deathshadow
Veteran Member
- Joined
- Jan 4, 2011
- Messages
- 1,378
Playing around on my 4P in model III mode, and I could swear I'm remembering this different. Was the model III character set that radically different from the Model 1?
I could have sworn that apart from upper/lower case they were identical, but it looks like characters 0..0x20 and 0xC0 to 0xFF are different. Researching it doesn't line up with this old sod's memory. Though I went through so many third party character ROM on the model 1 that could be messing with my memory. Hell I had a lower case kit that did proper descenders, a full whopping 2 pixels instead of one.
Is it correct that the model 1 had an entirely different set of characters in the bottom 32, and repeated the semigraphics normally at 0x80 to 0xBF in the top 64? Unlike the model III that has a whole slew of (semi-useless for English language users) characters up top?
And resolution. I could have sworn they were all 6 pixels wide per character, with the font stored sideways, but the model III manual and visual inspection says they're 8 pixels wide, not six. Could have sworn the model 1 and 3 were both 384x192... was the III really 512x192? (and therefor 640x288 for model 4?)
That change in the bottom 32 should have led to some software not working right on the III... is that correct too?
I think I'm just having a brainfart. It's been too many years since I dealt with these platforms. Which is sad. As much as I learned on the ELF, and the ZX-80 has a warm spot in my heart, the model 1 was the first platform I actually felt like I was "accomplishing something."
I could have sworn that apart from upper/lower case they were identical, but it looks like characters 0..0x20 and 0xC0 to 0xFF are different. Researching it doesn't line up with this old sod's memory. Though I went through so many third party character ROM on the model 1 that could be messing with my memory. Hell I had a lower case kit that did proper descenders, a full whopping 2 pixels instead of one.
Is it correct that the model 1 had an entirely different set of characters in the bottom 32, and repeated the semigraphics normally at 0x80 to 0xBF in the top 64? Unlike the model III that has a whole slew of (semi-useless for English language users) characters up top?
And resolution. I could have sworn they were all 6 pixels wide per character, with the font stored sideways, but the model III manual and visual inspection says they're 8 pixels wide, not six. Could have sworn the model 1 and 3 were both 384x192... was the III really 512x192? (and therefor 640x288 for model 4?)
That change in the bottom 32 should have led to some software not working right on the III... is that correct too?
I think I'm just having a brainfart. It's been too many years since I dealt with these platforms. Which is sad. As much as I learned on the ELF, and the ZX-80 has a warm spot in my heart, the model 1 was the first platform I actually felt like I was "accomplishing something."