Search found 64 matches

by Phibrizzo
23 Mar 2024, 11:22
Forum: Hardware and software hacking
Topic: New size coding contest "ZX Spectrum effect"
Replies: 16
Views: 469

Re: New size coding contest "ZX Spectrum effect"

This is my last word: _CPU v5.vcpu _VAR FC_Main #129 _RUN #141 ; FC_Main + 12 ; ----------------------- _VAR ScrAdr #129 _VAR ScrAdrH #130 _ORG FC_Main DC_W #$0800 ; load screen address before code _LAB #1 XORW ScrAdrH ANDI #1 ADDI #63 POKE ScrAdr INC ScrAdr ; start from here <--- _LAB #2 LD ScrAdr ...
by Phibrizzo
21 Mar 2024, 19:57
Forum: Hardware and software hacking
Topic: New size coding contest "ZX Spectrum effect"
Replies: 16
Views: 469

Re: New size coding contest "ZX Spectrum effect"

\ Just to see how small it can be using only C and without crashing. Yoy gave me an intersting idea. All program is in User variables space _CPU v5.vcpu _VAR FC_Main #129 _RUN #131 ; FC_Main + 2 ; ----------------------- _VAR ScrAdr #129 _VAR ScrAdrH #130 _ORG FC_Main DC_W #$0800 ; set screen addres...
by Phibrizzo
19 Mar 2024, 17:04
Forum: Hardware and software hacking
Topic: New size coding contest "ZX Spectrum effect"
Replies: 16
Views: 469

Re: New size coding contest "ZX Spectrum effect"

I disasembled Your program.
You and at67 used very smart trick: if color is biger that 63 then is black.
Congratulations!
by Phibrizzo
17 Mar 2024, 11:56
Forum: Hardware and software hacking
Topic: New size coding contest "ZX Spectrum effect"
Replies: 16
Views: 469

Re: New size coding contest "ZX Spectrum effect"

petersieg wrote: 13 Mar 2024, 17:14 Here is mine solution (not sure, if screen is correct this way?):
Today i check Your program on real Gigatron.
Im sorry, but Your program does not meet its main goal.
by Phibrizzo
14 Mar 2024, 08:05
Forum: Hardware and software hacking
Topic: New size coding contest "ZX Spectrum effect"
Replies: 16
Views: 469

Re: New size coding contest "ZX Spectrum effect"

Hello :) You have to be careful when specifying rules and then saying all tricks allowed. Ah, You are right. About Your program, i can only say: You Win! This is my example: _CPU v5.vcpu _VAR FC_Main #$20A0 _RUN FC_Main ; ----------------------- _VAR ScrAdr #129 _VAR ScrAdrH #130 _ORG FC_Main _LAB #...
by Phibrizzo
13 Mar 2024, 21:55
Forum: Hardware and software hacking
Topic: New size coding contest "ZX Spectrum effect"
Replies: 16
Views: 469

Re: New size coding contest "ZX Spectrum effect"

Hello :)

In Your code is little error.
In loops you must started from x=1 and y=1. Because you did [x-1][y-1].
And first index = x - 1 = -1. The same for y.

Okay, we have the first player, who next?
by Phibrizzo
13 Mar 2024, 15:05
Forum: Hardware and software hacking
Topic: Time for a contest? Simplest maze-like printing..
Replies: 21
Views: 6530

Re: Time for a contest? Simplest maze-like printing..

Somethink like that

Image

Only 160x120 pixels, and one tile is 1x1 pixel
by Phibrizzo
11 Mar 2024, 13:07
Forum: Hardware and software hacking
Topic: Time for a contest? Simplest maze-like printing..
Replies: 21
Views: 6530

Re: Time for a contest? Simplest chessboard printing..

I proposes a new competition. Very old, from ZX Spectum forum.

Goal: draw black and white 1x1 pixel chessboard on full screen.

Rules:
- must run on ROMv5+
- 32KB+ machines
- no SYS functions
- all tricks allowed

The winner is: shortest gt1 file.
by Phibrizzo
07 Mar 2024, 21:01
Forum: Escape Meta Alt Control Shift
Topic: Revision 2024
Replies: 1
Views: 108

Revision 2024

Hello :)

https://2024.revision-party.net/

I be there :) But without hardware.
Who else?
by Phibrizzo
24 Jan 2024, 02:16
Forum: Hardware and software hacking
Topic: ROM adventures (dev7rom)
Replies: 32
Views: 9420

Re: ROM adventures (dev7rom)

Then, wouldn't it be simpler to add independent RTI instruction in newer version of ROMs?

BTW: why doesn't exist DEC instruction? (x--)