Sinclair ZX80 / ZX81 / Z88 Forums

Amongst the items I sent to Bruno recently was an instruction leaflet on how to make an EPROM upgrade for the Z80 to allow you to use EPROMs as well as the Z80 processor (at least I think that was it). We just need that scanning in and someone to make the board! Not sure what the limits on EPROM siz...

One thing that would help would be a friendlier url, something easier to remember. That would help spread it. My WOS sig has the url already. I'm going to add it to my sig on every English and Spanish site I visit. A friendlier URL would help, but that would mean paying for more hosting - alas I ca...

Talking about the forum - at the Quanta Sinclair QL show over the weekend, I was surprised by how many people did not know about this forum! I have been promoting it - we need to let maybe the other ZX81 groups know about it - including the one in Germany...

Now I do like these ideas - but have to agree, my first instinct is for logo 3 - the text is clearer and the pictures show both a ZX80 and a ZX81, although they are a little indistinct. If we leave time for comments until, say 20th April, we can then decide which to go for - unless any more suggesti...

We are currently listing a range of Timex/Sinclair and ZX81 items on ebay brought over from America. Amongst them will be 8K non-volatile memory interface, a TS1500 computer and even the TS1000 schematic! We also have several Tree Forth EPROMs (there are some marked TS1000 and some ZX81, so presumab...

All it needs now is a front loading tape machine to fill the hole in the front of the case!

Why not post the relevant code, to help others in a similar situation?

Ah for that you will need to remember what the angle is at all times and use SIN and COS (sine and co-sine) calculations to work out the change to the current x,y co-ordinate to find the end of the line.

x=x+(SIN(angle)*length)
y=y+(COS(angle)*length)

XavSnap wrote:Hi !

My game:

Code: Select all

10 LET WINNER$="ZX81"
20 IF WINNER$="ZX81" THEN WINNER="SPECTRUM"
30 PRINT AT 0,0;WINNER$
40 GOTO 30
50 SAVE "THE-WINNER-Is"

Xav Fun.

Ah I see - the game is to spot the deliberate mistake!

Hi - I have collected quite a few Sinclair related items over the weekend - alas only two ZX81 items have come to light at the moment. Both can be had for the cost of post and packing: 1. Timex-Sinclair TS1000 circuit board (untested - modulator top is rusty, but visually OK). 2. Original 16K RAM pa...