Hello,

when I try to install OS/2 2.0 on a PS/2 55SX (386SX 20, 4 Mb RAM) with ESDI hard drive (geometry 762/6/26 like the real hardware), PCem v14 crashes with "Bad Attention Request 03".
Crash happens when HPFS formating drive.
Can someone confirm this is a bug ?

Hello, I see recent improvement on cdrom and video cards timings and I think it could be interesting to see the same improvement for hard drives. Cause even on slowest MFM drives (8 bit controller, access time near 100ms and throughput lower than 1 Mb/s), PCem format and access drive really fast. I ...

Hi, Sarah : can you explain me why you did this svga->hwcursor.addr = (0x1fc000 + ((val & 0x3f) * 256)) & svga->vram_mask; instead of svga->hwcursor.addr = (vram_size-0x4000) + ((val & 0x3f) * 256); as the first prevent an hypotetical 4 Mo display memory ? The docs says that the hardware...

Do the mainboard BIOS not have already video BIOS code inside ?

Hello,

I don't know if it's difficult to do but some emulated PCem boards (Intel Advanced/EV for instance) have onboard chips that aren't emulated : S3 Trio 64V+, SB Vibra 16.
Is it possible to add onboard chips emulation for future version please ?

Regards.

Thanks,
it fixed compilation using MSYS2. Maybe Sarah will commit this change.

Ok thanks for the clarification Sarah. So, in theory, i could generate a 80 Mhz VCLK. True ?
And how is this frequency simulated with pcem ?

I use Trident ones. There is differences between TGUI9440 and 8900D : one use calculated VLCK and the other register fixed ?

Hello,

Can someone explain how multiples VCLK is handled in Pcem ?
I found out (or maybe i'm totally wrong) that there is one svga clock and two fixed const but in case of more ?
Regards.

Does someone knows a good ADPCM sound player on DOS/windows 3.1 ? I found samples but can't use them to make my tests.

Ok. Is this functionality planned ? v14 ? I know there's surely other priorities
Qemu and Bochs seems to support this.

Hello,

i would like to know if there is code in PCem that handle SMM/SMI ?
SMM is mainly used by APM and some OEM code : http://opensecuritytraining.info/IntroB ... %20SMM.pdf

Process Explorer 11.11 should work

Hello, I fixed the sound loop and polished a little more the code.I focused on making the GUS MAX works. Analog Device and Crystal emulation are splitted for future expansion but right now it's not really usefull. Patch needs testing so here it is : src.zip I need to find out how ADPCM 4bit works bu...

So no one is interested in theses cards ?
I finally succeded in launching Win 3.1 with GUS MAX driver. But this leads to another problem as samples are playing in a continuous loop. I probably ovelooked some latches.

I could not reproduce with build f05fbc5 as MR 386DX is working. Perhaps it's related to later changes.

@JosepMa : I can do the test on an AWE64 if you need to.

@omarsis :
cause it shouldn't be too hard to add as CS4231 is really close to the AD1848 that PCem already emulate (as part of WSS) and Crystal sound cards (4231/4232/4236) can be found on many boards.

Hello, first, as a warn, i'm no programmer, so don't blame me for what you will read below. I think that PCem could add GUS MAX support as nearly everything is already emulated : a gus MAX is classic GUS with the addition of a CS4231 Codec (WSS). I read the GUS SDK, a CS4231 tech sheet, compared wit...

Nice Job !
May I ask how did you determine that, for instance, Impulse tracker tests the non variability of the LS byte and the variability of the MS byte to identify the AWE32 ? Reading through ASM code ?

Ok. I didn't know that by default OCP uses SB16 mode . The problem can be reproduced by explicitly selecting the AWE32 output.

OCP works for me without specific configuration : AMI 486 Clone, DX/4 100, 16 Mb RAM, AWE32 (512k,DBOPL) t4,p220,i7,d1,e5, DOS 6.22, NO drivers loaded.
IT (v214) works in SB16 mode but failed to detect AWE32 (without drivers loaded).

Hello,

you have to make sure that PCem support your motherboard chipset ("soundbridge / northbridge"). It's not just a BIOS matter.

Thanks sarah. I tried to dig into your code but i was stuck into this loop thinking that gus supported 16-bit DMA.

Also, save your config file in that folder cause it uses current working directory by default for me.

Hello,
I'm trying to put Ultrasound on 16 bit DMA but setup test keeps failing : Pcem detect that it's a 16-bit DMA (here dma channel is 0x5), but I can't go any further.
Is the GUS test accurate for 16 bit DMA or not ?

Thanks.

Sorry, i forgot that It works flawlessly now with the right ADF and NVR files. Thanks !

Ok, thanks Sarah.
PCem is no more crashing in rev763.
But, conflict is still there and RLL/ESDI is unbootable even with the right nvr file.

I use BIOS PN 33F8152 (11/02/88), model F8, Submodel C, Revision Level 0, Ref Disc 1.05. Which version do you have ?

Hello, It seems that PCem (latest version compiled) crashes on 55SX model. PClog content is : "Write sector buffer count 0036" I know that pgrainbow could boot on ESDI drive with the right nvr file but I can't. Config I use : PS/2 Model 55SX, I386SX 16, 4 Mb RAM, IBM ESDI fixed disk adapte...

I found a workaround : put my 5.25 floppy disk in a 3.5 drive and it works. Not really exact emulation but i can live with that.