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Post by mirkosoft on Feb 19, 2016 21:50:54 GMT
Hi!
I have simple Q: What a CPU - real CPU and its differences to 6502 uses DTV? Why? I was always meaning that's only emulated 6502 but why has Turbo Assembler option DTV? There must to be difference, for example in addressing... I know near nothing about DTV 'cause it's only gaming console (in my eyes).
Thank you for info.
Miro
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Post by mirkosoft on Feb 12, 2016 16:28:31 GMT
Hi all The Ace fans! In case of C128, C64 and C65 (also Mega 65) I can say - each of them using same architecture X65 (of course only stnadard opcodes). The Ace SinCore is like name - single core for each. For news visit The Ace blog - commodore-ace-os.blogspot.sk/BTW. What a format to use for selection target path in Wings install? New in VICE is also emulating of Z80 CPU and CP/M cartridge for C64... Miro 99
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Post by mirkosoft on Feb 3, 2016 10:11:36 GMT
Hi!
I'm searching over the web for full size of VIC-I, VIC-II, VIC-IIe, VIC-III and VDC screen. I mean real maximal resolution - not only no border 320×200 for VIC-II, but really what is possible - each VIC chip (1, 2, 2E, 3). In case of VIC chips it's more easier than VDC 'cause VDC has variabile resolutions. VDC (no matter of VDC-RAM size) has also limit, but where is? Largest resolution applied is 800×600 by Torsten Kracke, but it's limited by 64K of VDC-RAM. I know there are limits for data flow, but I want to know real maximum no matter of data flow and possible displaying. Why? For example VIC-III has enough RAM for 1280×800 pixels in monochrome mode (1 bitplane) but computer is limited to display 1280×400 in 4 colors only (2 bitplanes). I want to know real maximum of each chip, thank you for understanding.
Miro
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Post by mirkosoft on Dec 24, 2015 12:49:24 GMT
Thank you very much!
Miro
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Post by mirkosoft on Dec 23, 2015 19:08:55 GMT
Hi!
I found reference to 65SC02 CPU and I'm searching for diferences in instuction set between 6502 and 65sc02. Like is SCPU or WDC65816 (65K family) not 100% compatible with 6502 - for example illegal opcodes (6502 is x65 family)... also 65c02 has extended instruction set and is not fully compatible - it looks like first step in difference between these 3 CPUs is: 65c02 - on half way 65sc02 and finally 65816... But nowhere I found 65sc02 opcodes table or any descripton. In case of 65c02 - it was used in Turbo Master @ 4 MHz.
Thank you for help.
Miro
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Post by mirkosoft on Oct 25, 2015 19:41:58 GMT
Robert, this I forgot - it's specific for device: IEC-ATA V2.1 It's best solution for have HDD or use CF card as HDD in simple FAT32 filesystem. Yes, disadvantage is also single partition, other are invisible Jochen Adler (firmware creator) will work on CD support... Bit replacement IDE64 for C128...of course very limited
Miro
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Post by mirkosoft on Oct 24, 2015 14:47:20 GMT
Hi!
Finally I'm working on one part of The Ace and have by SCPU JiffyDOS on my DCR. JiffyDOS at disk access turns off VIC2E and when is disk access completed, again turns VIC2E on. I want to avoid it, better to say disable turning off VIC2E or make not possible to turn off VIC2E
I have idea to have in IRQ part of code which always (without check) turns on VIC2E, but it makes computer bit slower, but not so slow like when is IRQ checks VIC2E state, when is off, then turns it on. Have anybody idea or is possible to make generally VIC2E always turned on? Of course 2 MHz mode is other and this cannot handle VIC2E, and core can at 2 MHz enable turning off...
Why? Simple: user working in UI based on VIC2E uses any function which needs data load from disk, maybe only small part, and at disk access will UI flicker? This is unwanted. I know JiffyDOS can be turned off, but when C128 access 1541 drive it's unusable - speed is very very slow. If anyone know any trick like is possible to avoid flickering sprites at disk access, please let me know. I mean - it is possible to avoid sprites flickering, so it must to have solution to avoid turning off VIC2E.
Many thanks.
Miro
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Post by mirkosoft on Oct 13, 2015 8:18:24 GMT
OK, simplest Q: I turn it off. Must I remove also RGBI data (video signal) cable?
Miro
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Post by mirkosoft on Oct 13, 2015 0:57:46 GMT
Hi!
Like all of us know that VDC 8568 (DCR VDC revision 2 chip with additional 38th register) can produce EGA mode 640×350 non interlaced. 38th register can select polarity of signal which is safe for EGA monitors, but standard Commodore monitors like 1084, 1902 etc... can not handle and crashes forever. Long long time I was using LCD displays or other display option for my DCR but since I'm working more and more with lightpen I must to use 1084 monitor 'cause converters changes timing and LCD disables lightpen access. Now is for me big Q 'cause I was owner of Commodore monitor long long time ago and at that time I didn't knew anything about 8568 EGA and 38th register. I want to use EGA mode without damage 1084 - my DCR is connected to three display devices: LCD, CRT (PC monitor) and Commodore 1084S-P... Q: Is safe only to leave 1084 turned off or must to be signal cable connected also removed? I know that I'm asking like little kid, but I have not lot of money to get new 1084 - so this Q has real base...
Thank you all for reading it and each help.
Miro
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Post by mirkosoft on Sept 26, 2015 22:29:06 GMT
Hi! I got for my Nexys4DDR (currently using for Mega 65) one D81 image with file manager working in mode 64 (so targetted for C64) named "WGM" - nothing more know, here's screenshot: Knows anyone its name and any similar or the same, but version for our Commodore 128? Thank you for replies! Miro
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