Search found 220 matches

by Crazyboss
18 Oct 2018 20:22
Forum: HARDWARE
Topic: NTSC/PAL VDP setup?
Replies: 10
Views: 639

Re: NTSC/PAL VDP setup?

Ok, but I assume in very limited numbers.

I only know about MIKEs NTSC Memotech, I assume all the Computers in the Memotech Hardware Survey, are PAL versions.
Dave wrote:Yes, they were sold in the US

with a different UHF modulator, VDP and video board
by Crazyboss
18 Oct 2018 14:15
Forum: HARDWARE
Topic: NTSC/PAL VDP setup?
Replies: 10
Views: 639

Re: NTSC/PAL VDP setup?

I really dont know, but a guy at the SORD facebookpage said if he clear bit 0 at reg.0 the screen on a sord computer will go out of sync.

But that also lead me to another question, if MIKEs NTSC Memotech was a prototype or they really sold them in USA and Canada?
by Crazyboss
18 Oct 2018 09:16
Forum: HARDWARE
Topic: NTSC/PAL VDP setup?
Replies: 10
Views: 639

NTSC/PAL VDP setup?

Hi I Follow another Facebookgroup for the SORD computer, which had the same hardware as the Memotech, exept from a lower clock at the CPU. 3.57mhz. The guys there talk about have to patch games written for NTSC to PAL. Like A bit have to be diffirent while setting up the VDP registers. That is new I...
by Crazyboss
17 Oct 2018 09:40
Forum: PROGRAMMING
Topic: Stack pointer on entry to m/c programs
Replies: 5
Views: 564

Re: Stack pointer on entry to m/c programs

That looks like 8080 derived code. The Z80 has both LD (nn),SP and LD SP,(nn) to save and load the stack pointer to memory without involving HL. Yes Martin you are right :) The single opcode is better to use. I used the trick to put the Stack pointer back to the Init point, in a Intellivision game ...
by Crazyboss
16 Oct 2018 17:05
Forum: SOFTWARE
Topic: Thoughts on Einstien "Stolen" Software?
Replies: 5
Views: 480

Re: Thoughts on Einstien "Stolen" Software?

Tony, maybe it was the same as the ColecoVision. The VDP was connected to NMI instead of INT. Thats why its harder to port games to the ColecoVision, its much easier with the other systems since they all use INT. Many of the Memotech titles never used Interrupts. AstroPAC did, but it was not ported ...
by Crazyboss
16 Oct 2018 13:45
Forum: PROGRAMMING
Topic: Stack pointer on entry to m/c programs
Replies: 5
Views: 564

Re: Stack pointer on entry to m/c programs

Not sure if I understand it right or not.

Read the stackpointer at entry and put it back on exit?


LD HL,#0000
ADD HL,SP
LD (SPACE),HL
.
.
.
CODE
CODE
CODE

EXIT:
LD HL,(SPACE)
LD SP,HL
RET

Do not overwrite SPACE and SPACE+1 :)
by Crazyboss
16 Oct 2018 06:17
Forum: OFF TOPIC
Topic: Music in MegaStar game Fathoms Deep?
Replies: 2
Views: 273

Music in MegaStar game Fathoms Deep?

The music in Fathoms Deep, is it some classic British tune ? A few nights ago, I could not sleep and i watched some British Crime TV Movie, might have been Barnaby I think in UK its named "Midsomer Murders", In a park or amusement park there was some orchestra playing the same tune. Never heard it b...
by Crazyboss
15 Oct 2018 09:26
Forum: MEMOFEST 2018
Topic: Pictures
Replies: 7
Views: 733

Re: Pictures

Glad you had a nice Memofest, hopefully I will see you next year :) I actually forgot it was this weekend :( Nice cake :) Great you had some fun with Turbo :) I record my personal highscore to be 2900 back in year 2000 :) The new forum MEMOFEST 2019 already created. I previous think I saw a UK Compu...
by Crazyboss
09 Oct 2018 15:04
Forum: INTRODUCE YOURSELF
Topic: Muldjord aka "El Senator"
Replies: 8
Views: 630

Re: Muldjord aka "El Senator"

Did you try ANDYs MEMU emulator, it also does a very good emulation, back in the 90s we used a windows ported MAC emulator, which didn work so good. So memu is the way to go today for emulation. I hope you get it up running, I might have some spares if you find the problem. Did you have RS232 in you...
by Crazyboss
08 Oct 2018 18:05
Forum: INTRODUCE YOURSELF
Topic: Muldjord aka "El Senator"
Replies: 8
Views: 630

Re: Muldjord aka "El Senator"

Welcome back Lars :) Yes back then you was to only other Memotech Guy I could find, Later I got in touch with Andy Key and some of the other programmers too. Maybe we will meet in a Future Memofest in UK, this year I am not going :( When you will get your Memotech up and running, you can find "New" ...