Unanswered Questions
17 questions with no upvoted or accepted answers
10
votes
0
answers
511
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) (...
- 2,060
7
votes
0
answers
198
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 ...
- 71
6
votes
0
answers
241
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 ...
- 4,856
5
votes
0
answers
165
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 ...
- 10.5k
4
votes
0
answers
501
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 ...
4
votes
0
answers
259
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 ...
- 64.6k
4
votes
0
answers
103
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. ...
- 403
4
votes
0
answers
325
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 ...
- 64.6k
3
votes
0
answers
274
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 ...
- 193
2
votes
0
answers
201
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)
...
- 29
2
votes
0
answers
243
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 (...
- 189
2
votes
0
answers
443
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 ...
- 64.6k
2
votes
0
answers
154
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 ...
- 242k
1
vote
0
answers
210
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 ...
- 40.3k
1
vote
0
answers
364
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 ...
- 64.6k