Brian H
  • Member for 4 years, 11 months
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What to do with stone age x86 computers?
Accepted answer
3 votes

The hardware is modern enough such that to the best of my knowledge nothing would exclusively run on them but not on a current PC This statement partially answers your question, given that the idea ...

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PET as a terminal
12 votes

I don't have any experience with the exact modification you are talking about. However, I think it is a relevant point that the design of the firmware for Commodore microcomputers included a "...

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Running WarpCopy64 on an emulator
4 votes

Using VICE 3.4 on Linux, I am able to activate the Ethernet cartridge peripheral in the emulator and launch the WarpCopy64 server. To fully test, I'd just need a Windows machine on my LAN to run the ...

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Did Apple bundle a specific monitor with the Apple II+ for schools?
6 votes

You are not alone, as I have the same memory. Very "cube-looking" 9-inch monitors were a common peripheral for the Apple ][/][ Plus. You will find many pictures online of this setup, and may ...

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What are people using old (and expensive) Amigas for today?
7 votes

Your question seems to assume that there must be some practical need for owning a classic Amiga computer today, and that the price of the machine in the marketplace should be reflective of this ...

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Defining zeropage address labels in xa assembler?
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2 votes

This code achieves the output you want: tmp1=$00 tmp2=$01 * = $100 lda $12 sta tmp1 lda $34 sta tmp2 I don't think the segment identifiers are really intended to be used in ...

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Amiga 500 WorkBench 1.2 Freezes
4 votes

Workbench 1.2 is known to have some bugs, and it would be better if you could boot into Workbench 1.3 instead. Based on your description, I suspect your mouse could be malfunctioning. It sounds like ...

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Were there any computers that did not support virtual memory?
24 votes

The Amiga from Commodore shipped in October 1985 with a preemptive multitasking operating system designed to run many processes. The hardware lacked any support for virtual memory, and the Operating ...

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What is the largest single file that can be loaded into a Commodore C128?
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11 votes

The maximum size file that you can load with the built-in commands is 65280 bytes. This is using the address range of $0000-$FEFF for either BANK. There is no "wrap" ability to extend from ...

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Why does an Amiga's floppy drive keep clicking?
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6 votes

On the Amiga, CIA 1 is used for the disk controller, and Port A on CIA 1 is used to sense the state of the /DSKCHANGE signal from a pin on the floppy drive interface of the currently selected unit (...

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Is there a possibility for a user-defined IRQ hardware vector on a Commodore 128 in C128 mode?
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7 votes

When the C128 is running in its native mode, the only "fixed" memory addresses are $FF00-$FF04. These 5 bytes allow access to the first 5 registers of the MMU regardless of the current ...

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Using a GSM (2G) cellphone as a modem to send code
1 votes

The GSM standard defined a digital cellular network. Therefore, it has always been capable of doing data communications, computer-to-computer, from the very beginning. Nowadays, most public networks ...

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A game where you program a robot to fulfill missions
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7 votes

It sounds like you are probably referring to the 1984 release of Chipwits. It was originally released for the Macintosh, and was ported to the Apple ][ and Commodore 64. The screenshot below is from ...

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What tricks or techniques were used to speed up AmigaOS boot
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5 votes

In general, booting an Amiga from an HDD is quite fast, and can certainly be far less than 30 seconds even when a significant number of drivers and small applications are loaded via commands in S:...

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How did C64 games handle music during gameplay?
50 votes

Your assumptions about timing and interrupts are correct. Actually, it is surprisingly easy to add SID music to games because they tend to follow a basic pattern. Compose the tune in a C64 SID editor....

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What pointing devices were available for C64/C128?
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15 votes

Before GEOS and the 1351 mouse became popular for the C64/C128, the most notable (non-joystick) pointing device was the famous Koala Pad. There were a few programs for the C64 before GEOS that ...

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Transforming a memory dump into something loadable
6 votes

Maybe I'm confused by your question, but have you tried LOAD'ing the PRG file? Loading memory is done with write operations. Write operations ignore ROM banking and always go to the underlying RAM ...

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Reconstructing uncompressed program from compressed tape image
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3 votes

With Vice, you can wait until the uncompressed, actual, application code has started execution, then activate the built-in ML Monitor. You will thus pause execution at wherever the Program Counter ...

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I need to find a controller card for an apple II 5.25 inch floppy drive, the 20 pin connector wont work on the 34 pin controller card i have
2 votes

Your question is confusing because there is not a 34-pin option for a 5.25" floppy disk drive that is directly compatible with an Apple ][ floppy controller card. This link describes all the ...

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How were games and programs written for the C64 in assembler in the 80s?
7 votes

The HES MON 64 cartridge, by Terry Peterson, seems to have been available as early as 1982 (same year as the C64). This, according to the copyright notice on the manual. While it is referred to as a &...

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What limited the performance of the SuperFX chip?
15 votes

There are two main limitations with SuperFX that limited its performance and the level of 3D gaming that could thus be accomplished (e.g how many polygons/second). The chip itself only provided ...

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What kind of television set would work with the Commodore 64?
20 votes

TL;DR If you don't want to rely on an intermediate device, such as a "scan-doubler", then you need a screen that includes analog inputs and internal electronics capable of displaying a low-...

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How were the 70's and 80's coin-op programmed?
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13 votes

Of course, there were hundreds of different standup arcade games, utilizing different hardware, and different developers creating software for them using different tools. So, there's no "one-size-...

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Who ended up owning Commodore's semiconductor IP?
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21 votes

TL;DR The ownership issue is really associated with the trademarked brand and product names, and the copyrighted ROM software, not the processor/co-processor hardware. I think there are two ...

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When did the faster versions of the NMOS 6502 become commercially available?
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3 votes

The MOS MCS6500 microprocessor family datasheet from May, 1976 indicates that: "All versions of the microprocessor are available in 1 MHz and 2 MHz maximum operating frequencies." The ...

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How does DMACON/R registers on Commodore Amiga platform work?
3 votes

From the question, I think you already understand the basic function of the DMACON registers. In a nutshell, any form of DMA has to be enabled under software control by the programmer. This because ...

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A1200 Amitek Hawk, Guru Meditation 8000 000B when loading games from Gotek
1 votes

I think the first question to answer is whether booting from a game floppy image via the Gotek is the best way to achieve game compatibility with an expanded Amiga. In my experience, compatibility is ...

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Swapping endian-ness on the 68000
6 votes

Since you mentioned the Amiga in your question, it ought to be relevant as to how this problem was solved efficiently on that system. As I understand, the "glue" logic for the Bridgeboards ...

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Max length of traces / wires for MC680x0 relocator
2 votes

According to the project page on GitHub for the Open68000Relocator board: The board has been tested and proved to be working perfectly with a TF530 card running at 50 MHz. So, if you can use the ...

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Which Commodore CDTV models came with keyboard with grey caps
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3 votes

The Commodore CDTV did not come with any keyboard, mouse, or external floppy drive. These accessories were available by purchasing the optional "Expansion Pack" for ~$200. To my knowledge, ...

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