Skip to main content

Questions tagged [hardware]

Retro hardware generally: boards, extension cards, power supplies, peripherals. Use more specific tags as appropriate; use [case] instead for enclosures.

19 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
10 votes
0 answers
499 views

How would toggling a bit in the POWCNT1 register cause hardware damage on the Nintendo DS?

From GBATEK, writes to a certain I/O port for power management may damage hardware: 4000304h - NDS9 - POWCNT1 - Graphics Power Control Register (R/W) 0 Enable Flag for both LCDs (0=Disable) (...
forest's user avatar
  • 2,039
9 votes
0 answers
285 views

Why must the Amiga 1020 disk drive be powered-on before and powered-off after the Amiga computer?

The Amiga 1020 was a 5.25" disk drive for use with the Amiga computer. Anecdotally, I suspect they are somewhat rarer these days because they were a less popular choice for a second drive back in ...
Geo...'s user avatar
  • 10.2k
7 votes
0 answers
186 views

Need help checking an ADC0808 / ADC0809 chip in a arcade shooting game

Main Question: How can I check a ADC0808 chip to determine if it needs to be replaced or if my issue is something else? Any advice you can offer is SO appreciated! ADDITIONAL INFO When the arcade is ...
Red732's user avatar
  • 71
6 votes
0 answers
222 views

Where can I find information on old Kontron emulators?

Way back in the mid-80s, I worked as a programmer for the Apple II family, Commodore and Atari machines. I remember programming them using a big intimidating box branded Kontron stacked on top of my ...
ATL_DEV's user avatar
  • 382
5 votes
0 answers
113 views

What documentation was provided with the Amiga 1020 disk drive?

The Amiga 1020 was a 5.25" disk drive for use with the Amiga computer. Anecdotally, I suspect they are somewhat rarer these days because they were a less popular choice for a second drive back ...
Geo...'s user avatar
  • 10.2k
5 votes
0 answers
220 views

Where can I find a schematic of the AT&T KBD 301?

Where can I find a schematic of the AT&T KBD 301? I have an old AT&T 6300 (AT&T's rebrand of the Olivetti M24) but the keyboard (AT&T KBD 301) is not working. Many of the keys do work ...
user4574's user avatar
  • 399
4 votes
0 answers
235 views

Why did Gran Trak 10 cost so much?

In 1974, Atari released a driving game called Gran Trak 10. The development prototypes had used real car steering wheels and pedals, but it was realized these were too expensive, so they were changed ...
rwallace's user avatar
  • 63.1k
4 votes
0 answers
97 views

Backlight inverter failure on TI Travelmate

I picked up a TI Travelmate 4000E for free and it worked perfectly using my AC adapter(genuine TI one from another 4000E). The backlight fires up full brightness for about a second, then dies. ...
Jason's user avatar
  • 41
4 votes
0 answers
323 views

Cost of Apple II switching power supply

Apple went to the trouble of designing a switching power supply at a time when they were still quite new and not widely used for consumer electronics, perhaps because Steve Jobs liked the aesthetics ...
rwallace's user avatar
  • 63.1k
3 votes
0 answers
336 views

Two Unknown Sony Corp Boards - Please identify

There are two Boards: The first one has Chips with the name "Sony 501 0C 185", "Sony 502 0J 043", "Sony 504 1B 002 504-3", "Sony 509 01 017 509-00", "Sony ...
I Ate Minecraft's user avatar
3 votes
0 answers
174 views

Troubleshooting Legacy Hardware and Software Issues on MS-DOS and Windows 3.11

I have an old PC with the following hardware components: Motherboard: AMI TITAN II EISA rev.D RAM: 48MB of 4 SIMM CPU: 154C Pentium (tm) BIOS: 711011596 HDD1: SCSI controller adapter through PCI (PCI) ...
CluelessENGR's user avatar
3 votes
0 answers
260 views

VisiCalc V1.0 is not working on modern computer as expected

I am trying to run Visicalc on the modern laptop (Lenovo Thinkpad X1 Extreme Gen.2). I created bootable flash drives with DOS 6.22 and Free DOS, booted from them and ran visicalc (vc.com file). All ...
Art Spasky's user avatar
2 votes
0 answers
228 views

Help debugging a circuit/code for Z80 and TMS9918ANL

I am working on designing a Z80 computer that utilized the TMS9918ANL for graphics. I am currently just trying to make sure the TMS9918ANL is working, so I hooked up the control pins the bus (...
benjamin black's user avatar
2 votes
0 answers
423 views

What was the cost of the PS2 chip in the last PS3 to have it?

The PlayStation 2 provided backward compatibility with the PS1 by essentially incorporating an entire PS1 on a separate chip. It kept this arrangement permanently. The PS3 started off providing ...
rwallace's user avatar
  • 63.1k
2 votes
0 answers
141 views

How to reset/recover password on Ascend/Lucent "SuperPipe 155" ISDN router

I am trying to set up a second-hand 1990s era Ascend/Lucent "SuperPipe 155" ISDN router for use with some of my 90s era computers, but I don't know the router's password and the instructions I found ...
Juffo-Wup's user avatar
1 vote
0 answers
171 views

Defective Apple IIe motherboard

I have a PAL Apple IIe, put in service in 1982. Components C9, C12, C15, and C17 on the 820-0073-B motherboard are burnt out. I originally thought they appear to be power diodes, but seem to be 10 µF ...
Jochen's user avatar
  • 11
1 vote
0 answers
332 views

Was hardware scrolling patented?

One of the most valuable graphical features on early computers that had it, was hardware scrolling, that allowed the horizontal position of the screen to be adjusted by one or more pixels, thereby ...
rwallace's user avatar
  • 63.1k
1 vote
0 answers
279 views

Frozen horizontal width coil in old CRT monitor

I have an old Apple IIe CRT monitor which could use a small horizontal width adjustment. Unfortunately, as I try to rotate the hex key in the coil with a CRT adjustment tool, it doesn't want to move. ...
Joel Graff's user avatar
0 votes
0 answers
132 views

Which aspects of RF emission were TI unable to get under control?

The TI 99/4 (as opposed to 4A) was a computer killed by RF emission problems. From Wikipedia Through the development period, several companies attempting to enter the home computer market were faced ...
rwallace's user avatar
  • 63.1k