Recent posts

#21

M

Technical support - Hardware related / Re: CPC 6128 - white screen, b...

Last post by mmldrm - Yesterday at 20:01

Place between r112 and diode is the same ROMDIS but i think better to hold probe. Pin40 of 765 is better to hold 5v

Thanks. We did this and there was nothing on-screen. I think this is correct because without ROM the board does nothing?

I measured pin2 and pin14 of IC127-IC134. All are still fluctuating between 0-5v, same as last time.  

#22

Programming / Re: crtc info

Last post by McArti0 - Yesterday at 19:48

remember...

http://logon.system.free.fr/html/downloadlogon.htm

#23

Programming / crtc info

Last post by Fran123 - Yesterday at 19:37

Hello,

I am trying to understand the crtc and the information it handles to try to emulate the generation of the image.

I think it would be very helpful for me to understand the meaning of the VCC, VLC, R52, VSC, HDC, HCC, VTAC, HCC, HSC, VMA, VDUR, MODE and ICSR fields




Thank you!

#24

C

General Discussion - Introductions / Re: What computer did you have...

Last post by cwpab - Yesterday at 19:23

was not "mine" but the Thomson T07-70 of the school they left in the storage room. My mum -teacher- brought it at home

Very cool! I find these Thomson machines quite interesting. 5 models, but no compatibility among them, 500K sold in France... And a nice list of mostly French games.

The graphics look cute, did you play any games on it?

#25

Amstrad CPC hardware / Re: CPC four times faster...

Last post by McArti0 - Yesterday at 19:15

Does anyone know what the fastest Z80 currently on sale is?

20Mhz. !!! 5 Times faster.

II'm currently designing an extension for the 6128 in the onebyte cache for write concept.

#26

General Discussion - Introductions / Re: What computer did you have...

Last post by Prodatron - Yesterday at 19:03

For my job some day I did need a PC, later a laptop, but the never could do what my CPCs can do. 

Thanks to WinApe my PCs can do the same like my CPCs since more than 20 years

#27

General Discussion - Introductions / Re: What computer did you have...

Last post by Prodatron - Yesterday at 19:01

Did anyone here ever see or use one of these French Thomson computers?

Yes, roudoudou:
https://www.cpcwiki.eu/forum/general-discussion/what-computer-did-you-have-before-cpc/msg238429/#msg238429
But he had it BEFORE

#28

G

Amstrad CPC hardware / Re: VGA through rpi pico - How...

Last post by gregg - Yesterday at 18:56

Aha, as I said... here is something for the Sinclair QL

I think that's more or less just a scan-doubler that digitizes the QL output and sends each line twice to the monitor. If I understand gregg correctly he is rather mirroring the screen RAM and listens to the CRTC/GateArray registers.

@gregg in case I am right with that assumption that you are not just digitizing the screen output and replay it again, then you also have to consider double and triple screen buffering.  Many games switch the screen address between frames. If you are mirroring the screen contents you also have to keep 2 or 3 screens in the PICO Ram.

Nope... I am more like doing a scandoubler, just the simplified one that assumes Amstrad palette, so it is easy to use just digital pins, voltage comparators on input and 6 resistors on output.

I was considering mirroring the ram, but I got scared  double and triple buffering is just a beginning. What about reading the palette etc. That's too much for me 

#29

Amstrad CPC hardware / Re: VGA through rpi pico - How...

Last post by eto - Yesterday at 18:47

Aha, as I said... here is something for the Sinclair QL

I think that's more or less just a scan-doubler that digitizes the QL output and sends each line twice to the monitor. If I understand gregg correctly he is rather mirroring the screen RAM and listens to the CRTC/GateArray registers.

@gregg in case I am right with that assumption that you are not just digitizing the screen output and replay it again, then you also have to consider double and triple screen buffering.  Many games switch the screen address between frames. If you are mirroring the screen contents you also have to keep 2 or 3 screens in the PICO Ram.

#30

G

Amstrad CPC hardware / Re: VGA through rpi pico - How...

Last post by gregg - Yesterday at 18:44

Thanks for link. I will take a look there