View Profile: shirsch - Vintage Computer Forum

Yesterday, 07:15 AM

shirsch replied to a thread Extron video scaler in Vintage Computer Hardware

It seems to work fine with my Apple //gs. That's 15.something kHz. It's possible that some aspect of the conversion (color trueness?) may suffer a...

7 replies | 73 view(s)

March 5th, 2021, 05:41 PM

shirsch replied to a thread Extron video scaler in Vintage Computer Hardware

Yes, the need to store specific low-level input settings is the exception, not the rule. The built-in memories probably cover 98% of the use cases. ...

7 replies | 73 view(s)

March 5th, 2021, 10:34 AM

shirsch replied to a thread Extron video scaler in Vintage Computer Hardware

I found it easier to tweak settings from the PC while watching the unobstructed display. But, more importantly, you cannot save a truly complete...

7 replies | 73 view(s)

March 5th, 2021, 07:47 AM

shirsch started a thread Extron video scaler in Vintage Computer Hardware

Just wanted to let folks know about these gadgets. I've recently scored a handful of Extron RGB-HDMI 300A scalers on eBay for around $30 each. When...

7 replies | 73 view(s)

March 4th, 2021, 12:55 PM

shirsch replied to a thread Corvus Concept owners? in Other

In case anyone wants to use an Extron (or other device with HD15 in) with a Concept, here is the cable wiring: DB9M HD15M 1...

10 replies | 457 view(s)

February 27th, 2021, 07:31 AM

shirsch replied to a thread IBM 5150 Parity Error in PCs and Clones

Wow - thanks for that detailed breakdown! Sounds perfectly reasonable to me.

13 replies | 257 view(s)

February 26th, 2021, 06:54 AM

shirsch replied to a thread IBM 5150 Parity Error in PCs and Clones

I was unable to find a diagnostic ROM for 5150. The only ones I saw were for XT (5160). I've been through a pile of XT and PC motherboards in the...

13 replies | 257 view(s)

February 24th, 2021, 02:31 PM

shirsch replied to a thread IBM 5150 Parity Error in PCs and Clones

Nailed it. When all else has been ruled out whatever is left, however unlikely, must be the culprit. Even though the error code indicated a problem...

13 replies | 257 view(s)

February 24th, 2021, 11:54 AM

shirsch replied to a thread IBM 5150 Parity Error in PCs and Clones

More information: Since the '82 ROM version requires that all banks be populated, I decided to try older ROMs to see if I could get POST to pass on...

13 replies | 257 view(s)

February 24th, 2021, 07:04 AM

shirsch replied to a thread IBM 5150 Parity Error in PCs and Clones

Ok, so this is getting interesting. The original reference I found for POST errors said this: 5150/4450 (PC-1) Failing Memory Module Bit/Bank...

13 replies | 257 view(s)

February 24th, 2021, 06:33 AM

shirsch replied to a thread IBM 5150 Parity Error in PCs and Clones

The sockets look fine - nice and shiny with no bent or broken wipers. Switch settings: SW1: on on off off off off on on SW2: on on on on on off...

13 replies | 257 view(s)

February 23rd, 2021, 05:09 PM

shirsch started a thread IBM 5150 Parity Error in PCs and Clones

I'm going through a few PC and XT motherboards here. One of the 16K-64K PC boards is showing error code '0401 201' followed by 'Parity Error 1'. ...

13 replies | 257 view(s)

February 22nd, 2021, 09:23 AM

shirsch replied to a thread Lisa 2/10 floppy and hard drive replacements? in Later Apple (68000+ based machines - Mac, Lisa, etc.)

It depends on what software environment you plan to use. Lisa Office System will not work with any SCSI solution - ProFile or equivalent is...

23 replies | 414 view(s)

February 22nd, 2021, 07:15 AM

shirsch replied to a thread Lisa 2/10 floppy and hard drive replacements? in Later Apple (68000+ based machines - Mac, Lisa, etc.)

Floppy Emu works fine on Lisa: https://www.bigmessowires.com

23 replies | 414 view(s)

February 17th, 2021, 04:58 AM

shirsch replied to a thread For Sale: spotted on Craigslist (continuous sightings) in Vintage Computer Items For Sale or Trade

Is this a rebadged Canon Cat?

2346 replies | 462751 view(s)

February 16th, 2021, 02:01 PM

shirsch replied to a thread Corvus Concept owners? in Other

Here is the Concept in portrait mode using the Extron scan converter. Looks better than the OEM monitor, IMHO. I need to tie RGB together for a...

10 replies | 457 view(s)

February 14th, 2021, 12:49 PM

shirsch replied to a thread Corvus Concept owners? in Other

After building the appropriate adapter, I'm able to get a stable display from the Concept by use of an Extron RGB-HDMI 300A scan converter. ...

10 replies | 457 view(s)

February 7th, 2021, 01:06 PM

shirsch replied to a thread Ampro Little Board Plus and SmartWatch in CP/M and MP/M

Any possibility the battery may have gone flat?

2 replies | 174 view(s)

February 5th, 2021, 11:04 AM

shirsch replied to a thread ZCPR3 for Montezuma CP/M on TRS-80 M4 in CP/M and MP/M

You are always able to intermix raw disk images with HFE - even in the same directory. FF is smart enough to understand that a file extension of...

8 replies | 315 view(s)

February 5th, 2021, 09:26 AM

shirsch replied to a thread ZCPR3 for Montezuma CP/M on TRS-80 M4 in CP/M and MP/M

Quick followup: I have been working with Montezuma Micro CP/M on my M4 for a day or so using a FlashFloppy (Gotek) as drive A:. Initially I used the...

8 replies | 315 view(s)

February 5th, 2021, 06:48 AM

shirsch replied to a thread ZCPR3 for Montezuma CP/M on TRS-80 M4 in CP/M and MP/M

I never found the startup latency to be objectionable, but perhaps MM CP/M is an outlier. I'll give it a try here. The nzblitz approach that...

8 replies | 315 view(s)

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