Re: Retro Software Development?

Posted on 2022-11-08, 08:25

by

by vstrakh

in Marvin \ Software

in Marvin \ Software

Somehow this example list is all about products, mostly completed or aimed to alter/adjust already existing, mixing hardware production and software announcements. It's not the retro software development talks. What if I want to develop a new game, or game engine for DOS, but looking from the …

---

Re: Trident tvga9000 -1 rom?

Posted on 2022-11-06, 07:52

by

by vstrakh

in Marvin \ Video

in Marvin \ Video

Btw, why are you asking for -1 rom when your chip is -2 ?

---

Re: Trident tvga9000 -1 rom?

Posted on 2022-11-06, 07:50

by

by vstrakh

in Marvin \ Video

in Marvin \ Video

Dumped the Bios from my TVGA9000i-2, not sure if that -1/-2 revision is critical, the version name is the same D4.01E as from file from VGA museum. Filename Trident 9000i-2 Ver. D4.01E.bin.zip File size 20.18 KiB Downloads 4 downloads Filename Trident 9000i-2.jpg File size 1.15 MiB Views 181 views

---

Re: Trident tvga9000 -1 rom?

Posted on 2022-11-06, 06:49

by

by vstrakh

in Marvin \ Video

in Marvin \ Video

I keep getting an device id error. Im not sure what to select in the software. As there is no TMS option. You can uncheck the "Check ID" checkbox in the Options group (bottom left part of the Xgpro app) and retry, reading should work the same for any pin-compatible EPROMs, any 27256 chip will do …

---

Re: Game environments that left a lasting impression

Posted on 2022-11-01, 19:42

by

by vstrakh

in Milliways

in Milliways

For me it's Anachronox . The great storytelling, music, voice acting, locations carrying emotional imprint. Some in-world elements (architecture or furniture designs) are so reasonable and natural you'd wonder why something like this does not exist yet in the real world. I was not accustomed to …

---

Re: Retro Software Development?

Posted on 2022-11-01, 08:24

by

by vstrakh

in Marvin \ Software

in Marvin \ Software

From what I understand from Hamby, this new section should be about programmers talking about programming new stuff for new old machines. No release announcements. This. It's not about specific product development and support. It's not about tutoring the caste of noobs by the caste of mentors ( …

---

Re: De-noising and capacitors

Posted on 2022-10-28, 06:12

by

by vstrakh

in Milliways

in Milliways

I vaguely remember that the factor must be 1,41 for the DC input voltage. Was somehow related to peek envelope something ? So for exampl, a digital IC running at 5V DC needs a decoupling capacitor, intended for filtering, (say bipolar, 100 nF) that can handle at least ~7V AC ? The 1.4 coefficient …

---

Re: De-noising and capacitors

Posted on 2022-10-27, 07:58

by

by vstrakh

in Milliways

in Milliways

That's all fine so far, but I remember that it is even better to add two more caps: 100 Nanofarad(s) and 10 Nanofarad(s) . In addition to the 1000 Nanofarad(s) (1 Microfarad).. Now I wonder, since these values weren't mentioned by that operator back then - are there further values or filtering …

---

Re: JWASM: Error A2189: Constant or relocatable label expected

Posted on 2022-10-24, 20:58

by

by vstrakh

in Marvin \ Software

in Marvin \ Software

Can you tell me, which if##### key word corresponds to which if operator of the following list? EQ = equal NE = not equal LT = less than LE = less or equal GT = greater GE = greather or equal Now i know, that ifidni , can be used instead of IF ( parm1 EQ parm2..). But the others? Did you notice the …

---

Re: JWASM: Error A2189: Constant or relocatable label expected

Posted on 2022-10-24, 20:53

by

by vstrakh

in Marvin \ Software

in Marvin \ Software

It's also a pitty, that the JWASM manual doesn't mention, that i should use ifidni instead of if ( ... EQ ...). By MASM book has also only about 300 pages with a large font size. ifidni isn't even mentioned in the book. This is the link to MASM reference, here's the 'ifidni' directive: https:// …

---

Re: JWASM: Error A2189: Constant or relocatable label expected

Posted on 2022-10-24, 20:14

by

by vstrakh

in Marvin \ Software

in Marvin \ Software

Your issue with EQ might be related to data types expected by this operator. TASM manual say the EQ treats its arguments as unsigned numbers. I'd guess the same applies to MASM, so EQ should not be used for texts comparison.

---

Re: JWASM: Error A2189: Constant or relocatable label expected

Posted on 2022-10-24, 20:07

by

by vstrakh

in Marvin \ Software

in Marvin \ Software

I'm not sure what are you doing, because it works exactly the same as in TASM, which in turn follows the MASM rules. Here's with case-insensitive IF comparison: .model small .stack 256 upc macro Reg8 ifidni , mov Reg8, 35h else mov Reg8, 39h endif endm .code UPC bh UPC ax UPC bl end Compiling it …

---

Re: JWASM: Error A2189: Constant or relocatable label expected

Posted on 2022-10-24, 19:11

by

by vstrakh

in Marvin \ Software

in Marvin \ Software

The " quotes should not be used, it will mean you're comparing two constant string literals, sure the result will be static.

---

Re: JWASM: Error A2189: Constant or relocatable label expected

Posted on 2022-10-24, 17:59

by

by vstrakh

in Marvin \ Software

in Marvin \ Software

Looking at my old TASM code, it's just could be possible that you need to wrap Reg8 parameter name in some brackets in the IF statement, but only within that statement. You did wrap BL already in round brackets, same could be required for Reg8 too. TASM required angle brackets, the macro did look …

---

Re: Game Sound/Video Stuttering in pure DOS, but running fine in Win98. Is it a driver / software configuration issue?

Posted on 2022-10-23, 14:08

by

by vstrakh

in Marvin \ Software

in Marvin \ Software

I don't know if I have combine cache mode enabled in DOS. I've never had to manually enable anything like this before The Write Combine mode appeared starting with Pentium Pro CPU, it's related to Memory Type Range Registers: https://en.wikipedia.org/wiki/Memory_type_range_register . This is not …

---

Re: Game Sound/Video Stuttering in pure DOS, but running fine in Win98. Is it a driver / software configuration issue?

Posted on 2022-10-23, 08:05

by

by vstrakh

in Marvin \ Software

in Marvin \ Software

Another hint. Do you have write combine cache mode enabled for the framebuffer while playing in DOS? I don't know if your card's bios enables it when entering VESA modes in DOS, Windows drivers did that for sure. I remember UNIVBE did enable write combining for my i740, the frame rate becomes …

---

Re: Why does the order how Object files are added to a library with wlib change the performance of the executable?

Posted on 2022-10-21, 18:46

by

by vstrakh

in Marvin \ Software

in Marvin \ Software

The disassembly code of each object file/code is the same. Thus there is only the linker as variable option. Don't look into object files, look at the whole executable, after the linker did its job. The wait function should be everywhere the same, only the position in the EXE might be different. …

---

Re: Why does the order how Object files are added to a library with wlib change the performance of the executable?

Posted on 2022-10-21, 17:16

by

by vstrakh

in Marvin \ Software

in Marvin \ Software

What's the platform you're running it on? It could be anything - different alignment, or cache-friendly layout of the code. It would be good if you looked into the disassembly of the final executable to see the difference. Linker does not know the external conditions, so has no information on how to …

---

Re: What era of computers do you draw the line at collecting and/or using?

Posted on 2022-10-21, 13:44

by

by vstrakh

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Sticking to the range of PCs which could be fully comprehended, and not requiring man-years to reproduce using original components or alternative technologies (FPGA/CPLD/etc), to tinker with the fine details of implementation, or to make new expansion boards. Thus the upper limit would be around ( …

---

Re: Help with identifying capacitor of 286 motherboard

Posted on 2022-10-17, 15:01

by

by vstrakh

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I wonder what 10nF 50V could do around the crystal, being put so symmetrically. It's not the load caps, too high value

---