Sinclair ZX80 / ZX81 Forums

I thought it might be useful to start a thread where we can list all of the software which supports hi-res Graphics on the ZX81 and the hi-res scheme used. It will form an update to the list at: http://www.pictureviewerpro.com/hosting/zx81/fredn.htm and dispel the myth that ZX81 graphics are all low resolution and boring.

So far as I understand, the different schemes available are:
Memotech HRG Interface
Memotech UDG Interface
QuickSilva (QS) HRG Interface
G007 Interface
WRX - uses Wilf's Hi-res drivers and needs a modified RAM pack
HRG-ms - uses Matthias's Hi-res drivers and needs a modified RAM pack
Pseudo Hi-Res (software only)

I presume that they all provide 256x192 pixels?

I know about:

GAMES
On Fred Nachbaum's Page:
Blackjack (WRX)
Blockbuster (WRX)
Dragons (WRX)
Dungeons of Ymir (WRX)
Hi-Res Chess (WRX)
Hi-Res Invaders (WRX)
Voyage of Peril (WRX)


On the RWAP Software page
Dan's Revenge (Pseudo Hi-Res)
Landhere (HRG-ms)
Rocket Crush (Pseudo Hi-Res)

On the Jet Set Willy Remakes Site
Manic Miner (Pseudo Hi-Res)

Commercial Games -
Software Farm:
Booster - the follow up to Rocket Man (Pseudo Hi-Res)
Forty-Niner (Pseudo Hi-Res)
Rocket-Man (Pseudo Hi-Res)
Z-Xtricator (Pseudo Hi-Res - although a different scheme) - I can't get this to work on EightyOne.... (see below as to how to do this)

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DEMO PROGRAMS
On Fred Nachbaum's Page:
Bi-Plot Demo (WRX)

On the RWAP Software page
Demo (HRG-ms)
Pipes (HRG-ms)

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OTHER PROGRAMS / UTILITIES
On Fred Nachbaum's Page:
3D Fractals (WRX)
Calendar (WRX)
FontKit for WRX16 (WRX)
Fourier Analysis (WRX)
F-Scapes (WRX)
Graphics Archiver (WRX)
Julia Sets (WRX)
L-Systems (WRX)
Macro-Life (WRX)
Mandelbrot-FFP (WRX)
Spirograph (WRX)
S-RAM Extended BASIC (WRX)
Votem Data-Acquisisiton (Pseudo Hi-Res)
Wa-Tor (Pseudo Hi-Res)
ZXPaint (WRX)
ZX*Term*80 (WRX)

On the RWAP Software page
Sinus (HRG-ms)
UHR (HRG-ms)
UPPERlowerfont (HRG-ms)
ZX4PAINT (WRX)

Commercial Programs -
Software Farm:
Spectrumiser Toolkit (Pseudo Hi-Res)

The memotech HRG has a resolution of 248x192.

It is described here: http://www.user.dccnet.com/wrigter/index_files/Shades%20of%20Memotech.htm

Siggi

There is also some software and demos by Bodo Wenzel available from his webpage

One of his demos talks about 320x240 hi-res graphics on the ZX81 !!

He lists:

GAMES
Puzzle99 (WRX)


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DEMO PROGRAMS
25thAnni (demo) (WRX)
MaxDemo (WRX - needs 24K)
Rezurrection (WRX)

RWAP wrote:Z-Xtricator (Pseudo Hi-Res - although a different scheme) - I can't get this to work on EightyOne....

Works fine with EO: set the hardware to a 16K Zeddy (not more!!!) and WRX off.
First load XTR, run it and then press BREAK. Then put SCREEN.P into the tape manger window and type
GOTO 16
to continue loading the next part.

HTH Siggi

Well that works now thanks - I can see why this game was a bit of a disappointment - not too bad for a scramble clone, but why does your ship crash and explode when you are a distance away from either the ground or the top of the screen!!

I may not be remembering correctly, but I think QS (Quiksilva) also had their own high-res interface.

BrunoFlorindo wrote:I may not be remembering correctly, but I think QS (Quiksilva) also had their own high-res interface.

Yes so they did - I have found some information on programming it (in French):
http://kweeky.over-blog.com/article-22270336.html

Wow. I wasn't aware of that site. And to my surprise Google translate does a great job translating it!

http://translate.googleusercontent.com/ ... N67TvD4RNA

It seems that most info about the card can be found here:

http://translate.googleusercontent.com/ ... cVXgpqf-3A

note: The above site is also a must for ZX81 users. The author is a member here (I think) and he has many good things on his site: schematics, documentation, articles with explanations about how interfaces work, list of available zx81 emulators and comparison chart, and many more zx81 resources!

One tiny correction;

Rock Crush and Dan's revenge use pseudo hires IIRC.

BrunoFlorindo wrote:Wow. I wasn't aware of that site. And to my surprise Google translate does a great job translating it!

http://translate.googleusercontent.com/ ... N67TvD4RNA

Yeah, but Google does not understand BASIC very well. The translation result of program line 290 is quite funny:
"REM 290 MW JK XY DR DR DR VW JK"

Perhaps French Zeddies understand that?

Siggi