Recent content by george

Obviously this gem is much more rare than later Trackstars. There is a chance software for later models could work with this one too. Nice it had been saved from scrapping.

Hello. I need at least an initial vector on building the DOS/32 DOS Extender from sources. http://download.narechk.net/dos32a-912-src.zip https://dos32a.narechk.net/index_en.html I am even puzzled which environment was used by its author (TASM? Open Watcom?). Any help will be highly...

Hi. Maybe a bit off topic but I do need and will appreciate your expert advice on the following NTSC problem (I am from Europe and NTSC is somewhat new to me). This is my first experience with a sony pvm (1440qm) monitor. The problem is it displays the first scan line with a given color in...

Does anybody know mtdt2 <REDACTED> buyer on ebay? His address is : <REDACTED> Bought almost all of my 4164 vintage socket pulled tested in ZIF socket programmer DRAMs a couple of weeks ago (24pcs.) from this listing: http://www.ebay.com/itm/254239598102 A week after his payment wanted to...

Is there a way to transfer/image RANA ELITE 3 (or previous) DS/DD diskettes? Rana Elite drives are GCR drives connected to a standard Disk II controller but have higher number of tracks and/or sides.

Looking for the MCS-48 firmware of this Apple ][ clone keyboard which to my shame I fried more than a decade ago by connecting its ribbon cable rotated by 180 degrees into the socket. It recently came to my mind and after a vague research I discovered that the controller was some version of...

Apple //GS: Is there a way to boot and run an (existing?) Apple ][ 6502 OS in banks E0/E1 in native CPU mode? No GS features are required. 1MHz clock like on previous Apple2s is perfect. The reason for needing this is because there are hardware features present in E0/E1 Mega II space which are...

I am posting here a diskette image of a probably unknown vintage Apple ][ game I recovered recently from almost damaged factory diskettes I acquired on the local aftermarket. Would be surprised if you've seen it before...

Hi. I would greatly appreciate if you can enlighten me when was the JEDEC-14 symbol defined. Does "-14" stand for year 2014? Also there are some differences in the labels I've seen all marked as JEDEC-14. I am trying to identify when a vintage hardware was (re)packed...Thanks...

Seeking for an apple2 experts advice here. Is there any software except for the original Saturn RAM card's tests that rely on or check for the *double* consecutive read accesses to C0x1 or C0x3 or C0x9 or C0xB in order to write enable the (language) RAM card? I am asking this because I've...

Does anybody know which computer/console this card is intended for? Thank you...

Hello. Run codes for Q387 emulator V2.3 (the earliest version of which I could find on the Internet) will be given in this thread. You just have to put here your "Machine code" and just in case mention the Q387 version you have/want to use. No other personal information is required or contained...

http://www.ebay.com/itm/Apple-IIe-monitor-printer-5-25-drives-and-3-5-drive-/141753630465 ZIP chip 4MHz, and a 3.5" FDD with controller and RAMWORKS III...Is this laser FDD with an 800K capacity? Is this a TTL components equivalent of the UDC controller?

Interested in these apple2 cards and possibly others for analysis...

The card I have is like this one http://www.ebay.ie/itm/Dual-Video-Card-9-pin-Digital-15-pin-Analog-WDC-61-603145-/191607842090 It came with BIOS EPROM that has incorrect checksum and therefore is not recognized after POST. If you are interested I can post my dump here...It is indeed form a...