Author
| 44256 IC always on Trident TVGA?
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Chardson
msx lover
Posts: 93 |  Posted: January 13 2005, 21:58 |
What I want to know is if every Trident TVGA video cards models comes with those 44256 ICs. And if not, wich models of TVGA do have the chips.
I am planning to expand my WSX mapper.
Thx!
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flyguille
msx master
Posts: 1183 | Posted: January 14 2005, 04:26 |
some times come in package DIL and others un superficial format.
also olders EGA/VGA 256MB/512MB cards comes with those chips.
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Sonic_aka_T
msx guru
Posts: 2262 | Posted: January 14 2005, 16:53 |
kB?
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dhau
msx master
Posts: 1047 | Posted: January 14 2005, 20:18 |
I recently picked up a Trident SVGA card from 1991, and it came with 8 x 514256 chips @ 100ns. The model was 8900TC (True Color edition, 1MByte). Regular 8900 SVGAs came with 512KBytes. All other Trident ISA SVGA cards I saw come with one or two presoldered SOJ dram chips, which isn't useful
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Chardson
msx lover
Posts: 93 | Posted: January 14 2005, 23:05 |
is 514256 complatible with 44256? Sorry, I know almost nothing about ICs. Here in Brazil is relatively easy to find TVGA models, it appears most of them are 9000 model and its revisions.
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pitpan
msx master
Posts: 1368 | Posted: January 14 2005, 23:21 |
Quote:
| some times come in package DIL and others un superficial format.
also olders EGA/VGA 256MB/512MB cards comes with those chips.
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Fly, isn't that a huge amount of RAM for an ancient graphic card? 512 MB sounds like a big deal!
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flyguille
msx master
Posts: 1183 | Posted: January 14 2005, 23:25 |
jajaja, KB sorry...
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dhau
msx master
Posts: 1047 | Posted: January 15 2005, 03:55 |
I used them in past, yes they work. Basically you need DIP-20 memory chips with 256Kwords of 4-bit words (which is 128KBytes of memory. The key numbers are 4256 = 4-bits x 256-Kwords. I'm not a big expert as well. One thing, try getting 100ns chips or faster. I think with 150ns chips Panasonic MSX2+ computers might have trouble in 1.5x Z80 mode
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