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Dear Forum Members, Selling box and packaging for a Roland MPU-IPC-T (MIDI Processing Unit for IBM PC, XT, AT). Perfect for completing a system for a CIB-type vintage collector. Item located in Northern Finland. Shipping internationally by the local Posti's Parcel Abroad service. Please ask...

Dear Forum Members, Time to make room for new vintage gear and find a new home for one special sound card. Selling a 1987/1988 Mindscape Music Board with Glen Clancy's Bank Street MusicWriter software + packaging + box for IBM PC or IBM PCjr/Tandy 1000. Item located in Northern Finland...

Dear Forum Members, Looking for a better quality version of my current NEC MultiSync 3D Service Manual Model JC-1404HMED PDF scan. Ideally it would have all pages present, visible PWB for the assy content, better/clear resolution of all schematics and searchable text. Also interested in a...

Dear Forum Members, This is a continuation post regarding my previous post about the required dummy load resistor. With my dummy load resistor, I am still getting the same in-circuit measured results when trouble shooting (PDF page 31, 2-1 THE SWITCHING REGULATOR UNIT FAILURE) as without any...

Hello. Recently my beloved NEC MultiSync 3D (JC-1404HMED) did not start on every power-on cycle. Now it won't start at all. I've started trouble shooting the issue using this service manual's PDF pages 29 and 30, "2. SWITCHING REGULATOR UNIT OUTPUT ERROR" as no voltages measured across K1-K4 as...

Already previously joined, currently on vacation with time to introduce myself. Background. My earliest experiences with home desktop PCs was with my dad's Commodore PC 10 (4.77MHz 8088 + ATI Graphics Solution + Commodore TTL monochrome monitor) acquired for his research work. We had a C64 but...

Hi, Looking for the EGA Wonder diskette 1 and 2 mentioned in the card's manual page 11 (and the errata page). The ones on archive dot org and vogonsdrivers are for the 800 and 800+ cards. Thanks! -TamaMan

I recently acquired an ATI EGA Wonder card (1987 P/N 16892 REV 1) for my 5170. All features work fine except when set with the "Composite (PC Portable)" settings, the composite signal is in monochrome. IBM's own CGA card composite output colors work fine on the machine. In the Operational...

This is a continuation question from https://forum.vcfed.org/index.php?threads/ibm-5151-monitor-and-ega-wonder-800.1242232/post-1308749 Disregarding polarity for now, how much should the 5151 tolerate difference in Horizontal and Vertical Sync signals? For example, the following frequencies...

Hi, Rephrasing my question regarding a setup of an IBM 5170 (8MHz) with an EGA Wonder 800+ card and an IBM 5151 monochrome monitor. During ATI ETEST "EGA Color Adapter Test", all other graphics modes except "l. 640 x 350 Graphics - 16 Colors" (and most EGA games) will cause the picture to...

Dear Forum Members, Before I start digging deeper, I'd like to know if this is a known limitation or an issue with my setup. Setup: 5170 (8MHz) + ATI EGA Wonder 800+ (N1.00) + 5151. Advanced Diagnostics: Color Display (80 columns). ECONFIG: "EGA in ce80" / "TTL MONO". When running ETEST "Test...

Hi all, I recently got an NEC Multisync 3D (JC-1404HMED) CRT and have been testing it with VGA, CGA and MDA signals. All seems fine except when powering on the CRT, the brightness is very low. This can be compensated with the brightness control. Then, after time, the brightness keeps...

Dear Forum Members, Just recently got a NEC Multisync 3D CRT monitor (JC-1404HMED) and after initial inspection, all seems OK except one of the pins on the D-Sub Mini 15. Pin 6 seems to be either broken or recessed by design. I compared the connector to my other CRT from the same time period...

Dear Forum Members, I recently acquired a Commodore PC 10-S (yes, the letter S) and I am currently looking for any information about this "S model". We used to have a Commodore PC 10-II (w/2x360k drives) in the past and this S variant seems to be quite similar. Can anyone help me to find a...