Which MS-DOS for a Tandy 1000SL?

The Tandy 1000SL is a neat XT compatible with a few tricks: advanced mode with 16 colors and a sound chip! Unfortunately, it only has 576 KB of available base RAM. So the trick is to find a MS-DOS with the best features for the lowest RAM. So I decided to make some tests: Total Reserved Used Free MS-DOS 3.20 570 454 44  […]

Libretto 50CT Volume Mixer

The Toshiba Libretto 50CT originally came with Windows 95. It was not meant to be used with MS-DOS, and it does not have a hardware volume control. The Libretto uses an OPL3 sound chip that is Sound Blaster compatible—or perhaps the other way around, since Sound Blaster uses OPL3. However, compatibility does not extend  […]

Fix a Compaq Portable III floppy drive

I got a Compaq Portable III for very little money, mainly because it was considered dead. Disassembling, cleaning, and reassembling it somehow brought it back to life, with the exception of the CMOS battery and the floppy drive. I would not usually mention the CMOS battery, because it is obvious that batteries this old  […]

Floppy Drive USB Emulators

There are many Floppy Drive USB Emulators and not all are equal. Here is a list of GOTEK models: Formatted capacity 1.44MB : SFR1M44-*** 1.2MB : SFR1M2-*** 720Kb : SFRM72-*** Cables IDC34pin+4P power plug IDC26pin withour additional power FPC26 flat cabel 1.0MM pin distance use mdoel SFR***-**26 FPC26 flat cabel 1.25MM  […]

AST Premium Exec 386SX/20 missing power supply

I got my hand on a AST Premium Exec 386SX/20 without power supply. Unfortunately the DIN-8 pin is not very standard: This is extracted from the following picture: The power adapter ref is AST CS714A. Sources: AST Premium Exec 386SX/20 missing power supply AST Premium Exec 386SX/20

Ret0bright for newbies

I've been intrigued by Ret0bright for some time. This magic cooking recipe makes your old yellowed plastic computers like new again. It is not very clear what the consequences of the treatment are, since it involve chemical reactions and interactions with light and oxygen. The recipe is a bit complex though, but I  […]

Fix a Commodore SX-64 floppy drive

I recently got a Commodore SX-64 to play with. Problem; the floppy drive, a Commodore 1541 was working a bit too randomly to my taste. Luckily, it is quite to find good advice (but also bad one) on the vast internet. It came out to be a problem with the drive spindle clamp mechanism. I found a very useful forum post  […]

Hard Drive Geometries

Just a reminder of some of the vintage HDDs I still use... Conner CP3044 (40 MB) BRAND MODEL SIZE CYL HDS SECT WPCOMP LZONE TYPE WHERE? LINK CONNER CP3044 40 MB 980 5 17 0 980 ATA Specs CONNER CP2121 120 MB ATA Compaq Contura 4/25 PDF · Specs TOSHIBA MK4025GAS 40 GB 16383 16 63 0 16383 ATA-100 Specs

3.5" Floppy Disk Drive Connector Pinout

I may need to build a 34 (standard) <-> 26 (laptop) connector soon. Source: IBM/PC pinout (common PCs) Pin Name PC Drive Description 2 /REDWC Density Select 4 n/c    Reserved 6 n/c   Reserved 8 /INDEX Index 10 /MOTEA Motor Enable A 12 /DRVSB Drive Sel B 14 /DRVSA Drive Sel A 16 /MOTEB Motor Enable  […]

RS232 DB9 Loopback Plug

Title says it all :) I wanted to build a serial loopback plug compatible with the ancient CheckIt diagnostic tool. It wires serial inputs to serial outputs so that the port may be tested. There is more than one way to wire up a loopback plug - but this is the most common. Pinout front view: From Pin Pin To CD 1 6 DSR  […]

PXE aka Net Installation of a Windows Server

I needed to install Windows Server 2012 R2 on a PC with no optical drive and I didn't have any USB device to put the image on. I resorted on using a network install through PXE. I found a great win app to do so, Serva. Serva is a tiny (~1 Mb), yet powerful Microsoft Windows application. It was conceived mainly as an  […]

ZOTAC 9300-ITX DDR3 compatiblity list

Source : http://forum.hardware.fr/hfr/Hardware/carte-mere/topic-unique-zotac-sujet_841219_77.htm ZOTAC 9300-ITX DDR3 Tested CPU list CPU type Speed CMOS CPU power Celeron 420 1.60GHz 65nm 35W Celeron 440 2.00GHz 65nm 35W Celeron Dual-Core E1200 1.60GHz 65nm 65W Celeron Dual-Core E1500 2.20GHz 65nm 65W Celeron Dual-Core  […]

Secure Erase & Linux

sudo hdparm -I /dev/sdc sudo hdparm user-master u security-set-pass Einstein /dev/sdc sudo time hdparm user-master u security-erase Einstein /dev/sdc Result /dev/sdc: Issuing SECURITY_ERASE command, password="Einstein", user=user 0.00user 0.00system 2:38:09elapsed 0%CPU (0avgtext+0avgdata 624maxresident)k  […]

Playing with KeyGen

From http://www.rover12421.com/2014/11/1..., now in C#. Source code attached to this page.

Vintage ISA super I/O card Winbond W83757F

For reference. I'm playing with this card from time to time, although the IDE controller is not behaving well (at least with Compact Flash drives) chip: W83757F (205NA47075) super I/O card FCC ID:ID2-W83757 output ports: COM + LPT onboard ports: IDE + FDC source

Force resolution in Linux using xrandr

Easy peasy! xrandr --newmode $(gtf 1280 1024 60 | sed -ne 's/"//g;s/ Modeline //p') xrandr --addmode VGA1 1280x1024_60.00 source

Can I turn this old Toshiba laptop into a synthesizer?

Some links only... http://dynabook.com/assistpc/download/winxp/readme/sound/a1x10sndx.htm https://www.google.fr/search?q=YAMAHA+DS-XG+msdos https://www.google.fr/search?q=ymf+754b+msdos http://www.yamaha.co.jp/english/product/lsi/download/ So this is for later. Maybe...

Enable rtsp conntrack on DD-WRT

source Routeur (pas de la Freebox) et multiposte source OpenWRT-conntrack source MAJ V23SP2 V24 RTSP Conntrack KO

Enable Freebox Multicast in bridge mode

French ISP Free provides TV multicast ("multiposte") on top of its own Freeplayer box as long as you use its box in router mode. Unfortunately the Freebox router itself is rather limited; I've got a DD -WRT router behind it and the Freebox is in bridge mode. To enable multicast, Freeplayer must be on both the local  […]

The User Profile Service service failed the logon. User profile cannot be loaded.

I was looking at a Windows 7 machine that whenever a new domain user who had never logged onto a machine before got the following error message: The User Profile Service service failed the logon. User profile cannot be loaded. Now in this case there was an existing Microsoft KB article for this located here  […]

Page top