I’m going to try some of the utilities mentioned but I’m confused how any of the tools can force 15 kHz when it sounds like everybody is saying VGA is always line doubled? It intercepts the BIOS calls and uses a modified video mode. I´ll post the README from the second utility: --- The program …

What is going on. Is this the best a Pentium MMX 200 can do? Is my memory from '94 rose tinted? Try increasing the ISA bus frequency in the BIOS SETUP (that is decreasing the clock divider). You may also try other FSB/CPU clock combinations, as to increase the ISA bus frequency, even if it slows …

These are the ISA sound cards I have on hand: SoundBlaster CT2290 - true OPL3 card, it's in my K6 system for now SoundBlaster CT4170 Vibra 16XV - fairly integrated card, CQM Aztech 138-MMSN855 - interesting card with a modem, but not sure how good it is Hi! CQM sounds very bad with FM music. I once …

Does anybody know if it's possible to output 320x200 (EGA) on a VGA card? If I understand correctly, VGA cards doublescan the output resolution so 320x200 is output as 640x400 (confirmed on my PC monitor and scalers). I'm testing an upscaler (DExx, from the creator of the OSSC) which can upscale to …

Grzyb wrote on 2022-10-15, 13:01: What VGA card you have in that Turbo XT? Chances are, it supports register-level CGA compatibility mode... Trident T8900D or 9000B, don´t remember now. But the utility I mentioned sets the VGA card to 480 line mode to obtain a 60Hz refresh. That´s the reason …

https://github.com/joncampbell123/doslib/blob … hw/vga/vga240.c This utility can set some VGA modes to 60Hz. Tried with AlleyCat and it indeed set it to 60Hz (the image gets a little squashed). It did not solve the delay problem I mentioned.

maxtherabbit wrote on 2022-10-15, 02:42: CGA/EGA games do indeed sometimes run too fast at 70Hz Alley Cat has some small delay in the controls with VGA card on a Turbo XT. The problem of course don´t occur with a CGA card. Could it be the 70Hz refresh?

I'm wondering how long it takes to decode 1 minute of FLAC sound on an 8088@4.77... ...but no, I don't want spoilers, some day I'm going to revamp my Turbo XT, set it to de-turbo, and see for myself XD I´m curious too. I bet it will be more than an hour, but sometimes the little Intel surprises me.

Try changing these settings:

Jo22 wrote on 2022-10-08, 05:02: It could read natural information of our real world, like a reading from a temperatur sensitive resistor (NTC/PTC) or a light sensitive resistor (LDR). Yay! Hey!! I did that in the late 80´s, with QuickBasic, and plotted a graph or made some weird sound with the …

Flight simulators? Simulation games were much more playable with analogue joysticks. And corporate dudes totally loved simulations. Flight sims, golf sims, .. Yes, I know, but it really ruined the gaming experience for every other genre. The king of (bad) joystick is the TRS Coco with its non auto- …

With many old games (i.e. Montezuma´s revenge), the joystick will only work correctly with a 4.77 MHz machine. Even a Turbo XT (10 MHz) can break joystick support on these games. Why didn´t IBM go with digital joystick, like Atari, Amiga, MSX and almost all 80´s vidogame consoles.

Hi, I´ve tried to run Magicland Dizzy on my XT clone, however the game won´t detect the VGA card, giving only EGA as a choice. Starting the game in EGA mode, the palette is all garbled. The game runs fine, otherwise. This occurs in PcEM with any XT or XT clone. Maybe is a BIOS thing. Would anyone …

Thanks, it worked fine!!

Hi, this seems to be a really useful card. PCem v17 BIOS collection has a file named TRIDENT.BIN. It is the TVGA8900 BIOS.

Is it possible to load the XT IDE BIOS as an early DOS device driver in CONFIG.SYS? Something like 2M-XBIOS does? I usually boot my XT machine from floppy/GOTEK and would like to use a 16bit/AT IDE/multi IO card without burning an EPROM.