Massive slowdown while using PC/AT/XT configurations (lasting 1 minute)

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Katakis
Posts: 101
Joined: Thu 05 Mar, 2015 6:42 am

Massive slowdown while using PC/AT/XT configurations (lasting 1 minute)

Post by Katakis »

I have uploaded a video showing the problems encountered with the earlier models PCem supports, namely IBM PC/AT/XT. If you change to a configuration using a configuration for one of these models, PCem will do a hard reset, causing the CPU percentage to drop to single digits and stays there for about a minute, then suddenly goes back to 100%. This does not happen in v11.

Video: https://www.youtube.com/watch?v=E0l6cQZ_mjk
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omarsis81
Posts: 881
Joined: Thu 17 Dec, 2015 6:20 pm

Re: Massive slowdown while using PC/AT/XT configurations (lasting 1 minute)

Post by omarsis81 »

It doesn't happen in Windows version, I just tried
PCem_Tester
Posts: 6
Joined: Fri 12 Dec, 2014 6:57 am

Re: Massive slowdown while using PC/AT/XT configurations (lasting 1 minute)

Post by PCem_Tester »

This was actually due to the initialization of the EGA video BIOS and this was slow on faster processors such as Core i5. It doesn't happened with another graphic cards like CGA or VGA.
Katakis
Posts: 101
Joined: Thu 05 Mar, 2015 6:42 am

Re: Massive slowdown while using PC/AT/XT configurations (lasting 1 minute)

Post by Katakis »

omarsis81 wrote:It doesn't happen in Windows version, I just tried
It is the Windows version, but I am using Wine to run it since OS X users still miss out on an official port.
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gen_angry
Posts: 102
Joined: Sat 25 Feb, 2017 6:48 am

Re: Massive slowdown while using PC/AT/XT configurations (lasting 1 minute)

Post by gen_angry »

It tends to do it for my XT config as well, I just assumed it was 'normal' and waited it out.

Win10 host, 6700K, GTX 1060-6G, 16G DDR4-3200

edit:

Code: Select all

gameblaster = 0
gus = 0
ssi2001 = 0
voodoo = 0
model = 1
cpu_manufacturer = 0
cpu = 0
cpu_use_dynarec = 0
cpu_waitstates = 0
gfxcard = 3
video_speed = 0
sndcard = 2
cpu_speed = 0
has_fpu = 0
disc_a = 
disc_b = 
mem_size = 512
cdrom_drive = 0
cdrom_enabled = 0
cdrom_channel = 2
cdrom_path = 
vid_resize = 0
vid_api = 0
video_fullscreen_scale = 0
video_fullscreen_first = 1
hdc_sectors = 17
hdc_heads = 4
hdc_cylinders = 613
hdc_fn = E:\PCem\harddisk\IBMXT-driveC.img
hdd_sectors = 0
hdd_heads = 0
hdd_cylinders = 0
hdd_fn = 
hde_sectors = 0
hde_heads = 0
hde_cylinders = 0
hde_fn = 
hdf_sectors = 0
hdf_heads = 0
hdf_cylinders = 0
hdf_fn = 
drive_a_type = 1
drive_b_type = 1
window_w = 0
window_h = 0
window_x = 0
window_y = 0
window_remember = 0
joystick_type = 0
mouse_type = 0
enable_sync = 1

[Joysticks]
joystick_0_nr = 0
joystick_1_nr = 0
config for the XT system. Using:

Board/CPU:
/roms/ibmxt/1501512.U18
/roms/ibmxt/5000027.U19
/roms/ibmxt/xt.rom

IDE:
/roms/ide_xt.bin

Video Adapter:
/roms/ibm_6277356_ega_card_u44_27128.bin

can PM the specific roms and drive file to admin upon request.
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