Search found 157 matches

by kmurta
Sun Apr 01, 2018 9:59 pm
Forum: GAMES
Topic: LODERUNNER on the ZX81
Replies: 32
Views: 8830

Re: LODERUNNER on the ZX81

Kelly, would you like to publish your Chroma .col and .chr file? If it isn't finished yet, then it would certainly need a few beta testing volunteers (like me for example). :D See it above. The great advantage of the "Chroma Program Enhacement Creator" is that each user can customize it according t...
by kmurta
Sun Apr 01, 2018 9:50 pm
Forum: GAMES
Topic: LODERUNNER on the ZX81
Replies: 32
Views: 8830

Re: LODERUNNER on the ZX81

Btw you could make a man with leggs together and arms waving in half byte an other halfbyte. See my “wiwo dido and the case of the broken timemachine” on the ZX Spectrum for it. Other advantage.... player walks in any direction It´s here: runner.gif And the .col and .chr files to be used with the "...
by kmurta
Sun Apr 01, 2018 9:42 pm
Forum: GAMES
Topic: LODERUNNER on the ZX81
Replies: 32
Views: 8830

Re: LODERUNNER on the ZX81

Moggy wrote:
Fri Mar 30, 2018 10:28 pm
Nice work Kelly and nice to see you back again. :D
Thanks, Moggy!

It's really been a long time without coming here.

Real life is not easy, but we keep going ;)
by kmurta
Fri Mar 30, 2018 7:09 pm
Forum: GAMES
Topic: LODERUNNER on the ZX81
Replies: 32
Views: 8830

Re: LODERUNNER on the ZX81

Thank you, Mr Beep!!!

It´s amazing!

RobertK wrote:
Fri Mar 30, 2018 12:50 am
BTW, this game would be a good target for Chroma colourisation (and UDG as well), I will see what can be done with it.
Oh, I could not resist:
runner.gif
runner.gif (77.95 KiB) Viewed 2713 times
by kmurta
Mon May 15, 2017 1:59 am
Forum: Software
Topic: Programming Challenge
Replies: 13
Views: 3832

Re: Programming Challenge

I thing in this too after my post, but I´m very lazy these days :mrgreen: But you can save more 5 bytes in your ShuffleMessage routine, look at this: shuffleMessage: ; ld a, (happyBirthday) ;load the first character of the message ; push af ;save the first character of the message ld hl, happyBirthd...
by kmurta
Fri May 12, 2017 10:25 pm
Forum: Software
Topic: Programming Challenge
Replies: 13
Views: 3832

Re: Programming Challenge

An other option, with 144 bytes in two Basic lines (123 bytes of z80 codes): upside: ld hl,msg ld de,(16396) ; screen address inc de ld bc,12 ldir rightside: ex de,hl dec hl ld b,4 rsloop: push bc ld bc,33 add hl,bc ld a,(de) ld (hl),a inc de pop bc djnz rsloop underside: ex de,hl ld bc,13 add hl,bc...
by kmurta
Fri Sep 23, 2016 4:40 am
Forum: ZX BASIC
Topic: Return to BASIC
Replies: 17
Views: 7735

Re: Return to BASIC

mrtinb wrote:I had hoped the program was still in BASIC, so I could jump back to Forth with a RUN or GOTO.
Try this:

Code: Select all

ld hl,($4004)
dec hl
ld (hl),$3e
dec hl
ld sp,hl
ld hl,$0676
push hl
rst     08H             ; ERROR-1
defb    $0C             ; Error Report: BREAK - CONT repeats
2016-09-22.png
2016-09-22.png (71.25 KiB) Viewed 2220 times
by kmurta
Fri Sep 23, 2016 4:25 am
Forum: ZX BASIC
Topic: Return to BASIC
Replies: 17
Views: 7735

Re: Return to BASIC

I guess that the basic context (system variables) are more or less destroyed when starting Toddy Forth. :| If just the stack point would be modified, RST $8, DEFB 0xFF should work to switch back. It just set the stack new and restart BASIC but doesn't restore all system variables. The system variab...
by kmurta
Wed Sep 21, 2016 10:04 pm
Forum: ZX BASIC
Topic: Return to BASIC
Replies: 17
Views: 7735

Re: Return to BASIC

LD HL,(ERR_SP) LD SP,HL RET Result in a cold start of Toddy Forth only. RST 08H DEFB 0xFF Has this picture for a while, and the resets the ZX81 and return to [K] and empty LIST. This occur because Toddy Forth modifies the system stack (SP) so in a return to BASIC the system references are lost. I d...
by kmurta
Tue Nov 18, 2014 7:50 pm
Forum: Hardware
Topic: Chroma 81 - SCART and Colour interface for the ZX81
Replies: 154
Views: 45278

Re: Chroma 81 - SCART and Colour interface for the ZX81

How did you make it on the first attempt ??? The credits is all for zsolt, I only change the code to work with a full dummy dfile ;) Here are the version used on the scr viewer: ; ############################################################## ; # HR Driver from Sponzy, by zsolt. # ; # This driver s...