cBaer

Hi there. And yes, the system, not a game. I build a homebrew Vectrex, working good, but have still some issues not sorted out. The calibrations with the Testcart REV4 are looking good enought, but on the title screen the outer lines are a bit off. On the Homebrew 2048 game the outer line is very off + no round edges and the numbers look horribly. It seems to affect the Y-Axis the most. I alreday swapped out the chips, however had only similar ones. See the video: https://youtu.be/liu6WxhAQeQ I used the schematics of the service manual, however did some changes: VIA is a R65C22P2 (its a CMOS chip). "AY-3-8910A from GI", the datecode is 1341CBA maybe fake but it is doing its duties opamps are TL082L and TL084L (both UTC) DAC is an DAC0808LCN (National semi), the datasheet states that this is a fully compatible replacement for the chip originally used. CD4066BE (TI) CD4052BE (TI) 2N3606 instead of 2N3605 swapped R303_3.6k with a 10k trimmer there are 3 aditional TL082L to optionally invert, amplify and bias the X, Y and Z output to feed my iwatsu SS-5702 Oscilloscope used as the monitor. Five integrator capacitors i used 10nF Styroflex (https://www.reichelt.de/styroflex-kondensator-10n-2-styroflex-10n-p19842.html?&trstct=pol_1) The digital Part worked first try, so im omitting the chanes I did there. I recreated mostly the logic board and the LM386 Part. Are there circuits other than that, that limit the bandwidth of the signals? that would explain why the corners are not round. thank you for any hint or advice. P.S. I have never seen an Vectrex in person so i have nothing to compare to, and this is a retro computer project because BASIC on a Z80 on an Terminal didn't cut it for me