|
Post by mirkosoft on May 16, 2020 13:36:57 GMT
Sold for bjonte.
Miro
|
|
|
Post by mirkosoft on May 14, 2020 9:02:57 GMT
Hi friend, please send me your postal address to PM and e-mail too - I'll contact you.
Miro
|
|
|
Post by mirkosoft on May 13, 2020 12:41:47 GMT
Hi! I have for sale very often used X-Pander-3. My 2nd computer is gone and I need it not. It is in perfect condition - no functional or visual damages. Price is 18 EUR + 7 EUR shipping costs inside EU (not only European Union, whole Europe) = 25 EUR total (sending oversea costs needs to calculate) Miro
|
|
|
Post by mirkosoft on Apr 22, 2020 23:26:34 GMT
Hi!
I'm long time watching progress of VYMS cartridge for Commodore 128, Commodore 64 and Commodore VIC20 - video and audio extension with RS-232 port and 192K Video RAM
What it is: Cartridge uses Yamaha V9958 VDP videochip (used in MSX2) - with higher resolution, more colors and more sprites than VIC-II or VIC-IIe has, VDC has still higher resolution and TED color count is much more lower. Llook at features: Video RAM: 128 KB + 64 KB of expanded VRAM Text modes: 80 x 24 and 32 x 24 Resolution: 512 x 212 (4 or 16 colors out of 512) and 256 x 212 (16, 256, 12499 or 19268 colors) Sprites: 32, 16 colors, max 8 per horizontal line Hardware acceleration for copy, line, fill, etc. Interlacing to double vertical resolution Horizontal and vertical scroll registers VideoRAM used in VYMS cartridge offers 192K RAM, where is not comparagble even with our VDC
Cartridge uses also Yamaha YM2413 sound chip which offers 9 voices, 15 instrumentsThis is used also in MSX2 computer and was used also in music keyboards.
And there is also RS-232 serial port provided by 6551 ACIA and MAX-232 chips
Here's Steve Gray's project link
Why this post? Simply - development hangs still 2 years and I contacted Steve if will be VYMS finished. His words were "when I will have free time"... I want by posting this thread to speed-up development and make Steve aware that we are waiting.
So, imagine - C128 with 3 displays, colorful, more sprites, add audio and RS-232 offers many ways to enhance system.
I hope we can talk about and speed-up development. Agree anyone of you?
Miro
|
|
|
Post by mirkosoft on Apr 7, 2020 15:05:54 GMT
Hi Torsten!
I forgot that, thank you. Miro
|
|
|
Post by mirkosoft on Apr 7, 2020 0:22:10 GMT
Hi!
I need to copy Z80 BIOS separately. Q is maybe stupid, but I want to be sure that I have whole Z80 BIOS and its code copied - and all parts of Z80 code starting at C128 system start. Can anybody explain me where is this part in ROM?
Thank you all for patience. Miro
|
|
|
Post by mirkosoft on Jan 8, 2020 23:10:17 GMT
Hi! I created renderer for VDC 720x700 and 800x600 longer time ago. It features also rendering VDC VGA Mania monochrome modes. How to use: 1. open PGM in exact dimensions (720x700 or 800x600) 2. render 3. save PRG after use loader in VDC Mania release. Here's link: csdb.dk/release/?id=179470Miro
|
|
|
Post by mirkosoft on Jan 3, 2020 1:23:03 GMT
Main problem is that it looks that MMU affects only 8502 - I can test it but I have no time now and few weeks will not. If anyone has experience can solve my problem.
Miro
|
|
|
Post by mirkosoft on Jan 2, 2020 6:13:33 GMT
No, MCR what is $D505 is able to switch CPU, but it is visible only when IO is visible in memory. And it needs RAM config by:
lda #$3e sta $ff00 There is problem.
Miro
|
|
|
Post by mirkosoft on Jan 1, 2020 20:26:25 GMT
Hi!
My Q is bit naive - but need to be sure:
Is possible to access whole 128K RAM by Z80 in C128? I know that Z80 CPU address space is 65536 B or 64K. Q refers to MMU. Problem is that MMU config at $FF00 switches to Z80 CPU. But really each change of $FF00 affects active CPU? When we look at system at power-on C128 starts Z80 and by detection switches to 8502 - AFAIK it has nothing with $FF00. Even - no matter of MMU state - what is for Z80 visible? Always is visible physical 1st 64K block?
Even if Z80 is not aimed on 1st physical 64K RAM block, it is much more easy to do with Z80 in CP/M Cartridge...
Thank you for help, replies or comments. Miro
|
|