Re: Zilog Z80 drop-In Replacement

Posted on 2020-07-03, 17:28

by

by Zup

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It seems that the main difference between NMOS and CMOS variants are: - Behaviour of bit 3 and 5 of flags. - A undocumented instruction that behaves as out (c),0 in NMOS variants and as out (c),255 on CMOS variants. I guess that features are rarely used, but... Also, I've found some more information …

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Re: Zilog Z80 drop-In Replacement

Posted on 2020-07-02, 18:56

by

by Zup

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Why? I mean, I've got a ZX Spectrum and looking on game protections (and I guess that RNG too) it's easy to see that much of that stuff relies on cycles being accurate (or, at least, R being accurate). If you shorten instructions, the behaviour of R will be different. OTOH, I don't know about Z80 …

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Re: Seaching for way how to connect case USB header to back case USB port..

Posted on 2020-06-20, 15:37

by

by Zup

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I've got had: - A cable that allows connecting a internal USB 3.0 header to external USB ports, but I removed it when I had a MB with internal USB 3.0 header ( something like this ). - A USB 3.0 front panel (that included a hub), and it came with cables to connect it to standard USB 3.0 ports. - A …

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Re: What retro activity did you get up to today?

Posted on 2020-06-08, 06:31

by

by Zup

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Last weeks: - Wrote a script to join CLRMAME .DAT files. - Wrote some tools to remove headers, cut, split, and xor ROM files. - (Re)Wrote a program to convert snapshots from ZX Spectrum to tap files, using the loading schemes of transtape interface.

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Re: MS-DOS DoubleSpace and DriveSpace, anyone use it?

Posted on 2020-06-04, 07:10

by

by Zup

in Marvin \ Software

in Marvin \ Software

Didn't use doublespace nor drivespace, because I had some friends that had computers running stackers (one was using DRDOS and the other MS-DOS 5.0)... and both computers ended with corrupted data.

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Re: Your oldest favorite computer game?

Posted on 2020-05-31, 11:01

by

by Zup

in Milliways

in Milliways

https://www.youtube.com/watch?v=9Hy29KoBnGY Jet Pac, 1983

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Re: Rant: please stop linking to "Stason .org" for Total Hardware 1999 (TH99) pages

Posted on 2020-05-21, 11:46

by

by Zup

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

uBlock? AdBlock? NoScript?

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Re: Good ftp client for 95

Posted on 2020-05-20, 06:46

by

by Zup

in Marvin \ Software

in Marvin \ Software

I remember using LeechFTP, but I don't remember if it was 95 or 98...

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Re: PC-XT (Amstrad PC1640) low free memory under MS-DOS

Posted on 2020-05-10, 18:37

by

by Zup

in Marvin \ Software

in Marvin \ Software

Your Amstrad PC1640 has only 640Kb. No area above 640k on this machine. Even if you install an EMS card you probably won't get high memory. Himem.sys needs a 80286, and EMM386 a 80386. Remember that you have a 8086... they won't work. I'd recommend you to use MS-DOS 3.x (Amstrad PC1640 system disks …

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Re: Playing GOG games on real Retro DOS PC

Posted on 2020-05-10, 11:00

by

by Zup

in DOS

in DOS

I know that GOG is holding 99% of the Single CD games on a file called game.gog which is a normal iso but only renamed. I tried to rename the file and burn to CDR but only a very few are readable with DOS. Most are not. What do I wrong? Those gog files are (mostly) not ISOs, and usually are not …

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Re: Toshiba Satellite 4600 Pro - Looking for Recover CD’s

Posted on 2020-05-09, 14:23

by

by Zup

in Marvin \ Software

in Marvin \ Software

I've got a Satellite Pro 4340, and I didn't (nor expect to) find those recovery disks. Instead, I found that Toshiba keeps every driver (even BIOS updates) from that era, so I downloaded everything and installed it over a vanilla Windows 98SE installation.

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Re: Arabic theme games?

Posted on 2020-05-09, 06:35

by

by Zup

in Windows

in Windows

Have there ever been games based on the Sinbad stories? Have you tried to look for some common terms like "genie", "sinb", "baba", "thiev", "pers", "east" or "arab" on old software sites (like world of spectrum, home of the underdogs... depending on which system do you want to play)? Sinbad from …

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Re: Arabic theme games?

Posted on 2020-05-08, 17:59

by

by Zup

in Windows

in Windows

Everything on Middle East: - On ZX Spectrum: Manic Muslim, El Misterio del Nilo, Tuareg... - PC: Desert Strike, every Shantae game (sort of arabic themes), Aladdin, Serious Sam, Anomaly Warzone Earth... With arabic levels: - Metal Slug, some Splinter Cell games, some Ace Combat games, Duke Nukem …

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Re: What's the "signature thing" to do after installing an OS?

Posted on 2020-05-05, 12:03

by

by Zup

in Milliways

in Milliways

I almost forgot... - On every system installed: forget about windows explorer and install Total Commander. - On most systems: install an old version of PDF Creator (1.73 or so). - On Windows 7 or more recent systems: remove XPS printer, check the "optional features" installed (I'm spaniard, I don't …

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Re: how to make an old computer?. 286, 386, 486, 586. 686 Schematics

Posted on 2020-05-04, 14:07

by

by Zup

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

If you're thinking about a Sinclair ZX Spectrum, all the schematics are on the service manuals but it can't be remanufactured anymore. The main reason is the ULA, that was a custom chip made by Ferranti not available anymore. But the good news is that it has been manufactured (at least) three times …

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Re: Is dban a good drive test

Posted on 2020-05-04, 05:31

by

by Zup

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

So I'm thinking of clearing my drive collection and using dban it does 3 passes of 0 to the drive to blank it out, is this also a good way to know if the drive is good, if it wipes successfully without error? No. You should pay attention to SMART logs and timing. SMART logs are not fully reliable ( …

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Re: Romanian Retro Pc

Posted on 2020-05-02, 06:38

by

by Zup

in Marvin \ System Specs

in Marvin \ System Specs

Have you checked your motherboard? Those old Dells used to have bad capacitors...

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Re: What's the "signature thing" to do after installing an OS?

Posted on 2020-04-29, 21:16

by

by Zup

in Milliways

in Milliways

- Windows 95: Get your first BSOD. - Windows Plus!: Try every theme, cursor and sound combination... and decide to use the default settings. - Windows XP: Get rid of the themes service.

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Re: Is there a way to format a hard drive image outside windows 95 and make it recognize it without fdisk?

Posted on 2020-04-28, 06:01

by

by Zup

in PC Emulation

in PC Emulation

Have you tried using parted? It seems that it can operate over files, so you could: - Create a disk-image using dd (dd if=/dev/zero of=disk.img bs=4*17*512 count=617 should create a disk image of a 617 track, 4 heads and 17 sectors HDD). - Use parted mklabel msdos to create a partition table. - Use …

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Re: Olivetti PCS86 Mouse issues

Posted on 2020-04-24, 15:08

by

by Zup

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Some time ago, I dumped a copy of the three disks included with this system, it was uploaded on this site. That are the disks of a spanish Olivetti PCS86. I don't remember the contents, but maybe you can find the mouse driver there.

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