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Разводка офигенно громоздких плат
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| VELESOFT | Дата: Четверг, 2009-12-24, 17:52:24 | Сообщение # 886 |
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| Quote (KOE) Вопрос к поьенциальным юзерам плат 2.666LE. Как удобней сделать обновление прошивок? From SD card. But can I use same SD card for TRD and SCL files for WDC ?
SDHC is also supported ? What is SD card size limit ? 8GB or more ? Or use only one firmware in flash eprom. This firmware make full reconfigurable computer (number of paging ports, memory layout, etc... After start will possible jump to BIOS rom (as on Sprinter 2000) and change configuration. It's very good idea. Possibility set size of border areas, screen size and position, sync shifting (move screen on monitor), reprogrammable ports number and adressation mask, INT position, ula timing.... It's very very hard to implement, but very powerfull for users.
SPRINTER 2000,ZX SPECTUM128+2,DATA-GER,K-MOUSE,DIVIDE512
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| KOE | Дата: Четверг, 2009-12-24, 18:06:18 | Сообщение # 887 |
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| Quote (VELESOFT) From SD card. But can I use same SD card for TRD and SCL files for WDC ? SDHC is also supported ? What is SD card size limit ? 8GB or more ?
You can use the same sd-card. SDHC is suppotred. In software there is no exact size limit, it comes from the card.
Мы рождены, чтоб сказку сделать былью
"Кто не обломался, тем еще предстоит"
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| lvd | Дата: Четверг, 2009-12-24, 18:25:16 | Сообщение # 888 |
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| Quote (VELESOFT) You are right But screen timing is bad (TV norm need 50 fps). Pentagon use only 48 fps, it's correct ? Is possible connect this machines to modern TV ?
Yeah it is also the part of standard. 71680 clocks in a frame with 320 lines. First, ANY CRT TV must eat such frame seamlessly.
Second - every LCD tv/monitor/whatsoever has absolutely no bounds for hor/vert frequencies, except for shit in firmware writer's heads. So if it won't accept 48Hz it is the fault of LCD maker, not of classical pentagon. Quote (VELESOFT) Pentagon 2.666 use compatible timing with old models ? (224 tacts per line and 320 tv lines) Also 48 fps ? Same number of CPU tacts per frame ? VGA output work at which freq ? Multicolors on VGA will work ? This is not questions for me so I let KOE anwser them. As for me, ZX evolution (also known as pentevo, or pentagon evolution) will be able to scan-double scanlines from 15kHz to 31kHz, while leaving 50 (or 48) Hz intact. Again, there are no limitations in CRT pc monitors that will prevent them from working at 50Hz frame rate (in contrast wth horizontal unit which can't work at 15kHz). Regarding LCD monitors, it will be up to their firmware writers heads, as I said.
So in ZX evolution, there will be 50hz/31kHz scan-doubling, which obviously will leave all multicolors intact. Also there is some trick possible to fix 48Hz issue while remaining multicolors. Just switch Z80 to 7Mhz turbo at a predeifned time until end of frame so that 71680clocks/frame remains intact. Quote (VELESOFT) All Pentagons in russia use always same timing ? (48 fps)
Yes, until Zx evo comes to reality.
Многого нет здесь: http://lvd.nedopc.com
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| lvd | Дата: Четверг, 2009-12-24, 18:28:19 | Сообщение # 889 |
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| Quote (VELESOFT) Exist only two original ZX128 model: ZX Spectrum 128
Aha, I've got your idea about amstrads. Nevertheless, "There exists only one true spectrum and its name is Pentagon 128".
Well, maybe also 1024, 4096... 
Многого нет здесь: http://lvd.nedopc.com
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| VELESOFT | Дата: Четверг, 2009-12-24, 19:12:40 | Сообщение # 890 |
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| Quote (lvd) Nevertheless, "There exists only one true spectrum and its name is Pentagon 128". Other ZX clones is not so popular ? SCORPION, ZX PROFI ...
SPRINTER 2000,ZX SPECTUM128+2,DATA-GER,K-MOUSE,DIVIDE512
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| deathsoft | Дата: Четверг, 2009-12-24, 19:14:28 | Сообщение # 891 |
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| Pentagon only popular as demo-scene computer. In St.Petersburg the most popular clone is scorpion.
Сообщение отредактировал deathsoft - Четверг, 2009-12-24, 19:15:31 |
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| MKiller | Дата: Пятница, 2009-12-25, 18:00:03 | Сообщение # 892 |
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| Pentago,Scorpion,ATM,Profi - some popular zx clone.
System die
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| VELESOFT | Дата: Пятница, 2010-01-01, 17:26:58 | Сообщение # 893 |
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| My idea:
Each russian ZX clone use different paging ports, different ports adressations,etc...
On all new ZX clones will best way use one additional paging port with full 16bit adressation, readable state and same function. For example in PENTEVO and PENTAGON 2.666 implement paging port #FFDF (or any other) with this layout:
D0-D7 = set memory page number 0-255 = 4MB maximum.
On next additional port will possible set videoram and rom:
D0-videoram
D1-rom (48/128)
If this paging schematic will implemented in all new other clones, then can by some software compatible without modifications. State of this ports will readable, etc... It's bad idea ?
SPRINTER 2000,ZX SPECTUM128+2,DATA-GER,K-MOUSE,DIVIDE512
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| deathsoft | Дата: Пятница, 2010-01-01, 17:56:24 | Сообщение # 894 |
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| Pentevo use the same page mapping as ATM2 and extended page mapping where page number is 8bit (4Mb ram) (ports are the same as in ATM2, extended paging mode can be enabled via control port, please contact CHRV or LVD for details).
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| VELESOFT | Дата: Пятница, 2010-01-01, 18:45:32 | Сообщение # 895 |
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| Quote (deathsoft) Pentevo use the same page mapping as ATM2 and extended page mapping where page number is 8bit (4Mb ram) (ports are the same as in ATM2, extended paging mode can be enabled via control port, please contact CHRV or LVD for details). I will also soon write new firmware ( for my PROFI INTERFACE ) with emulation of ATM TURBO 2+ memory paging. Also on my SPRINTER 2000 computer is possible use TRDOS from ATM TURBO 2+ if will rewrited all paging ports. SPRINTER 2000 also use paging in any CPU area and set page 0-255 (4MB). Actually SPRINTER's trdos support only FDD and classic ramdisc via #3D13, but more next features as import / export TRD images from/to FAT16, DIR fat16, etc... Ok, I contact CHRV, thank.
SPRINTER 2000,ZX SPECTUM128+2,DATA-GER,K-MOUSE,DIVIDE512
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| KOE | Дата: Суббота, 2010-02-13, 14:28:20 | Сообщение # 896 |
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| Забавная статистика. 
Мы рождены, чтоб сказку сделать былью
"Кто не обломался, тем еще предстоит"
Сообщение отредактировал KOE - Суббота, 2010-02-13, 14:29:00 |
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