oompa loompa
I AM THE GOVERNATOR 
"Git 'Er Dun!"
Posts: 1,301
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Post by oompa loompa on Mar 15, 2006 0:58:04 GMT -5
i don't really have any schematics of the machine, just match address with address and data with data, and then wire up everythign else in my head  . i'll try to make schematics or diagrams of the programmable logic + sync maker chip, since it's like the heart of the whole computer. not gonna guarantee that anything would work because of the overclocked z80 |
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Post by imsoftware on Mar 15, 2006 9:47:36 GMT -5
Anywhere, it cool work! Which Z80 are used in this monster? Something like Z80H? There is no need to overclock it, real clock of this CPU is 21 MHz! But some instructions (Jedec-files, PCB of videoshify) is necessiary! Data to data, adr to adr... hmm.. Is it really can work? I think that 7 IC's not enough to be a complete (maybe not).
OK, let's see at your scheme (when it will be..).
p.s. what about using Z8Encore (I2C, SPI, SRAM Control, etc..)? Dual CPU - not bad idea!!
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Post by GiGaBiTe on Mar 16, 2006 14:05:24 GMT -5
the whole point of the computer was to make it as simple as possible. a native 21 MHz Z80 would be alot harder to wire up, and much harder to program. dual CPU's would be even harder to make because of memory sharing.
i was digging around on the wikipedia last night and found out that the VDP in a genesis is a modified texas insturments VDP, with the sega name and some part number plastered on it. that model was superceeded by a yamaha v99xx which can do like 320,000 colors at 512x384, but it has some odd limits that would make it difficult to make games on.
i was thinking about making a mini-computer, but im going to have to do ALOT of reading on how to do it (wiring up a 68030 is going to be incredibly hard) and what to use for a video output and sound (if any)
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Post by pmjobin on Mar 16, 2006 22:53:43 GMT -5
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Post by imsoftware on Mar 17, 2006 4:10:05 GMT -5
Simplest way to do VDP (as for me) - is Xilinx CPLD! There are many schemes and HOWTO for this.. About tone generator.. Maybe on Altera? Or AY8910 (8912)..
p.s. Still wayting for X-Monster Z80 :-)
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Post by GiGaBiTe on Mar 19, 2006 1:42:46 GMT -5
any surface mount chip would be a pain in the arse to solder, but you could always use the toaster oven method (no idea how effective that would be) or find someone that could solder the chip onto a PGA converter and use a socket for it.
i have 2 PGA 68030's that i might try something with, although i dont know which one to use, one is an XC class and the other is MC class. the XC class has a 68881 math FPU with it that might be of some use.
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oompa loompa
I AM THE GOVERNATOR
"Git 'Er Dun!"
Posts: 1,301
|
Post by oompa loompa on Apr 10, 2006 17:13:38 GMT -5
the overclocked Z80's i used are Toshiba's TMPZ8040-8. they're only suppose to run at a max of 8 mhz stock  i don't have any sophisticated xilinx, or altera programmable logic (FPGA or CPLD). i have the simple combinatorial logic ones, like the GAL20V8  |
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Post by BRPXQZME on May 14, 2007 0:04:44 GMT -5
WTF??! a 11 page guide that only shows registers and how to use LD instruction? At least it's something easy to learn.. "Z80 for dummies" "Now with addressing modes, TR levels and such crap for u-boobs, now only at theaters" Gimme a break! I wrote that in the summer between 7th and 8th grade, and rather unaware that I have bipolar disorder Really should update it for less... stupid. (My apologies for bumping the thread) |
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. i'll try to make schematics or diagrams of the programmable logic + sync maker chip, since it's like the heart of the whole computer. not gonna guarantee that anything would work because of the overclocked z80
