Article View: comp.sys.amiga.applications
Article #14018Re: IBrowse public screen / serial conflict
From: Neil Bothwick
Date: Wed, 22 Jan 1997 00:00
Date: Wed, 22 Jan 1997 00:00
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Hi there Hans Olsen, I believe it was you who said:
> Neil Bothwick wrote:
>> But that's on an AGA machine,, where you hit problems with 256 colour
>> screens. Remember AGA has 32 bit Chip access, whereas the A500 uses 16
>> bit access.
> Aha.. That's a bummer.. But i still think it would be a good idea to
> move as much
> as possible of the system to fastmem (VBR, SSP & Exec) so the CPU have
> to wait
> as little as possible for chipmem access.
It's got very little to do with the CPU. This is a DMA issue, and the
serial port and video display are fighting over the same,
insufficient, bandwidth. The serial port loses out because it's
inadequate buffer means *any* delay results in lost data.
Neil
--
Neil Bothwick, Warrington, England - CU Amiga CD compiler
Connected via Wirenet - The UK's first Amiga-only internet access provider
Mail: info@wirenet.u-net.com WWW: http://www.u-net.com/~wirenet/
--
Me? FAT? No, just horizontally disproportionate...
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f6f0c,ad3922aa4524ce20 X-Google-Attributes: gidf6f0c,public X-Google-Thread: 167cde,ad3922aa4524ce20 X-Google-Attributes: gid167cde,public X-Google-Thread: 11015b,ad3922aa4524ce20 X-Google-Attributes: gid11015b,public From: Neil Bothwick <neil@wirenet.u-net.com> Subject: Re: IBrowse public screen / serial conflict Date: 1997/01/22 Message-ID: <1114.6961T557T85@wirenet.u-net.com> X-Deja-AN: 211555110 references: <1159.6950T754T2340@enterprise.net> <2313.6951T921T228@copywriter.co.uk> <1808.6956T584T1891@wirenet.u-net.com> <32E36AC0.3954@student.hk-r.se> <1043.6960T85T1171@wirenet.u-net.com> <32E508AA.1FA5@student.hk-r.se> x-info: The UK's first Amiga-only Internet Access Provider organization: Wirenet Amiga Internet newsgroups: comp.sys.amiga.applications,enterprise.general.amiga,demon.ip.support.amiga