fuse blown out).
I disconnected the Zeddy from mains and was able to switch on the fuse.

To locacte the problem, I connected the zeddy again to mains. Then I heard the BIG BANG in the Zeddy's power supply and the main fuse has been blown out again :o

Currently I am testing my rom patches on ZxMore (where I can load new rom images easily into flash rom) :mrgreen:

Siggi
Last edited by siggi on Sat Sep 29, 2018 12:58 pm, edited 1 time in total.
My ZX81 web-server: online since 2007
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1024MAK
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Re: ZX81X2.ROM - and the big bang

Post by 1024MAK »

I wondered why the lights went a bit dim earlier... :lol:

Mark

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Andy Rea
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Re: ZX81X2.ROM - and the big bang

Post by Andy Rea »

So the new ROM is too powerful huh :mrgreen:
AFK

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