Search found 214 matches

by zsolt
Thu Feb 09, 2012 2:18 pm
Forum: Development
Topic: Hi-speed loadings for zx81
Replies: 52
Views: 63145

Re: Hi-speed loadings for zx81

Hi, Try to adjust the volume using a shorter, 1K program (e.g. hlg_joy4zeddy.wav - it is only 4 seconds away from your life ;) ) . Size of RAM / RAMTOP was OK (see above) ? What is your system? I tested only on (more) ZX81 and a TS1000 (which are basically the same) . You tried both versions? Zsolt
by zsolt
Tue Feb 07, 2012 12:04 pm
Forum: ZX BASIC
Topic: SPeccy ON the ZeddY
Replies: 100
Views: 62977

Re: SPeccy ON the ZeddY

The flickering problem with Z88DK was solved, after some additional PUSH/POPS/LD after label "L023E:" were removed I recalculated the the timings of your code and understand now what you mean. Removing these commands the VSYNC now starts before the HSYNC. Previously it was reverse: the VSYNC starte...
by zsolt
Sun Feb 05, 2012 12:52 pm
Forum: ZX BASIC
Topic: SPeccy ON the ZeddY
Replies: 100
Views: 62977

Re: SPeccy ON the ZeddY

Hi Siggi, ...the display timing is still a little bit different compared to the ZX81 rom. Yes, it had 3 main difference: the top/bottom margins, scanlines/frame and the length of the VSYNC. ZX81 ROM SPONZY margins bottom=top bottom=top+2 scanlines/frame 309 314 VSYNC in TS 1233 1410 (measured with E...
by zsolt
Sun Jan 15, 2012 10:01 pm
Forum: ZX BASIC
Topic: SPeccy ON the ZeddY
Replies: 100
Views: 62977

Re: SPeccy ON the ZeddY

Hi Siggi, LoaderFlowChart.jpg A code for loading a block: BlkLoader call ReadMMCByte ; dummy read: LSB of length of block call ReadMMCByte ; dummy read: MSB of length of block ; call ReadMMCByte ; dummy read: flag byte NextByte call ReadMMCByte ; a data byte from a block ; ld (ix),a ; if you give i...
by zsolt
Sat Jan 14, 2012 1:23 pm
Forum: ZX BASIC
Topic: SPeccy ON the ZeddY
Replies: 100
Views: 62977

Re: SPeccy ON the ZeddY

Dear All, When I read this topic , I wondered a little, because i store my actual projects in several places: on a PC, on my Laptop and on a pendrive. But it is not enough. If we does not keep them in sync, then bizarre things can happen: After the image problems reported by Siggi, SPONZY was tried...
by zsolt
Tue Jan 03, 2012 11:15 pm
Forum: ZX BASIC
Topic: SPeccy ON the ZeddY
Replies: 100
Views: 62977

Re: SPeccy ON the ZeddY

Hi Siggi, Sorry for the delay. in PAL mode: 1 frame ~= 312 scanline (312*207TS -> 19.872 msec ~50,322Hz) in NTSC mode: 1 frame ~= 262 scanline (262*207TS -> 16.687 msec ~59,925Hz) It seems that there is a reserve in PAL mode (<20 msec), therefore the length of the frame can be extended. In the revis...
by zsolt
Sun Jan 01, 2012 7:30 pm
Forum: Development
Topic: Hi-speed loadings for zx81
Replies: 52
Views: 63145

Re: Hi-speed loadings for zx81

Hi all, Before Christmas I wrote a letter to Santa Claus with my wishlist: ZXPAND, Andy's ULA replacement,... ;) Uselessly :( (e.g. i'm waiting for a illuminated world globe since 30 years) . In my sorrow I decided to further develop the HibrydLoader. The result and some examples are in the attachme...
by zsolt
Sun Jan 01, 2012 7:20 pm
Forum: ZX BASIC
Topic: SPeccy ON the ZeddY
Replies: 100
Views: 62977

Re: SPeccy ON the ZeddY

sirmorris wrote:Where did the bbc basic port appear from??
found here ;)
by zsolt
Sat Dec 31, 2011 10:36 pm
Forum: ZX BASIC
Topic: SPeccy ON the ZeddY
Replies: 100
Views: 62977

SPeccy ON a real ZeddY

Hi again! Sorry for the long lasting silence, but I spent my limited free time developing and testing. The project went on more paths (hw/sw), but finally it all came together, and you can see the result in the attachment. In chronological order: June : I redesigned the appearance, as a result there...
by zsolt
Mon Dec 26, 2011 1:25 am
Forum: Sinclair Misc
Topic: Merry Zeddy Christmas!
Replies: 9
Views: 4922

Re: Merry Zeddy Christmas!

Merry Christmas to all,
Zsolt