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- Mode Resolution Frame VIDC Version Date Author
- rate speed
- ---- -------- ----- ----- ---- -------- ------
- Mode32 - 800x600 8bpp 2.5e 13/05/91
- Mode32a - 800x600 8bpp 1.00 22/10/92 David Bilsby
- Mode67 - 960x384 4bpp 78Hz 36MHz 0.18 27/02/89 Jonathan Roach
- Mode110 - 1120x448 4bpp 55Hz 1.00 24/03/92 George Taylor
- Mode118 - 1024x464 4bpp 60Hz 1.00 24/06/92 George Taylor
- Mode120 - 896x344 1bpp 90Hz 36MHz 1.02 02/07/92 Paul Dellar
- 121 - 896x344 2bpp
- 122 - 896x344 4bpp
- Mode124 - 1024x768 4bpp 36Hz 1.00 25/04/92 Matthias Sattler
- Mode125 - 1024x640 4bpp 57Hz 50MHz 1.00 11/09/92 Matthias Sattler
- Mode126 - 1280x512 4bpp 60Hz 50MHz 1.00 11/09/92 Matthias Sattler
-
-
- Notes
- -----
- A VIDC enhancer is required for at least those modes shown as having a VIDC
- speed of 36MHz.
-
- From: Owen Smith (/G=Owen/S=Smith/O=SJ-Research/ADMD=INTERSPAN/C=GB/@mhs-relay.ac.uk)
-
- Mode67 is a 78Hz frame rate 36Mhz mode, 16 colours oblong pixels. It works
- well with the Eizo 9060 and other multisyncs as a day to day programming
- mode - reasonable screen area and no trace of flicker whatsoever. It really
- kills 8MHz memory ARM2 systems though - takes half the memory bandwidth.
-
- The Mode120 module provides modes 120, 121 and 122. These are exactly the
- same as modes 37, 38 and 39 except that they run the VIDC at 36 rather than
- 24 MHz. This give a frame rate of 90Hz rather than the usual 60Hz. 60Hz might
- sound high enough, but mode 122 looks a lot better on an Acorn Multisync than
- mode 39 does - maybe the phosphor has a fairly low persistence.
-
- From: Matthias Sattler (m_sattle@tangram.informatik.uni-kl.de)
-
- Mode 124 can be used on A540 and A5000 but it will only have 36Hz picture
- frequency. If clock your VIDC with 50 Mhz it will have 50Hz then (I tried
- this and it worked fine except that 50Hz is still too flickery for me). If
- you choose 60Mhz for your VIDC it will have 60Hz but my VIDC didn't do this
- (as I wrote in my previous article).
-
- From: George Taylor (gst@dcs.ed.ac.uk)
-
- Mode110 runs at about 55Hz and I notice it flickers a bit, also it causes
- my monitor to produce a slight high pitch (very high) whine when in use.
- This whine can be stopped by slightly reducing the horizontal screen width.
- Mode118 runs at 60Hz has more vertical height than 110 but slightly less
- width. (this mode also takes slightly more RAM bandwidth than 110 but the
- difference is fairly small).
-
- From: bilsby@hermes.mod.uk (David Bilsby)
-
- The Mode32a file is a mode 32 module which I did on my A5000 and NEC II
- monitor. If anyone has any huge complaints about the alignment it has on
- your monitor I may consider producing several versions with various offsets.
-