Included tags: IRQ ×
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Commodore Discussion • Slimed for the Commodore PET 2001

Commodore.ca about 2 months ago

What is this?It's a remake of Jim Summer's SLIME game for the Commodore PET 2001.What's different?This game works on 8K PET 2001 models. As a result, the menu system was redesigned, there's no sound and the game is only 25 blocks in size. Did you shrink t …

Can't share an IRQ in DOS with a device I'm not even using?

VCFed about 3 months ago

Apologies if this has been asked many times before, but: I've read lots of things saying that IRQs can't be shared, and I understand why that could be the case if I had two devices triggering the same IRQ line and two drivers I wanted to process those inte …

8-bit acorn hardware • Failed model B - empty data bus.

Stardot about 5 months ago

Hi All,I'm gradually working my way through the possible causes of a dead model B and I would appreciate the wisdom of the forum at this point.Story so far, I got hold of an issue7 model B a couple of months back, all working when I got it, RIFA capacitor …

Commodore 16, 64, 128, VIC-20, PET • OT: C64, reset and irq implementation question

MISTerFPGA about 6 months ago

Hello,maybe this is a bit off topic for MiSTer, but maybe some experts on the C64 FPGA implementation may help me by finding an answer which is/was also of interest by the FPGA implementation of the great C64 core.I am currently working on an implementati …
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Scene • What could cause keyboard input to stop working?

Lemon64 about 6 months ago

I am developing a text editor, and am hunting a programming bug that I believe is some kind of memory corruption, which manifests in an odd way: the program hangs by the C64 text cursor stopping blinking, and user cannot enter any more input in the applic …
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8-bit acorn hardware • Penultimate squirrelly Beeb

Stardot about 7 months ago

I'm at a loss with this Beeb, another where there have been several RAM failures - 9 in total, five from CAS0 and four from CAS1. Lots and lots of dead ICs on the board. I've gone through this board for five hours today and found the following issues;(A …

Hardware • Hardware issue - stuck IRQ - failed ADC

Tatung Forum about 8 months ago

I picked up an old TC-01 recently and It was working well after replacing I016 and a few capacitors in the PSU. I powered it up the next day and I was greeted with the **EINSTEIN** banner and nothing more. Anyone had an experience with a continuously asse …

acorn atom and acorn system series • How are Interrupts handled by the Atom?

Stardot about 9 months ago

Please HELP, I'm stuck Doing some research concerning the way in which the Atom reacts to an IRQ (Interrupt ReQuest) I didn't get any further than the following:1. On an IRQ signal (at pin 4) the 6502 jumps to the address found in #FFFF-#FFFE, this is #F …

Nintendo M82 kiosk

Arcade Projects about 10 months ago

Hey gang, Something you don’t see everyday. I have a Nintendo M82 kiosk here I have here I am thinking of selling. It is a ntsc unit that has the following done to it. New power supply 240 volts The grey lid has been powdercoated flame red Etim RGB bo …
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New Releases • New Release - Lunar City by Richard of TND

Lemon64 about 10 months ago

https://richard-tnd.itch.i... New Dimension is very proud to present to you Lunar City. This is a fun and challenging space shooting gallery type of game written for the Zzap! 64 Micro Action Covermount.The game was inspired by Atlantis for th …

Video • ASUS V3800 (TV) WIn98 black screen

Vogons about 10 months ago

Hi there!I have this TNT2 based card from ASUS that I like and that is giving me headaches. To summarize:- In Win98, anything but 640x480 in 16 colors will produce a black screen on login. It works fine as a standard vga adapter before any driver is insta …

IBM PS/2 and Soundblaster CT2910 problems

VCFed about 10 months ago

Hi guys, I finally managed to get hold of a Soundblaster 16 CT2910, which the seller claims is working. I have the jumpers set to I/O 220, 8-bit DMA 1, 16-bit DMA 5, IRQ 5, IDE Interrump 15. As soon as I put the board in my PS/2 Model 30 and try to boot, I …

Resetting a Tektronix 4051

VCFed about 10 months ago

I'm debugging a Tektronix 4051 with a hardware fault somewhere. It would be convenient to be able to reset the machine without power-cycling it. What would be the best way to do this: pulling RESTART-0 to 0V? (For now: address and data lines are behaving …

Sound • MPU-401/MT-32 + SB16 problems with some games

Vogons about 10 months ago

Hi guys,I have a MPU IPC-T unit with its card installed in a machine that also has an SB16 ASP. The MPU unit feeds to an MT-32 rev.0.I want all MIDI in DOS to use the MPU, so I have the jumpers on the cards as follows:MPU IPC-T:IRQ 2/9, Port 330SB16:Port …
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32-bit acorn hardware • Atomwide / ANT Ether3 bodge

Stardot about 10 months ago

A pair of Ether3 podules...But not quite identical. The 'ANT' branded one has this PNP (2N3906) transistor bodged in to the IRQ line...(Trace is cut on the underside of the board).Ideas why? A gate delay? Drive strength?Statistics: Posted by IanJeffray …

Software • DOS memory managment hell

Vogons about 10 months ago

I have never been good at memory management in DOS, the situation is bad enough that i can't even launch quest for glory 1 VGA because i lack enough free memory, i will upload my config and autoexec files. Hopefully somebody can help me fix whatever happe …

Hardware and Tech • VIC 20 - Black Screen that's really fighting me

VIC-20 Denial about 10 months ago

I have a VIC-20 (not CR) that has a black screen upon boot. Here's what I've done so far:Per Ray Carlsen's VIC-20 diagnostics document for black/blank screenUAB1, UAB36522VIA – PENDING CHECKING FOR SHORT OR FAILUREUB47406LOGIC - REPLACEDUB76560-101VIC …

Sound • Sound Blaster 2.0 DMA Jumper Question

Vogons about 10 months ago

Hi everyone!I have a Sound Blaster 2.0 CT1350B sound card in my Tandy 1000 TL/2. It’s working great, but it does render the Tandy DAC inoperative. The computer freezes anytime I try to use the Tandy DAC now. I’m assuming it’s a DMA conflict as th …

PC Emulation • UniPCemu issues running ReactOS

Vogons about 10 months ago

I'm having issues running the latest ReactOS image inside UniPCemu (i440fx just improved with a lot of extra and improved support for PCI etc.):Kernel log of ReactOS dumped through serial output connected to putty through another UniPCemu (using a TCP con …
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Help & Support • C64Studio help with debugging and interrupts

Lemon64 about 11 months ago

Hi,I hope someone can help. I've started to do some asm in C64 Studio and I've been having some debugging issues. I'm using C64Studio 7.4.1 with WinVice 3.7.I'm having a problem where I set my breakpoints, build, debug and the code executes, but the debug …

32-bit acorn hardware • Reverse engineering the ARCIN V6C PLDs

Stardot about 11 months ago

What I have:Code: Name IDE1V6_A;Partno 00000;Date 08-07-97;Revision 01;Designer D Prosser;Company BAILDON ELECTRONICS;Assembly IDE Podule PAL;Location IC 1;/************************... …

Sound • Soundblaster 16 CT2910 Panasonic interface

Vogons about 11 months ago

I recently got few old Creative CD-ROMs and SoundBlaster 16's. One interesting was that there is Sound Blaster 16 CT2910 which has Panasonic interface without header and one Creative CR-563-B CD-ROM with Panasonic interface. Why and should I try to conne …
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General Old Hardware • Populating the PS/2 port on a SOYO SY-4SA2

Vogons about 11 months ago

Hi folks,I want to populate the PS/2 mouse port on my SOYO SY-4SA2 motherboard. I'd seen a thread on here a while back but for the life of me can't find it anymore. Does anyone know the components needed (type, value, size)?This is what the unpopulated ar …

8-bit acorn hardware • My first BBC B micro repair

Stardot about 11 months ago

My maiden post here…hi to all!About 20 years ago an Issue 7 BBC model B came into my possession from a clear out and it languished in almost barn conditions since then.In a spate of getting my other vintage machines back to running order (Victor 9000, H …

Sound • SB16 + GUS Classic + PCMIDI/MT-32 for DOS/Win3.11 - should this "just work"?

Vogons about 11 months ago

Hi all,I'm building a Pentium 133 MMX box for DOS (and occasional Windows 3.11) gaming, and have been buying components for it left and right. In the sound department, I've got a GUS Classic rev 2.4 coming in from eBay, and am about to bid on multiple SB …