I found a Kingston Turbochip in a scrap lot - less than £10 for this thing and it works perfectly 😀 So loud though, so I can see why it was considered scrap. The performance difference it makes for this ISA-only with broken L2 cache is immense, Doom goes from pretty slow to downright playable.

Here's how I found it:

It replaced a 486 SX33 on this board, which is the 'proper' chip for this ISA only 486 with broken L2 cache (and broken speaker apparently):

This all runs off of a PicoPSU with an AT-ATX adapter and a constant current power supply so I can see power usage and see if a short occurs. The power bump from the 486SX33 to the 5x86 133 is quite significant - it went from 11 watts average power to 18-20 watts:

The speed check is close to where a 5x86 133 would be without any L2 cache:

Not bad for 10 bucks. Anything else fun in the scrap lot?

everything else in the 'lot' was absolutely pointless/worthless. LCD PCBs cut in half, a laptop hard drive's PCB and some FPC cables all snipped into bits for some reason. 😁

Well at least the most important item was safe and functional

Yep, a very nice surprise 😀 I wasn't going to pay a premium price for this upgrade chip since I've already got 486 boards that have a voltage regulator, but it's nice to see one in operation and the kind of performance boost it gives even to slower systems.

For the price it's a great deal and fun to own but not worth paying what they normally go for.

CMB75 wrote on 2020-07-07, 20:07:

There is nothing “wrong” with that chipset generation , it just lacks features and caches only a quarter of the RAM of the later generation G (128MB vs. 512MB).

Is the way to identify this by looking at the letter at the end of the big string of numbers and letters just above "Taiwan"?

devius wrote on 2020-07-08, 08:06:

CMB75 wrote on 2020-07-07, 20:07:

There is nothing “wrong” with that chipset generation , it just lacks features and caches only a quarter of the RAM of the later generation G (128MB vs. 512MB).

Is the way to identify this by looking at the letter at the end of the big string of numbers and letters just above "Taiwan"?

Yes, but you can derive it from the ASUS revision, also.

Sound Card/Wavetable Board arrived today. From reading i think this card come out of an IBM machine.

S-16FP/L Crystal CS4236 Sound card & S-W1/C Daughterboard with Crystal CS9233 Synth.

Bancho wrote on 2020-07-08, 10:41:

Sound Card/Wavetable Board arrived today. From reading i think this card come out of an IBM machine.

S-16FP/L Crystal CS4236 Sound card & S-W1/C Daughterboard with Crystal CS9233 Synth.

IS the CS4236 the "broken" Crystal card?

MKT_Gundam wrote on 2020-07-08, 12:05:

Bancho wrote on 2020-07-08, 10:41:

Sound Card/Wavetable Board arrived today. From reading i think this card come out of an IBM machine.

S-16FP/L Crystal CS4236 Sound card & S-W1/C Daughterboard with Crystal CS9233 Synth.

IS the CS4236 the "broken" Crystal card?

No, thati s the 4235. 4236 is sweet sweet sweet CrystalFM.

no, the CS4236 is good 😀

the broken one is the CX4235

imi wrote on 2020-07-08, 12:27:

the broken one is the CX4235

Ah damn... that's the only Crystal chip I have in my collection 😆 What exactly is wrong with it?

the FM implementation is just broken, it's an ok card otherwise, but FM is what we are after mostly I guess ^^

also I appreciate all the bad eggs in my collection as well, I also have one 😁

Today I got the holy grail of the libretto owners. The enchanted port replicator 😉

that's thicc :3c

that's phat

Predator99 wrote on 2020-07-02, 20:14:

Hups...I agreed on an acceptable price for 3 boxes with more than 30 kg in total... 😒 There was at least one interesting card in each, therefore I will take only some few items and sell the remaining parts again asap. 1 sellers pic of each box...

Boxes arrived, 1st one processed. What I am going to keep for the 1st run..dont think it needs to be commented. One of the NICs is a ISA 100 MBit!

Next

Bought another i386 DX-33 that has double-sigma symbols (ΣΣ) SX211 and 8MB SIMM-30 70ns FPM Parity RAM for my 386 machine.