Search found 106 matches

by MrVertigo
Fri Apr 12, 2024 2:10 pm
Forum: Emulators
Topic: ZX81 for iOS loads programs now?
Replies: 4
Views: 693

ZX81 for iOS loads programs now?

I noticed that the latest update says it can now load programs, but I can’t find any more info. Anyone know about this?
by MrVertigo
Fri Aug 04, 2023 6:27 pm
Forum: Development
Topic: Gamecoding in machinecode on a ZX81.
Replies: 54
Views: 51512

Re: Gamecoding in machinecode on a ZX81.

Thank you!
by MrVertigo
Fri Aug 04, 2023 4:36 pm
Forum: Development
Topic: Gamecoding in machinecode on a ZX81.
Replies: 54
Views: 51512

Re: Gamecoding in machinecode on a ZX81.

So we use both routines together in the code?
by MrVertigo
Fri Aug 04, 2023 3:27 pm
Forum: Development
Topic: Gamecoding in machinecode on a ZX81.
Replies: 54
Views: 51512

Re: Gamecoding in machinecode on a ZX81.

In Part 4) Input from the keyboard, there are two routines: nokey and upkey. After dealing with nokey, it says: “Get GAME1-002.ASM again in edit, we add a few lines Again UNDER SHOWA add the following code.” Here is my question: do we replace the nokey routine with the upkey routine, or do we KEEP t...
by MrVertigo
Thu Aug 03, 2023 1:51 pm
Forum: Software
Topic: Camouflage
Replies: 5
Views: 10906

Re: Camouflage

Here’s a good full-screen version of it too:

https://youtu.be/8u9ZyV-BHFA

He later became famous as Frank Sidebottom.

Google that name. He’s a legend!
by MrVertigo
Mon Jul 31, 2023 6:52 pm
Forum: Development
Topic: Gamecoding in machinecode on a ZX81.
Replies: 54
Views: 51512

Re: Gamecoding in machinecode on a ZX81.

Brilliant! Thanks.
by MrVertigo
Mon Jul 31, 2023 3:42 pm
Forum: Development
Topic: Gamecoding in machinecode on a ZX81.
Replies: 54
Views: 51512

Re: Gamecoding in machinecode on a ZX81.

I’m just at lesson 3 at the moment, Displaing On A Screen, so what I mean is- does this section of code: gamecode ld a,63 showa ld (screen),a dec a jr nz,showa jr gamecode Should this code only display an ever-changing character in one pixel at the top left corner of the screen, while the rest of th...
by MrVertigo
Mon Jul 31, 2023 1:37 am
Forum: Development
Topic: Gamecoding in machinecode on a ZX81.
Replies: 54
Views: 51512

Re: Gamecoding in machinecode on a ZX81.

Thanks! I gave it a try, and the resulting program displayed a black square screen, twenty by twenty, with the character set in one single “pixel” in the top left corner, running ever faster through the characters.

Is that the correct outcome?
by MrVertigo
Sun Jul 30, 2023 3:08 pm
Forum: Development
Topic: Gamecoding in machinecode on a ZX81.
Replies: 54
Views: 51512

Re: Gamecoding in machinecode on a ZX81.

Does the section below literally mean enter those two lines into the editor 20 times? So: block 20, 128 db 118 block 20, 128 db 118 block 20, 128 db 118 Etc.... Go to the dfile and erase the lines between the comments "; each line has text and a Newline" and "; this byte fills the unused part of the...
by MrVertigo
Fri Jul 28, 2023 1:34 am
Forum: Development
Topic: Using Inkeys
Replies: 23
Views: 13414

Re: Using Inkeys

Nice!

Another method I’ve seen is:
10 LET N=0
20 LET A$=INKEY$
30 IF A$ <> “” THEN GOTO 60
40 LET N=N+1
50 IF N<50 GOTO 20
60 IF A$=“8”...etc

In line 50 you set the length of pause you want.