nvm, the logs are down now. btw the way I was wondering if we could partially reinstate IRC in which no one could send messages, but post updates still showed up because that was very useful.

@Souvik: I never mentioned you in my first post. Only those who abuse IRC. Because I have not seen the logs yet, I'm not fit to judge you at all.

Edit: ninja'd from Qwerty. Now I can check the logs.

We have kept Omnimaga ad free for a long time. Not only that, but they tend to not draw that much money. I do like Juju's idea of selling stuff. I would totally buy an Omnimaga t-shirt, hat, and calc case. But I would never buy a game because those should always be free.


Edit: add posters and also school supplies to the list. folders, pens, pencils, etc. and could someone make a mock-up of what the t-shirts could look like?

That screen angle looks pretty straight forward to me. Besides who actually looks at the screen with their head directly above the calc? When you have a calc on your desk your viewing angle isn't straight anyways. What concerns me most was what the comment on the battery life. Having to turn the the back light off just to get through the day is unacceptable. I've had my Prizm since Christmas now and haven't changed the batteries once. I use it several hours everyday and have the back light on setting 3 out of 5. In fact it has even exceeded the 140 hour claim that Casio made with just the crappy factory supplied batteries that I've used so far.

Quote from: z80man on March 14, 2011, 02:57:53 am

You can edit it if you like. Remember you are an anit-riot squad member now.

I don't like editing other people's posts with a very good reason

Good idea. I should add some random rick rolls to others' posts. 

Nice. With the cortex A8 at 800 Mhz that is just behind the iphone 4 which is many times the price of ubercalc. I'm thinking that the hdmi could be expensive so another possible option could be the mini display port if it is cheap enough. It seems that almost all monitors being manufactured today are equipped with a mini display port. Unfortunately TV's rarely have one, but it might replace hdmi soon.  A much cheaper alternative could be a heavier vga.

As far as I know, emulating a dual cpu device with only a single cpu is near impossible even if the clock speed for the device is three times higher than the emulated one. Reason being is that you have to incorporate multi-tasking on a single threaded device which is hell on any programmer.

You have probably now seen the new Casio Prizm calc. You might also happen to know that it is powered by a SuperH 3 processor. If so, you might want to start coding for it. The purpose of this lengthy tutorial will be to teach you how to write SH3 asm code day by day. I will not be teaching how to do Prizm specific coding, just SH3 coding. I have also designed these tutorials to show parallel between the SH3 and the z80. It is highly recommended that you previously know a machine compiled language such as z80, arm, C, C++, x86, or axe. Other languages such as Java, python, and BASIC can also be used as prior experience, but you may find coding in SH3 more difficult. I also reccomend to everyone, if you have not done already, is to read Qwerty's previous tutorial on SH3 asm here http://ourl.ca/8986. Once I finish this tutorial I will place all of the lessons into a pdf file. I will here document every single instruction on the SH3 and there will be a lesson every day. I may skip a day or week at a time, but I will make up for the days I missed.
__Day One__
__MOV #imm,Rn  0xEnii__
1 cycle, no privilege required, T bit unchanged


I'm going to start this tutorial off with what one of the simplest instructions available. For a z80 coder, it is the equivalent of the ld a,$xx. Because the SH3 is a RISC processor, it only supports 16 bit fixed-length instructions. Therefore only byte values can be stored as immediate data. The hex for this instruction is 0xEnii. Where n is the register (0-15) and ii is a byte of immediate data to be stored in register n. An important note with this instruction is that a sign extension is preformed on the entire 32 bit register even though the data is only a byte. Basically a sign extension is formating the register that way the register is read the same when it is referred to as a long word. The easiest example are positive numbers. Say you want to load $04 into R15. Because $04 is a positive number, 0's will be placed in front of it in the register to reflect this as $00000004. So if you read R15 as a long word later you will see the value of $4 in there. Negative operations are really just the opposite. Say you now want to load $FE aka -2 into R15. Because $FE is a negative value the register is reflected as such. The result would be $FFFFFFFE in R15. Now if you read R15 as a long word you will get the value of -2. Now lets say the cpu did not do a sign extension for the last instruction. Then R15 would read $000000FE. Now if you try to read this, you will get a value of 254 not -2 which you wanted. That now completes lesson one. I hope you are now onto your way into learning SH3 asm. Tomorrow's lesson will teach you how to load data from memory using a displacement value.