Re: Did anyone see Vintage Tech Hunters on Discovery Canada yet?

2018-11-08 Thread Eric Schlaepfer via cctalk
Many of the 8-bit ones go for quite a bit more. There was an SB 1.5 that went for $200 recently, and a Game Blaster went for $400! Once you go past the SB Pro the prices drop a lot, SB 16s (especially the Vibras) are dirt cheap. I think people have a fascination for the old Creative CMS chips

Re: does a reverse-engineering EDA tool exist?

2018-10-24 Thread Eric Schlaepfer via cctalk
I've gone through this a few times myself. There are a few approaches. One is to use a schematic tool like Kicad to place all the ICs first, then add the wires and rearrange things as you buzz out the connections. Another approach uses an intermediate step where you enter all the buzzed out

Looking for Targa 1.0 drivers

2018-08-27 Thread Eric Schlaepfer via cctalk
I have some old Targa 1.0 video boards (dating back to their AT days) but no driver diskettes. Does anyone happen to have some? I think they should work with Targa 16 drivers.

Re: The near-mythical IBM color MDA

2018-08-24 Thread Eric Schlaepfer via cctalk
It only supports mode 7 since it's an MDA card. :) The QBASIC COLOR statement doesn't bother to range check the arguments, it just copies them into the attribute byte in video memory. This is why the trick works. Other programs *know* that you clearly have a monochrome card so they won't use the

Re: The near-mythical IBM color MDA

2018-08-23 Thread Eric Schlaepfer via cctalk
I'm not that lucky! But yes, an early card with the light pen connector should work. The card I used for the demo is a somewhat later revision. I added rework wires to match the schematic in the technical reference manual of the earlier revision. With either an early MDA card or a modded card,

The near-mythical IBM color MDA

2018-08-23 Thread Eric Schlaepfer via cctalk
The NEC Multisync monitor thread reminded me that I used one to produce a video, and I thought a few of you might enjoy it. https://www.youtube.com/watch?v=-TiHFWH4NWk

Re: NEC Multisync monitor manual

2018-08-23 Thread Eric Schlaepfer via cctalk
The model number is JC-1401 if that helps. On Thu, Aug 23, 2018 at 6:08 PM Charles Dickman via cctalk < cctalk@classiccmp.org> wrote: > I am looking for a manual for the original NEC Multisync monitor. > > Google fails me because of all the follow on monitors had Multisync in the > name. > >

Prototype IBM DemiDiskette drive

2018-08-22 Thread Eric Schlaepfer via cctalk
Yesterday I dug out my prototype IBM DemiDiskette drive and took some photos: https://twitter.com/TubeTimeUS/status/1032066215647166464. It caused a bit of interest on Twitter so I figured some of you here may also like seeing it. I don't really know a whole lot about it other than what my

Re: PTAP2DXF - make paper tapes without a punch

2017-12-01 Thread Eric Schlaepfer via cctalk
This is awesome! I've had an idea on the back burner that would require some fairly custom plastic punched tape. I was thinking of using a laser engraver but this would be a lot better -- no scorched edges. On Fri, Dec 1, 2017 at 5:51 AM, Steve Malikoff via cctalk < cctalk@classiccmp.org> wrote:

Re: WTB: HP-85 16k RAM Module and HPIB Floppy Drive

2017-11-17 Thread Eric Schlaepfer via cctalk
e controller board? > > Since it does HD, I suspect it probably does not use a 600 RPM mechanism. > > Thanks! > > Best regards, > Eric > > > On Nov 15, 2017 17:45, "Eric Schlaepfer via cctalk" <cctalk@classiccmp.org> > wrote: > >> It'd be int

Re: WTB: HP-85 16k RAM Module and HPIB Floppy Drive

2017-11-16 Thread Eric Schlaepfer via cctalk
; > Since it does HD, I suspect it probably does not use a 600 RPM mechanism. > > Thanks! > > Best regards, > Eric > > > On Nov 15, 2017 17:45, "Eric Schlaepfer via cctalk" <cctalk@classiccmp.org> > wrote: > >> It'd be interesting to find ou

Re: WTB: HP-85 16k RAM Module and HPIB Floppy Drive

2017-11-15 Thread Eric Schlaepfer via cctalk
It'd be interesting to find out how well that PRM-85 works. I've laid out a board for a rough equivalent but I haven't fabbed it out. It may be cheaper for me to buy that instead. I've also got a 9122C but I don't have the mass storage ROM so I can't use it with my 85. Right now I'm using it with