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Today, 10:02 PM

PgrAm replied to a thread VGA timing for NTSC output with Mode X? in Vintage Computer Programming

No worries I found a register to check that works. Checking if the horizontal total register is 0x6B will tell you if an NTSC conversion TSR is...

6 replies | 234 view(s)

Today, 09:31 PM

falter started a thread Interesting Z80 Experimenters Kit in Vintage Computer Auctions

Never seen one like this... https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F253989030780

0 replies | 5 view(s)

Today, 09:02 PM

jharre replied to a thread Building and Altair 8800 from Scratch in 2018 in S-100

Thanks, Charles. I'll start a Bill Of Materials sheet and share it when complete. Those part numbers help. <*> Jim

20 replies | 663 view(s)

Today, 08:53 PM

falter started a thread Mac Classic almost mute in Later Apple (68000+ based machines - Mac, Lisa, etc.)

Okay I've done some reading on this one. The last week I've been pulling out machines one by one and testing them to see that they're still alive....

0 replies | 4 view(s)

Today, 08:49 PM

jacobtohahn replied to a thread 8” CDC Floppy Drive Repair in S-100

Thanks, that’s helpful. I must have missed that when I read the manual earlier. I have, however, closed one of them and didn’t get much progress....

12 replies | 261 view(s)

Today, 08:27 PM

dorkbert replied to a thread Macintosh 128K downgrade in Later Apple (68000+ based machines - Mac, Lisa, etc.)

looks like it probably has something like dove macsnap type of thing installed. the battery cover has been replaced with what looks like a SCSI...

13 replies | 169 view(s)

Today, 08:19 PM

falter replied to a thread Macintosh 128K downgrade in Later Apple (68000+ based machines - Mac, Lisa, etc.)

Yeah I caught onto that after I wrote... someone in another forum made a similar comment and explained. Well, there are 400k drives out there, and...

13 replies | 169 view(s)

Today, 08:16 PM

Chuck(G) replied to a thread 8” CDC Floppy Drive Repair in S-100

See here, page 31 (PWA diagram). Note that you have 4 DIP switches instead 4 shunts. One of these needs to be closed to access the drive. On...

12 replies | 261 view(s)

Today, 08:05 PM

Fanatik replied to a thread Tandy Sensation CD Rom Cable Identification in Tandy/Radio Shack

Also wondering if I could remove the card and use a scsi cable along with a scsi cd rom?

2 replies | 24 view(s)

Today, 07:57 PM

Trixter replied to a thread VGA timing for NTSC output with Mode X? in Vintage Computer Programming

IIRC that bit was only used in compatibility modes (meaning, you'll see it set if you initialize a CGA mode, but not regular VGA). Sorry I can't...

6 replies | 234 view(s)

Today, 07:57 PM

2icebitn replied to a thread Zenith minisPORT BIOS issues. in Other

I don't know the answer to your conundrum, but I do have 2 Minispurts, bad batteries though. I bought replacements, but haven't gotten around to...

3 replies | 35 view(s)

Today, 07:53 PM

Trixter replied to a thread AT&T box from "Halt and Catch Fire" in Unix/Xenix/Linux Workstations

That board, and the corresponding odd video mode that goes with it, remains unobtanium for me. I've never read anything about it other than what I...

6 replies | 155 view(s)

Today, 07:52 PM

Trixter replied to a thread Optimizing DOS 5.0 in Vintage Computer Software

For the 286, if the OP has an EMS card, can use QRAM to load some data into the page frame. My 8088 setup looks like this (PC-DOS 2000, but valid...

16 replies | 241 view(s)

Today, 07:51 PM

ngtwolf replied to a thread This seems steep for a Model 4. Am I wrong? in Tandy/Radio Shack

Agreed, and there are some odd things I see on there. That 64K logo isn't original, for instance. It seems to me like this guy wanted one to...

2 replies | 41 view(s)

Today, 07:44 PM

Hugo Holden replied to a thread For you monochrome lovers out there, which phosper do you prefer? in General Vintage Computer Discussions

Part of this relates to the early CRT's for both television and general electronic work. In the industrial setting green was common for monitors and...

39 replies | 814 view(s)

Today, 07:34 PM

Dawsoca replied to a thread Building and Altair 8800 from Scratch in 2018 in S-100

11/19/18 Hello Jim, if you need an assembly manual for the Altair board, Dave's Old Computer's Website has one for download. As to the parts you...

20 replies | 663 view(s)

Today, 07:11 PM

NeXT replied to a thread Apple Laserwriter/Laserwriter Plus Paper Trays in Vintage Computer Items Wanted

Still looking. I'm running out of time and I NEED those trays in order to exhibit the printer.

1 replies | 185 view(s)

Today, 07:10 PM

liqmat replied to a thread Night Stalker for the IBM PC (Mattel Electronics) 1982 PC Game in Vintage Computer Items For Sale or Trade

Guarantee you the Intellivison collectors from AtariAge are going to be all over this. I noticed you already have one bid. Nice! I know Mattel's...

1 replies | 71 view(s)

Today, 07:10 PM

lutiana replied to a thread IBM PC Convertible 5140 in PCs and Clones

I've been wondering how hard it would be to rebuild the battery pack myself. I have not been able to snap open one yet, though I've not had a go with...

2 replies | 34 view(s)

Today, 07:05 PM

AK6DN replied to a thread REMEX Paper Tape reader in DEC

I have sources, binaries, listing of the DEC standard BIN and RIM loaders here: https://www.ak6dn.com/PDP-8/MAINDEC/Binary_Loaders/

117 replies | 5611 view(s)

Today, 07:04 PM

pski replied to a thread This seems steep for a Model 4. Am I wrong? in Tandy/Radio Shack

It's a guaranteed working Model 4 with a crisp new CRT, both drives working and somewhat restored. If it wasn't for the cracked case, that price...

2 replies | 41 view(s)

Today, 06:55 PM

DFinnigan replied to a thread Macintosh 128K downgrade in Later Apple (68000+ based machines - Mac, Lisa, etc.)

You can tell by looking it in the mouth. The mouth of the 400K drive is different from the 800K. I've been meaning to write an article on this...

13 replies | 169 view(s)

Today, 06:55 PM

Syclops started a thread IBM AS400 Operating System Tapes - As they worth anything? in Other

I've got 8 IBM AS400 QIC-525 & QIC-120/150 Tapes from 1995, but I don't think I've got a complete set, and I know nothing about AS400 or if there is...

0 replies | 20 view(s)

Today, 06:54 PM

KG7PFS replied to a thread Apple //c SD drives in Early Apple (I, ][, ///, etc.)

Never mind, I found it farther down the page. Up to four 32Mb hard drives at once! Perfect!

4 replies | 37 view(s)

Today, 06:53 PM

pski started a thread Tandy Computers "Software Special" in Tandy/Radio Shack

We've discussed the Tandy 10 and the Tandy 150 recently. There was one other significant computer system that was sold by Tandy Computers. Now,...

0 replies | 25 view(s)

Today, 06:53 PM

Unknown_K replied to a thread Anybody care much about the power draw of your vintage systems? in General Off Topic

Well there are people who collect computers with tubes in them, they tend to be very inefficient with electricity and nobody would say they are not...

11 replies | 136 view(s)

Today, 06:51 PM

liqmat started a thread This seems steep for a Model 4. Am I wrong? in Tandy/Radio Shack

Is this steep for a Model 4? Not a huge Tandy collector so just asking for some opinions. ...

2 replies | 41 view(s)

Today, 06:46 PM

Fanatik replied to a thread Tandy Sensation CD Rom Cable Identification in Tandy/Radio Shack

Pic of the internal card

2 replies | 24 view(s)